СТЕНД ДЛЯ ИСПЫТАНИЙ СРЕДСТВ ПОДМАЩИВАНИЯ, ПРЕДНАЗНАЧЕННЫХ ДЛЯ МЕХАНИЧЕСКОЙ РАЗБОРКИ ПРОМЫШЛЕННЫХ ТРУБ

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СПОСОБ АНАЛИЗА ИСПЫТЫВАЕМОГО ОБРАЗЦА ВОССТАНОВИМОГО МАТЕРИАЛА, КОТОРЫЙ СОДЕРЖИТ ЖЕЛЕЗО

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Полезная модель относится к области испытания полимерных материалов на стойкость к абразивному изнашиванию. Устройство для испытания полимерных материалов на стойкость к абразивному изнашиванию содержит держатель образца полимерного материала и контртело с абразивной насадкой, установленные в корпусе с возможностью фрикционного контакта абразива с образцом, и привод вращения контртела. Корпус устройства состоит из горизонтального основания и перпендикулярной ему стойки. На горизонтальном основании установлена платформа, в теле которой выполнен канал с возможностью прокачки через него воды для охлаждения системы. Держатель образца полимерного материала жестко закреплен на платформе и исполнен в форме прямоугольного параллелепипеда, по длине которого выполнен сквозной прямоугольный паз, в котором расположен повторяющий форму паза и фиксируемый в нем стопорными винтами вкладыш, на поверхности которого закреплен испытуемый образец. На вертикальной стойке корпуса с возможностью передвижения ...

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... 1. Приспособление для испытаний на сжатие конструктивно-подобного образца, содержащее две опорные части для закрепления концевых частей образца, отличающееся тем, что каждая опорная часть содержит углубление прямоугольного поперечного сечения, компенсатор, вставленный в указанное углубление и имеющий п-образную форму поперечного сечения, для установки в него концевой части образца и по меньшей мере один крепёжный элемент для фиксации концевой части образца, при этом крепёжный элемент представляет собой по меньшей мере два болта и прижимную призму, расположенную между болтами и компенсатором.2. Приспособление по п. 1, отличающееся тем, что по меньшей мере одна опорная часть содержит два крепёжных элемента, расположенных симметрично относительно углубления.

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Полезная модель относится к устройствам, применяемым при методах испытаний и измерений пластичности и прочности материалов при низких температурах. Техническим результатом предлагаемой полезной модели является возможность изучения изменения свойств материалов, подвергнутых большим пластическим деформациям осадки и сдвига при низких температурах гелиевого диапазона. Указанный технический результат достигается тем, что камера пластической деформации при низких температурах, состоящая из корпуса, в котором установлен силовой блок с приводом создания усилия и опора для образца, отличающаяся тем, что в качестве опоры для образца используется радиально неподвижная наковальня из кубического нитрида бора (КНБ), размещенная на упругом узле силового блока, состоящем из стальных опорных дисков и тарельчатых пружинных колец, расположенных в нижней части корпуса, на таблетку, изготовленную из исследуемого материала лежащую на радиально неподвижной наковальне, опирается узел деформации сдвига силового ...

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Изобретение относится к приспособлениям для позиционирования испытуемых образцов и может быть использовано при проведении испытаний льда на прочность при растяжении непрямым методом или методом раскалывания. Устройство содержит пару элементов из твердых пород древесины, центральные продольные оси которых лежат в вертикальной осевой плоскости образца, выполненного в виде цилиндра вращения с преимущественно горизонтально ориентированной осью симметрии, с обеспечением контакта по всей его длине. Устройство дополнительно содержит две идентичные части, расположенные симметрично относительно вертикальной осевой плоскости размещенного между ними ледяного образца, причем каждая часть состоит из двух параллельных рам, которые ориентированы перпендикулярно оси симметрии ледяного образца, расположены симметрично относительно центра симметрии ледяного образца и съемно соединены с жесткими связями, ориентированными параллельно оси симметрии ледяного образца, а каждая рама выполнена из материала с низкой ...

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Изобретение относится к области исследования механических свойств металлов, связанных с образованием дефектов, возникающих при нагружении металлических образцов. Предложен способ, заключающийся в том, что предварительно на поверхность образца, находящегося в воздушной атмосфере, герметично закрепляют одну или несколько заполненных воздухом при нормальном атмосферном давлении камер, внутренняя полость которых открыта к поверхности образца, в каждой из камер помещают газовый сенсор, затем осуществляют нагружение образца в режиме ступенчатого возрастания нагрузки, газовыми сенсорами регистрируют начало выделения элемента вещества образца, в качестве которого выбирают водород, определяют координаты области образования дефектов по местоположению соответствующей сенсору камеры и рассчитывают объем этой области. Данное изобретение позволяет упростить и расширить возможности исследования механических свойств металлов, связанных с образованием дефектов, возникающих при их нагружении. 2 ил.

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Изобретение относится к области измерительной техники и предназначено для использования при определении прочности бетонных и железобетонных конструкций. Сущность: осуществляют крепление прибора с заданием направления приложения нагрузки к скалывающему элементу под углом к поверхности участка измерения. Прикладывают нагрузку от силового цилиндра к скалывающему элементу с заданной скоростью до момента скола ребра. Фиксируют величину прикладываемого усилия и определяют прочность бетона. Усилие от силового цилиндра прикладывают непосредственно к скалывающему элементу, при этом заданное направление приложения нагрузки совмещено с осью силового цилиндра. Технический результат: повышение точности определения прочности бетона. 2 ил.

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СПОСОБ КРЕПЛЕНИЯ ОБРАЗЦОВ И УСТРОЙСТВО ДЛЯ ИСПЫТАНИЯ СОЕДИНЕНИЙ НА СРЕЗ

... 1. Способ крепления образцов при испытании сварных и паяных соединений на срез, включающий крепление накрестлежащих граней образца на посадочных местах пуансона и упора, отличающийся тем, что упор выполняют с возможностью поворота в плоскости сварки или пайки, посадочные места на пуансоне и упоре выполняют в виде прямоугольного отверстия, плоскость сопряжения пуансона и упора разделяют фольгой из многослойного материала, при этом плоскость образцов противоположные свариваемым, грани образцов, грани отверстий пуансона и упора покрывают легкоплавким металлом или его сплавом, смачивающим в расплавленном состоянии исследуемые металлы и их оксиды, и расширяющиеся при кристаллизации, а испытания проводят при температуре ниже температуры плавления легкоплавкого металла или сплава. 2. Устройство для испытания сварных и паяных соединений на срез, содержащее корпус с крышкой, помещенные в корпус пуансон и упор для крепления образцов, отличающееся тем, что корпус с крышкой выполнен в виде прямой призмы ...

СПОСОБ ИЗМЕРЕНИЯ СЦЕПЛЕНИЯ ПОКРЫТИЯ С ПОДЛОЖКОЙ

... 1. Способ измерения сцепления покрытия с подложкой, заключающийся в том, что посылают ультразвуковые волны посредством преобразователя к подложке и покрытию, собирают ряд эхо-сигналов, возникающих в результате отражений ультразвуковых волн на поверхностях подложки и покрытия, и вычисляют отношение амплитуд двух последовательных эхо-сигналов, причем упомянутое измерение выполняют в воздухе, а способ также заключается в том, что преобразователь прикладывают к подложке посредством тонкой пленки геля, вычисляют добротность покрытия, выраженную отношением между амплитудами эхо-сигналов, связанных с первыми двумя отражениями на границе раздела подложка/покрытие после прохождения через подложку или на границе раздела покрытие/воздух после прохождения через подложку и покрытие, и определяют сцепление покрытия исходя из функции корреляции между добротностью и механическим напряжением разрушения покрытия, полученным заранее путем механических испытаний на калибровочных испытательных образцов. 2.

СИЛОВАЯ РАМА ИСПЫТАТЕЛЬНОЙ МАШИНЫ

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Опора силоизмерительных устройств испытательных машин

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Устройство для испытания материалов на двухосное растяжение

Нагружающее устройство для испытаний материалов на ползучесть при растяжении совместно с кручением

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Машина для испытания на кручение образцов хрупких материалов

Устройство для улавливания частей разрушившегося образца

VERFAHREN ZUR BESTIMMUNG DER STRECKEIGENSCHAFTEN VON THERMOPLASTISCHEN ARTIKELN

Standard corrugated metal hose test procedure - applying torque in opposite rotational directions to length held between terminal mounts

To provide a standard comparison test of the bending behaviour of corrugated metal hose (1), the opposite ends of the length of hose are engaged in holders (7) which are then subjected to equal torques applied in opposite directions. The holders (7) are rotatably held at the heads of upright carrier columns (5) mounted in pivoted base supports (12) sepd. by an adjustable gap (D). A tensioning bar (8) held vertically at the centre line of the gap, and perpendicular to the central neutral line (4) of the extended hose, is hingedly attached to symmetrical shear arms (9) with upper pivotal attachments (11) to the carrier columns. The hose may be internally pressurised to reproduce certain load conditions. When the hose end carries connector fillings these are gripped in the holders (7).

Prüfstand für detonative Untersuchungen

Die Erfindung betrifft einen Prüfstand (1) für detonative Untersuchungen mit einem Schlittenturm (2) zur Aufnahme eines durch eine Detonation unterhalb des Schlittenturms (2) vertikal verlagerbaren Messschlittens (3), wobei eine Gewichtskraft (G) des Schlittenturms (2) mittels auf Druck beanspruchter Stützstreben (4) gegenüber einem Aufstellgrund (5) abgestützt ist.

Verfahren und Vorrichtung zur Feststellung der Spinnwertigkeit von Fasern

Zur Durchfuehrung des Kollektiv-Reissverfahrens nach Patent 1041278 dienende Zugkraft-Messvorrichtung

Friction and wear testing device

The testing device has a pair of shafts (3) supported by a bearing block at an adjustable radial spacing, each used for clamping a test body (1), with at least one of the shafts coupled to a rotary drive and a normal force exerted on the test bodies. The shafts have annular regions for loading the test bodies, positioned on either axial side of the latter, associated with rolling or sliding elements (4), moved radially relative to the shafts via holders and length adjustable coupling elements.

A SINGLE-AXIS OR MULTI-AXIAL APPARATUS FOR DYNAMIC TESTS ON LARGE STRUCTURES

Gewebepruefer

KLEBERPRUEFGERAET.

RHEOMETER MIT KRAFTMESSUNG IN AXIALER RICHTUNG

Verfahren und Vorrichtung zum Messen von Fadenspannungen und Fadendehnungen, insbesondere zum Ermitteln des Spannungs-Dehnungs-Zusammenhanges bei textilen Fasern oder Faeden

Zeitstandlebensdauer-Bewertungsverfahren

Verfahren zur Messung des Kriechens eines hohlzylindrischen Bauteils bei hoher Temperatur und hohem Innendruck und Verwendung des Verfahrens

Verfahren zur Messung des Kriechens eines hohlzylindrischen Bauteils bei hoher Temperatur und hohem Innendruck mit den Schritten, - auf dem zu überwachenden hohlzylindrischen Bauteil werden in axialer und in Umfangsrichtung Markierungen angebracht oder eine ausreichend charakteristische Oberflächentextur gesucht, - diese Markierungen oder die Oberflächentextur werden kontinuierlich optisch beobachtet und so die Entfernung zwischen bestimmten Punkten auf der Oberfläche kontinuierlich gemessen, - aus der gleichzeitig gemessenen Wandtemperatur und dem gemessenen Innendruck wird die dadurch bewirkte Änderung der Entfernung der beobachteten Punkte berechnet, wobei zur Erhöhung der Genauigkeit die berechneten Spannungsverteilungsverhältnisse in bestimmten Richtungen genutzt werden, wobei bei dem hohlzylindrischen Bauteil die Axialspannung die Hälfte der Spannung in Umfangsrichtung zufolge des Innendrucks ist, - aus der Differenz zwischen den gemessenen und berechneten Entfernungen wird das Kriechen ...

Einspannklemmen für Zugprüfgeräte

"VERFAHREN ZUM BESTIMMEN DER SCHLAGBRUCHZAEHIGKEIT K(PFEIL ABWAERTS)I(PFEIL ABWAERTS)(PFEIL ABWAERTS)D(PFEIL ABWAERTS) VON WERKSTOFFEN DURCH SCHLAGVERSUCHE"

Einrichtung zur Messung der Temperatur an Pruefmaschinen fuer in der Waerme unter Druckbelastung erweichende Koerper

Apparat und Verfahren zum Testen von Platten

Druckbehälter zur Prüfung von Proben

During testing, at least one sample element (25 to 28) is at the same time mechanically and thermally, as well as toxically or radioactively stressed. The pressure vessel (1) has a bottom (2) and a hood (4) which form a space (15) in which a sample stand (20) is arranged. The sample stand (20) may be secured to an intermediate ring (3) provided between the hood (4) and the bottom (2) in order to form an exchangeable module. Such a pressure vessel (1) allows samples to be tested in a nuclear power station; setting up a probe or exchanging probes is possible on site within a short period of time.

Зажим для испытания нитевидных образцов из микропластика

Задачей полезной модели является надежность закреплений большого количества образцов без передавливания в месте их выхода из зажима и без существенного изменения напряженно-деформированного состояния образца и разрезания жгута.Зажим для испытания нитевидных образцов из микропластика, состоящий из корпуса с пазом для размещения сменных зажимных элементов, неподвижного зажимного элемента, соединенного с корпусом, подвижного элемента, выполненного с возможностью перемещения в направляющих посредством зажимного винта, сменный зажимной элемент, состоящий из корпуса, по оси которого пропущен образец, закрепленный в нижней части посредством втулки, которая жестко укреплена и пропущена через отверстие в дне, края отверстия, соприкасающиеся с втулкой, выполнены сферическими. Корпус сменного зажимного элемента выполнен из двух половин, на поверхности каждой из которых, соприкасающейся с образцом, закреплена накладка из резины, покрытая фрикционным материалом, а неподвижный зажимной элемент, корпус сменного зажимного элемента и подвижный элемент выполнены в виде полусферы. 1 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 197 169 U1 (51) МПК G01N 3/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК G01N 3/04 (2019.08) (21)(22) Заявка: 2019120739, 01.07.2019 (24) Дата начала отсчета срока действия патента: Дата регистрации: 08.04.2020 (45) Опубликовано: 08.04.2020 Бюл. № 10 1 9 7 1 6 9 R U (73) Патентообладатель(и): ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ КАЗЕННОЕ ВОЕННОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ ВЫСШЕГО ОБРАЗОВАНИЯ Военная академия Ракетных войск стратегического назначения имени Петра Великого МИНИСТЕРСТВА ОБОРОНЫ РОССИЙСКОЙ ФЕДЕРАЦИИ (RU) (56) Список документов, цитированных в отчете о поиске: RU 80571 U1, 10.02.2009. SU 1008654 A1, 30.03.1983. SU 1749761 A1, 23.07.1992. EP 695820 A1, 07.02.1996. CN 101251455 B, 04.08.2010. (54) ЗАЖИМ ДЛЯ ИСПЫТАНИЯ НИТЕВИДНЫХ ОБРАЗЦОВ ИЗ МИКРОПЛАСТИКА (57) Реферат: Задачей полезной модели ...

Short Beam Shear Test Fixture

The test fixture includes a housing, a first grip, and a second grip. The first grip and the second grip are each configured to clamp onto an upper surface and lower surface of a material coupon. The test fixture also includes an upper input jaw and a lower input jaw each configured to clamp onto the material coupon near a center of the upper surface and the lower surface of the material coupon. The test fixture is configured to load the material coupon in a first direction and a second direction. The first grip and the second grip are each configured to clamp onto the material coupon at a location which accordingly results in a desired testing ratio regardless of a variation in thickness of the material coupon.

Testing device for testing rivets

A testing device for testing of rivets is provided. The testing device includes a first holding element and a second holding element that can be driven toward the first holding element to cooperatively define at least one hole on which at least one type of rivet can be installed. The second holding element also can be driven to separate from the first holding element to release the installed rivets for analyses.

Load Frame Assembly

A load frame assembly comprising a frame assembly, a servomotor, an actuator, a first crosshead assembly, a second crosshead assembly, a load frame and a displacement sensor. The servomotor is coupled to the frame and includes a control system. The actuator is coupled to the first crosshead assembly and provides for moving the first crosshead assembly relative to the frame assembly. The actuator comprises a ball screw assembly having a ball screw and a ball screw nut. The load frame is coupled to one of the crosshead assemblies. The displacement sensor is associated with the frame assembly and is configured to measure displacement by the crossheads relative to the frame assembly.

Apparatus for interfacing with a test specimen

The disclosure is directed at a system for applying a displacement, strain, stress or load to a test specimen. The system includes an interface manufactured from a deformable material which is connected to an actuator and to the test specimen. Application of a displacement by the actuator causes the test specimen to displace in multiple directions.

Test Fixture for Strip Samples

A test fixture for applying a prescribed displacement to a material includes a first and a second portion, a first and second adjustable pin, and an actuator. The first portion includes a first pin that engages the material at a first location on the material. A second pin engages the material at a second location on the material. A third pin engages the material at a third location on the material. The first adjustable pin holds the material against the second pin at the second location. The second adjustable pin holds the material against the third pin at the third location. The actuator is adapted to configure a relative position between the first pin and the second and third pins. 1. A test fixture for applying a prescribed displacement to a material , the test fixture comprising:a first portion including a first material engaging feature and a first support, the first material engaging feature having a supported end mounted to the first support, the first material engaging feature having a free end spaced from the supported end of the first material engaging feature, the first material engaging feature adapted to engage the material between the supported end and the free end of the first material engaging feature at a first location on the material;a second portion including a second material engaging feature, a third material engaging feature, and a second support, the second and the third material engaging features each having a supported end mounted to the second support, the second and the third material engaging features spaced from each other by a distance, the second and the third material engaging features each having a free end spaced from the supported ends of the second and the third material engaging features, the second material engaging feature adapted to engage the material between the supported end and the free end of the second material engaging feature at a second location on the material, and the third material engaging feature adapted to ...

CLAMPING DEVICE

A clamping device for clamping a flat material test sample while a material test is carried out is provided. The clamping device includes a substantially cylindrical clamping part, from the free end of which there extends a receiving slot for receiving the material test sample, a pressure ring surrounding the clamping part in the region of the receiving slot, and a pressure sleeve provided between the clamping part and the pressure ring, the pressure sleeve is formed and actuable such that, under radial expansion, it connects the clamping part and the pressure ring together and clamps the material test sample held in the receiving slot. 1. A clamping device for clamping a flat material test sample while a material test is carried out , comprising:a substantially cylindrical clamping part, from the free end of which there extends a receiving slot for receiving the material test sample;a pressure ring surrounding the clamping part in the region of the receiving slot; anda pressure sleeve provided between the clamping part and the pressure ring, the pressure sleeve is formed and actuable such that, under radial expansion, it connects the clamping part and the pressure ring together and clamps the material test sample held in the receiving slot.2. The clamping device as claimed in claim 1 ,wherein the receiving slot is widened at a slot base, andwherein the widening has a circular cross section.3. The clamping device as claimed in claim 2 , wherein the outside diameter of the clamping part has a groove in the region of the slot base of the receiving slot.4. The clamping device as claimed in claim 3 , wherein the outside diameter of the clamping part has two grooves located opposite one another claim 3 , which are arranged at the same distance from the receiving slot.5. The clamping device as claimed in claim 1 , wherein the clamping part has at its other free end a fastening section for arranging the clamping part on a material testing machine.6. The clamping device as ...

METHOD AND APPARATUS FOR TESTING LOAD-BEARING CAPACITY

In an embodiment, a hydraulic jack is provided having a first portion and a second portion. The first portion attached to a first section of a structure and the second portion attached to a second section of the structure. When a pressurized fluid is forced between the first portion and the second portion, a load is transferred to the first section and the second section by the pressure of the fluid on the first portion and the second portion. The first section and the second section are forced apart by the load, thus creating or enlarging at least one void in the structure. The pressurized fluid fills or partially fills one or more of the at least one void, thereby increasing the surface area effectively normal to the direction of the load in contact with the pressurized fluid. 1. A method of applying a load to a pile , comprising:locating a top portion below a top section of a pile, wherein the top portion is attached to the top section of the pile;locating a bottom portion below and proximate the top portion and above a bottom section of the pile, wherein the bottom portion is attached to the bottom section of the pile, wherein at least a portion of the cross-section of the top portion and at least a portion of the cross-section of the bottom portion is open before casting the pile, and wherein the top section of the pile and the bottom section of the pile are contiguous through the open portion of the cross-section of the top portion and the open portion of the cross-section of the bottom portion;injecting a pressurized fluid between the top portion and the bottom portion, wherein injecting the pressurized fluid between the top portion and the bottom portion causes the top portion and the bottom portion to be pushed apart, the top portion to push up on the top section of the pile with an initial upward force, the bottom portion to push down on the bottom section of the pile with an initial downward force, and at least one void to be created between the top ...

PART FATIGUE FRACTURE EVALUATING APPARATUS, PART FATIGUE FRACTURE EVALUATING METHOD, AND COMPUTER PROGRAM

There is derived an index FS (P) obtained by integrating the product of a probability distribution function f (√{square root over ( )}area) of an inclusion size √{square root over ( )}areaof a part and a “size S (P, √{square root over ( )}√{square root over ( )}area) of a region of the part” where a stress amplitude σ of an acting stress exceeds a stress amplitude σof a fatigue strength at each location in the case of a load being applied under a loading condition P set previously by an operator over the inclusion size √{square root over ( )}√{square root over ( )}areaof the part with the whole region of a range where a probability distribution of the inclusion size √{square root over ( )}areaexists set as an integral range. 1. A part fatigue fracture evaluating apparatus evaluating fatigue inside a machine part when being subjected to a repeated load , the part fatigue fracture evaluating apparatus comprising:a maximum size inclusion distribution function deriving means that inputs a plurality of values of an inclusion size, each being a value obtained by taking the square root of a cross-sectional area of an inclusion obtained by projecting the shape of, among inclusions existing inside the machine part, the maximum inclusion in a reference volume on a plane, or a value obtained by taking the square root of an estimated value of a cross-sectional area of an inclusion obtained from, in the case when among inclusions existing inside the machine part, the shape of the maximum inclusion in a reference volume is made to approximate a predetermined figure, a representative size of the figure, and based on the input plural inclusion sizes, derives a probability distribution function of the inclusion size with a maximum value distribution, of the inclusion size, in the machine part set to follow a generalized extreme value distribution;an estimated fatigue strength deriving means that inputs values of the inclusion size, hardness of the machine part or strength of a ...

NANOMECHANICAL TESTING SYSTEM

An automated testing system includes systems and methods to facilitate inline production testing of samples at a micro (multiple microns) or less scale with a mechanical testing instrument. In an example, the system includes a probe changing assembly for coupling and decoupling a probe of the instrument. The probe changing assembly includes a probe change unit configured to grasp one of a plurality of probes in a probe magazine and couple one of the probes with an instrument probe receptacle. An actuator is coupled with the probe change unit, and the actuator is configured to move and align the probe change unit with the probe magazine and the instrument probe receptacle. In another example, the automated testing system includes a multiple degree of freedom stage for aligning a sample testing location with the instrument. The stage includes a sample stage and a stage actuator assembly including translational and rotational actuators. 148-. (canceled)49. A testing system including a probe changing assembly for coupling and decoupling a probe of a mechanical testing instrument configured for mechanical testing at micron or less scale , the probe changing assembly comprising:a probe magazine housing a plurality of probes, the probes are configured for mechanical testing at micron scale or less; grasp one of the plurality of probes housed in the probe magazine,', 'couple one of the plurality of probes with a probe receptacle of a mechanical testing instrument, and', 'decouple one of the plurality of probes from the probe receptacle of the mechanical testing instrument; and, 'at least one probe change unit configured toan actuator coupled with the at least one probe change unit, and the actuator is configured to move and align the at least one probe change unit with the probe magazine and the probe receptacle of the mechanical testing instrument.50. (canceled)51. The testing system including the probe changing assembly of claim 49 , wherein the actuator includes a ...

Self-Aligning Test Weight

The present invention relates to test weights for testing the load capacity of a crane. More specifically, the present invention provides a novel system and approach simple and efficient crane load testing using solid weights. Previous methods of testing crane load capacity often require significant time to configure and reconfigure the apparatus. The system of the present invention increases efficiency by significantly reducing this configuration time. The system comprises a plurality of stackable test weights, and a lifting fixture specifically designed for the system. A cantilever structure located on two opposing sides of the test weight enables the lifting fixture to first be quickly secured underneath of said structure, and then lift that particular unit as well as any units surmounting that unit. A novel block lock system integrated into each weight unit enables self-alignment and securing of each weight as it is placed onto the weight stack.

MEASUREMENT DEVICE FOR THE MEASUREMENT OF FORCES IN STRUCTURAL COMPONENTS

A measurement device for measurement of forces in structural components, having a measurement sensor, which is embodied such that it is connected with the structural component in a force-fit and/or form-fit manner, and generates measurement signals as a function of force transfers in the structural component, the measurement device having a measurement casing upon the measurement sensor. Processing of received measurement signals can occur, and the measurement casing has connecting means, for placing in position and releasable attachment of the measurement casing on the structural component, and the contacting means of the measurement casing can establish contact with the measurement sensor for the reception of the measurement signals. 1. A measurement device for the measurement of forces in structural components , comprising:a measurement sensor, which is embodied such that it is connected in a force-fit and/or form-fit manner with the structural component and generates measurement signals as a function of force transfers in the structural component,a measurement casing placed upon the measurement sensor, which has contacting means for establishing contact between the measurement sensor and the structural component, so as to receive the measurement signals generated by the measurement sensor, and further processing means for the further processing of the received measurement signals, wherein the measurement casing has connecting means, which are embodied for purposes of positioning and releasable attachment of the measurement casing on the structural component, wherein by means of the releasable attachment using the contacting means the contacting means of the measurement casing establish contact with the measurement sensor for the reception of the measurement signals.2. The measurement device in accordance with claim 1 , wherein the contacting means are designed for a wireless transfer of the measurement signals from the measurement sensor to the measurement ...

APPARATUS AND METHOD FOR IN SITU TESTING OF MICROSCALE AND NANOSCALE SAMPLES

According to example embodiments of the invention, a microscale testing stage comprises a frame having first and second opposing ends and first and second side beams, at least one deformable force sensor beam, a first longitudinal beam having a free end, a second longitudinal beam having a facing free end, a support structure, and a pair of slots disposed at each of the free ends. In certain embodiments, a layer of a conductive material defines first and second conductive paths and an open circuit that can be closed by the specimen across the gap. In other embodiments, the stage is formed of a high melting temperature material. 1. A microscale testing stage comprising:a frame having first and second opposing ends and first and second side beams;at least one deformable force sensor beam near the first end extending laterally across said frame between the first and second side beams;a first longitudinal beam bisecting said at least one force sensor beam and having a free end;a second longitudinal beam having a free end facing the free end of said first longitudinal beam to define a gap therebetween;a support structure disposed near the second end;a pair of slots disposed at each of the free ends of the first and second longitudinal beams, respectively, each of the slots providing a seat for an end of a separately fabricated microscale or nanoscale specimen; anda conductive layer of a conductive material disposed on or in said stage, said conductive layer defining a first conductive path through at least a portion of the stage from a first contact on the frame to one of the slots and a second conductive path through at least another portion of the stage from a second contact on the stage to the other of the slots;wherein said conductive layer defines an open circuit when the gap is open;whereby the specimen closes the circuit across the gap when placed into said pair of slots.2. The testing stage of claim 1 , wherein the stage further comprises a pair of opposed ...

VISCOELASTICITY MEASURING APPARATUS

A viscoelasticity measuring apparatus that measures viscoelasticity of a measurement target with high precision is provided. The measuring apparatus includes: a casing; a surface contact part provided in the casing and brought into surface contact with skin; a ball indenter that moves toward the skin more than the surface contact part and is pushed into the skin; a driving unit that supports the ball indenter and moves the ball indenter toward the skin; a load cell whose right end side is fixed to the casing and left end side supports the driving unit, the load cell detecting a pushing load that pushes the ball indenter into the skin; and a control unit that obtains displacement of the ball indenter. 1. A viscoelasticity measuring apparatus comprising:a casing;a surface contact part provided in the casing and brought into surface contact with a measurement target;an indenter that moves toward the measurement target over the surface contact part and is pushed into the measurement target;a driving unit that supports the indenter and moves the indenter toward the measurement target;a load detecting unit of which a fixed part side is fixed to the casing and a movable part side supports the driving unit, wherein the load detecting unit detects a pushing load that pushes the indenter into the measurement target;a displacement obtaining unit that obtains displacement of the indenter;an inclination detecting unit for detecting inclination of a detecting direction of the load detecting unit; anda control unit, whereinthe control unit corrects a detection reference point of the load detecting unit by correcting an amount corresponding to the inclination of the detecting direction detected by the inclination detecting unit with respect to output of load detecting unit.2. The viscoelasticity measuring apparatus according to claim 1 , wherein:the inclination detecting unit detects the detecting direction by detecting acceleration; andthe control unit corrects the detection ...

SAMPLE FOR ELECTRON MICROSCOPY AND METHOD OF MANUFACTURING THE SAME

A sample for electron microscopy includes a base member and a sensor. The sensor is configured to measure data on the sample. The sensor includes an insulating member and a measuring element. The insulating member is deposited in or near an area of observation that is defined on a surface of the base member. The measuring element is deposited on a surface of the insulating member or over the surface of the base member and the surface of the insulating member. 1. A sample for electron microscopy , comprising:a base member; and an insulating member deposited in or near an area of observation that is defined on a surface of the base member; and', 'a measuring element deposited on a surface of the insulating member, or over the surface of the base member and the surface of the insulating member., 'a sensor configured to measure data on the sample, the sensor comprising2. The sample for electron microscopy according to claim 1 , wherein the insulating member is made of ceramic or glass.3. The sample for electron microscopy according to claim 1 , further comprising:a terminal device through which a measurement signal generated by the measuring element is extracted to an outside, an insulating member deposited on the surface of the base member, and', 'a terminal element deposited on the surface of the insulating member., 'wherein the terminal device includes'}4. The sample for electron microscopy according to claim 1 , further comprising:a terminal device through which a measurement signal generated by the measuring element is extracted to an outside,wherein the terminal device includes a terminal element attached to a sample holder to hold the sample when observation through the electron microscope is conducted.5. The sample for electron microscopy according to claim 1 ,wherein the sensor comprises a stress sensor configured to measure a stress occurring in the sample,wherein the insulating member includes a portion that is free of the measuring element, anda recess- ...

DEVICE FOR MEASURING STRAIN IN A COMPONENT

Disclosed is an apparatus and method for measuring the diametral change in a cylindrical component by monitoring and measuring bending (compression and tension) effected by the diametral change in a plane perpendicular to the diameter of the cylindrical component. The apparatus for effecting the method comprises at least one web, but typically two webs, defining planes perpendicular to the diameter of the cylindrical component and strain measuring elements mounted on the web planes and arranged to sense and measure the compressive and tensile (bending) action of the strain-gauge-mounted webs. 1. A method of measuring a load on a cylindrical component , comprising:(a) mounting at least two strain sensing elements to the cylindrical component;(b) applying a load to the cylindrical component;(c) simultaneously sensing a substantially pure tensile strain at a first of the strain sensing elements and a substantially pure compressive strain at a second of the strain sensing elements in response to a diametral change in the cylindrical component as effected by the load; and(d) converting the sensed strains to a value equal to the load applied to the shaft.2. The method as claimed in claim 1 , prior to step (a) attaching the strain sensing elements to a respective inner web and outer web of a frame.3. The method as claimed in claim 2 , further comprising the step of mounting the frame to the cylindrical component.4. The method as claimed in claim 3 , further comprising the step of measuring a compressive strain at the strain sensing element attached to the outer web and measuring a tensile strain at the strain sensing element attached to the inner web. This application is a divisional of U.S. patent application Ser. No. 12/982,095, filed Dec. 30, 2010, which application claims the benefit of the filing date of U.S. provisional application No. 61/335,149, filed Dec. 31, 2009.The entire disclosures of U.S. patent application Ser. No. 12/982,095, filed on Dec. 30, 2010; and U. ...

Sample Holder For Receiving a Sample

A sample holder for receiving a sample includes a sample receiving device for clamping the sample, which is assigned a holding means which has at least two prongs protruding from the sample receiving device for a gripping means. Also disclosed are a receiving device, a sample holder magazine, a sample feeding system, a clamping device and an examining device.

TEST METHOD, TEST RIGS AND CONTROL SYSTEM

A method for load relieving a test object, wherein a load is applied by a multiplicity of hydraulic devices positioned side by side each introducing a partial load into the test object such that the test object has a minimum deflection in an area close to its fixation and a maximum deflection in an area far away from the fixation, wherein the load is reduced sequentially from the maximum deflection to the minimum deflection. A test rig is provided that enables an autonomous and non-synchronical load relief of a test object based on pressure difference. A test rig is provided that enables an autonomous and non-synchronical load relief of a test object based on a delay time and a control system for such test rigs. 1. A method for load relieving a test object , wherein a load is applied by a multiplicity of hydraulic means positioned side by side , each introducing a partial load into the test object such that the test object has a minimum deflection in an area close to its fixation and a maximum deflection in an area far away from the fixation , comprising the step of reducing the load sequentially from the maximum deflection to the minimum deflection.2. The method according to claim 1 , including the step of resetting a hydraulic means close to a clamping device as a function of a pressure difference of an adjacent hydraulic means far away from the clamping device.3. The method according to claim 2 , wherein the pressure difference is measured hydraulically.4. The method according to claim 2 , wherein the pressure difference is measured electronically.5. The method according to claim 1 , wherein the hydraulic means are reset sequentially after a delay time.6. A test rig for load testing a test object claim 1 , comprising:a clamping device for fixing the test object,a multiplicity of hydraulic means positioned side by side for each introducing a partial load into the test object, andat least one control system for measuring a pressure difference between pressure ...

METHOD FOR DIAGNOSING ABRASION OF ELECTRIC OIL PUMP ROTOR

A method for diagnosing abrasion of an electric oil pump rotor includes sensing a driving duty of an oil pump control unit, and determining whether the sensed driving duty of the oil pump control unit is below a set reference value, wherein as a result of the determining, when the driving duty of the oil pump control unit is below the set reference value, it is determined that the electric oil pump rotor is in a worn out state. 1. A method for diagnosing abrasion of an electric oil pump rotor , comprising:diagnosing the electric oil pump rotor using a driving duty of the oil pump control unit, sensing, by a controller, a driving duty of an oil pump control unit;', 'determining, by the controller, whether the sensed driving duty of the oil pump control unit is below a set reference value; and', 'determining, by the controller, the electric oil pump rotor is in a worn out state, when the sensed driving duty of the oil pump control unit is below the set reference value., 'wherein the diagnosing includes2. The method of claim 1 , wherein the diagnosing further includes: outputting claim 1 , by the controller claim 1 , a warning signal claim 1 , when the driving duty of the oil pump control unit is below the set reference value.3. The method of claim 1 , further comprising:confirming, by the controller, whether it is possible to perform the diagnosing before the diagnosing sensing,wherein as a result of the confirming, when it is possible to perform the diagnosing, the sensing is performed.4. The method of claim 3 , wherein the confirming includes determining whether a voltage inputted into the oil pump control unit is included in a preset region claim 3 , and the diagnosing is not performed when the voltage is not included in the preset region.5. The method of claim 3 , wherein claim 3 , the confirming includes determining whether a temperature of an automatic transmission fluid is below a predetermined temperature claim 3 , and the diagnosing is not performed when the ...

Instrument for measuring the intrinsic strength of polymeric materials via cutting

A testing instrument and method for measuring the intrinsic strength of polymeric materials via cutting includes a pair of mechanical clamps connected at a base to low-friction hinges. The clamps are configured to secure the elongate edges of a polymer specimen, and to periodically load the specimen to a predetermined strain. The load on the specimen while strained is measured with an opening force load sensor. While in the strained condition, the specimen is cut with a highly sharpened blade, and the cutting force also measured by a cutting force load sensor. A cutting energy curve may be plotted from these measurements, from which a cutting energy can further be derived. The cutting energy is compared to a control material with a known cutting energy and intrinsic strength. The cutting energy and intrinsic strength being linearly proportional, the cutting energy for the specimen may thereby be determined.

TENSION AND COMPRESSION TESTER FOR FRACTURE STRESS TEST OF COMPACT PIPE SAMPLE

A tension and compression tester for a fracture stress test of a compact pipe sample having a crack portion formed thereon, comprises: a pair of holders each of which is configured to surround both ends of the compact pipe sample respectively such that the crack portion is interposed between both ends of the compact pipe; fixing portions each of which is disposed between the compact pipe sample and the holder to enhance fastening between the compact pipe sample and the holder; levers each of which is connected with the fixing portion and the holder to deliver tension or bending to the compact pipe sample; and separation preventing portions for fixing both ends of the holder and the lever with each other to prevent separation of the lever and the holder. Accordingly, the tester can conduct both tension and compression tests, while easily applying loads on the sample during the test. 1. A tension and compression tester for a fracture stress test of a compact pipe sample having a crack portion formed thereon , comprising:a pair of holders each of which is configured to surround both ends of the compact pipe sample respectively such that the crack portion is interposed between the both ends of the compact pipe;fixing portions each of which is disposed between the compact pipe sample and the holder to enhance fastening between the compact pipe sample and the holder;levers each of which is connected with the fixing portion and the holder to deliver tension or bending to the compact pipe sample; andseparation preventing portions for fixing both ends of the holder and the lever with each other to prevent separation of the lever and the holder.2. The tension and compression tester for a fracture stress test of a compact pipe sample of claim 1 , wherein each of the separation preventing portions comprises:a first separation preventing portion for preventing separation of the lever and one end of the holder when the tension is applied on the compact pipe sample; anda second ...

LABORATORY DEVICE AND METHOD FOR SIMULATING CEMENT SHEATH CONSOLIDATION IN FROZEN SOIL STRATA

A laboratory device for simulating the cement sheath consolidation in the frozen soil strata includes the main body, the pressure system and the measuring system. The main body includes the fixing plate, the detachable plate and the base plate. The circular hole is provided in the center of the base. The central column or the heat insulating casing is mounted on the base through the circular hole. The fixing plate, the detachable plate, the base plate and the central column or the heat insulating casing form a cavity for preparing the core and the cement sheath. During use, the device is placed in a low temperature context, and then the frozen soil core with a hollow cylinder can be artificially fabricated. Further, the heat insulating casing holder is placed, and the cement is added to simulate the state of the cement sheath consolidation under the actual strata conditions. 1. A laboratory device for simulating a cement sheath consolidation in frozen soil strata , comprising: a main body , a pressure system and a measuring system; whereinthe main body comprises fixing plates, detachable plates and a base plate; a circular hole is provided in a center of a base holder; a central column or a heat insulating casing is mounted on the base through the circular hole; a cavity for preparing a core and a cement sheath is formed by the fixing plates, the detachable plates, the base plate and the central column or the heat insulating casing; the detachable plate comprises limiting plates and pressure transmitting plates;the pressure system comprises an axial pressure pressurizing device and confining pressure pressurizing devices, the axial pressure pressurizing device is located above the cavity, and the confining pressure pressurizing devices are located outside the detachable plates; andthe measuring system comprises acoustic wave transmitters, acoustic wave receivers, temperature sensors and strain gauges, the measuring system is connected to a controller; the acoustic ...

VERTICAL COUNTERFORCE LOADING DEVICE FOR LARGE-TONNAGE SOIL MATERIAL LOAD TEST AND LOADING METHOD THEREOF

The vertical counterforce loading device includes a concrete support member, four transfer components, four connection components, a vertical force transmission component and a load test soil layer. The concrete support member is formed by pouring and concreting below the load test soil layer. The four transfer components are divided into two groups to be symmetrically and parallelly anchored in the concrete support member. The vertical force transmission component includes a load plate, a jack, a primary beam and a secondary beam arranged in sequence from bottom to top. The load plate is installed on the load test soil layer. The number of the secondary beams is two, and the two secondary beams are connected crosswise to both ends of the primary beam. The end portions of the two secondary beams are respectively connected to second ends of the four connection components through reinforcement components. 1. A vertical counterforce loading device for a large-tonnage soil material load test , comprising a concrete support member , four transfer components , four connection components , a vertical force transmission component and a load test soil layer , whereinthe concrete support member is formed by pouring and concreting below the load test soil layer;the four transfer components are divided into two groups to be symmetrically and parallelly anchored in the concrete support member;a first end of a connection component of the four connection components is connected to a transfer component of the transfer components, and a second end of the connection component of the four connection components is connected to the vertical force transmission component; andthe vertical force transmission component comprises a load plate, a jack, a primary beam and two secondary beams, wherein the load plate, the jack, the primary beam and the two secondary beams are arranged in sequence from bottom to top, the load plate is installed on the load test soil layer, the two secondary beams ...

METHOD AND APPARATUS FOR TESTING LOAD-BEARING CAPACITY

In an embodiment, a hydraulic jack is provided having a first portion and a second portion. The first portion attached to a first section of a structure and the second portion attached to a second section of the structure. When a pressurized fluid is forced between the first portion and the second portion, a load is transferred to the first section and the second section by the pressure of the fluid on the first portion and the second portion. The first section and the second section are forced apart by the load, thus creating or enlarging at least one void in the structure. The pressurized fluid fills or partially fills one or more of the at least one void, thereby increasing the surface area effectively normal to the direction of the load in contact with the pressurized fluid. 1. A method of applying a load to a pile , comprising:locating a top portion below a top section of a pile, wherein the top portion is attached to the top section of the pile;locating a bottom portion below and proximate the top portion and above a bottom section of the pile, wherein the bottom portion is attached to the bottom section of the pile, wherein at least a portion of the cross-section of the top portion and at least a portion of the cross-section of the bottom portion is open, and wherein the top section of the pile and the bottom section of the pile are contiguous through the open portion of the cross-section of the top portion and the open portion of the cross-section of the bottom portion;injecting a fluid between the top portion and the bottom portion, such that the top portion and the bottom portion are pushed apart, the top portion pushes up on the top section of the pile, the bottom portion pushes down on the bottom section of the pile, and at least one void is created between the top section of the pile and the bottom section of the pile in a portion of the pile extending through the open portion of the cross-section of the top portion and the open portion of the cross- ...

Test piece, test method, wind turbine generator system

The invention relates to a test piece for determining a specific material property of a fiber-reinforced plastic composite under applied mechanical loading. 1. A test piece for determining a specific material property of a fiber-reinforced plastic composite under applied mechanical loading , the test piece comprisingan inner core incorporated in a composite with the fiber-reinforced plastic composite, the inner core being widened in a transverse axis in relation to the applied mechanical load in such a way that the composite with the inner core has a greater buckling stability than the composite without the inner core, and wherein the inner core is formed in such a way that an influence on the specific material property to be determined of the fiber-reinforced plastic composite lies in a range of acceptance.2. The test piece as claimed in claim 1 , wherein the inner core forming an inner layer of a layer system.3. The test piece as claimed in claim 1 , wherein the inner core comprising an expanded plastic with filler material.4. The test piece as claimed in claim 1 , wherein the test piece can be described by a substantially rectangular claim 1 , elongate geometry and has outer dimensions of at least 0.5 cm in thickness claim 1 , at least 2 cm in width and at least 20 cm in length.5. The test piece as claimed in further comprising ends tapering to a surface area and adapted to fit into a fixing device.6. The test piece as claimed in claim 1 , further comprising an outer surface and at least one strain gage located on the outer surface.7. The test piece as claimed in claim 1 , wherein mechanical loads are applied to the test piece corresponding to at least one of tensile loading and compressive loading.8. The test piece as claimed in claim 7 , wherein the mechanical loads corresponding to dynamic loading.9. A method of testing a test piece as claimed in claim 1 , the method comprising:clamping a first end of the test piece in a first fixing device of a test stand; ...

BOND TESTING MACHINE AND CARTRIDGE FOR A BOND TESTING MACHINE COMPRISING A PLURALITY OF TEST TOOLS

A cartridge suitable for use in a bond testing machine includes a plurality of a different test tools. A rotary mechanism is provided and each of the plurality of different test tools is mounted to the rotary mechanism angularly spaced from one another. A drive unit is coupled to the rotary mechanism and is configured to rotate the rotary mechanism to move each of the plurality of different test tools to and from a use position. An air interface receives compressed air from a corresponding air interface on a positioning assembly of the bond testing machine. 1. A cartridge configured to be removably coupled to a moving assembly of a bond testing machine , the cartridge comprising:a plurality of a different test tool assemblies;a rotary mechanism, each of the plurality of different test tool assemblies mounted to the rotary mechanism angularly spaced from one another;a drive unit, coupled to the rotary mechanism, the drive unit configured to rotate the rotary mechanism to move each of the plurality of different test tool assemblies to and from a use position; andan air interface for receiving compressed air from a corresponding air interface on the moving assembly of the bond testing machine.2. A cartridge according to claim 1 , wherein the rotary mechanism includes a Geneva drive mechanism having a drive wheel and a driven wheel claim 1 , wherein constant rotation of the drive wheel causes intermittent rotation of the driven wheel.3. A cartridge according to claim 2 , wherein the driven wheel is movable between a plurality of use positions claim 2 , and the drive wheel is configured to move the driven wheel claim 2 , wherein a least one resilient element is in frictional engagement between the driven wheel and the drive wheel and wherein said resilient element is configured to restrain movement of the driven wheel out of one of the plurality of use positions when the drive wheel is stationary.4. A cartridge according to claim 1 , further comprising control circuitry ...

ELECTRONICS BENDING FIXTURE DESIGN

Methods, devices, and systems for testing the flexibility of a sample such as an electronic device are provided herein. A testing system can have a motor operably connected to a mandrel such that the motor causes the mandrel to accurately and precisely rotate and cause the sample to conform to an outer surface of the mandrel. Moreover, a proximal end of the sample is secured to the outer surface of the mandrel, and the opposing distal end is controlled by a retractable holder such that the entire sample is subjected to a constant bend radius as the mandrel rotates. Other aspects and features such as controlling the environment around the mandrel and securing small samples to the mandrel are also described herein. 1. A testing system for a flexible sample , comprising:a motor that rotates a mandrel in a first direction about a longitudinal axis and in an opposing second direction, wherein a first portion of the mandrel has a first radius from the longitudinal axis to an outer surface of the mandrel, and a second portion of the mandrel has a second radius from the longitudinal axis to the outer surface of the mandrel, wherein the second radius is distinct from the first radius;a sample holder positioned on an outer surface of the mandrel, wherein the sample holder is configured to secure a sample to the first portion of the mandrel; anda retractable holder having a distal end that is biased toward the first portion of the mandrel such that the distal end contacts the sample with a predetermined force, wherein the retractable holder is configured to conform the sample to the outer surface of the mandrel as the mandrel rotates.2. The testing system of claim 1 , further comprising:a sample carrier extending between a first end and a second end, wherein the sample holder secures the first end of the sample carrier to the first portion of the mandrel; anda first flexible layer and a second flexible layer of the sample carrier that define a space therebetween configured to ...

CONCRETE TEMPERATURE STRESS TESTING MACHINE SYSTEM AND CONCRETE TEMPERATURE STRESS TESTING METHOD

A concrete temperature stress testing machine system including: a concrete temperature stress testing machine and a walk-in environment simulation laboratory system; and the walk-in environment simulation laboratory system includes a walk-in environment simulation laboratory, a host control cabinet, a compressor set room, an environment room control cabinet and a computer. The concrete temperature stress testing machine achieves the temperature deformation self-compensation by using the combination of different proportions of invar and No. 45 steel, an embedded type directly measuring deformation technology of the concrete temperature stress testing is achieved by the fit between the upper and side embedded parts, the embedded rod and the extending rod. The concrete temperature stress testing machine system according to embodiments of the present disclosure may compensate the impact of the temperature deformation by itself and directly measure the true deformation of concrete, thereby having high accuracy, good long-term stability, easy operation and other advantages. 1. A concrete temperature stress testing machine system comprising a concrete temperature stress testing machine and a walk-in environment simulation laboratory system , wherein the concrete temperature stress testing machine is disposed within the walk-in environment simulation laboratory system , wherein ,the walk-in environment simulation laboratory system comprises an outer laboratory, a walk-in environment simulation laboratory disposed in the outer laboratory, and a host control cabinet, a compressor set room, an environment room control cabinet and a computer disposed between the outer laboratory and the walk-in environment simulation laboratory;a plurality of concrete temperature stress testing machines are arranged in the walk-in environment simulation laboratory at the same time;the environment room control cabinet is provided with an environment simulation control unit therein, and the ...

Electroluminescent Methods And System For Real-Time Measurements Of Physical Properties

Methods of producing luminescence by application of a time-varying electrical signal to an electroluminescent device are disclosed whereby the entire system remains at open circuit. At least one article, substance or material, the “object”, is employed to alter the electrical signal to the area of the electroluminescent device to a level sufficient to change light emission. Methods are disclosed to relate the light intensity thus produced to a property of the object thereby allowing a measurement of the property. The method may optionally use one or more additional circuit components. 1. An electroluminescent method for measuring a physical property of an object comprising:a. transmitting a time-varying electrical signal from a power source to a first terminal of an electroluminescent device, wherein the electroluminescent device remains at open circuit in relation to the power source;b. positioning an object in close proximity to the electroluminescent device while the time-varying electrical signal is transmitted to the electroluminescent device, such that the physical property of the object alters the time-varying electrical signal across the electroluminescent device and thereby changes electromagnetic radiation emitted by the electroluminescent device;c. measuring the change in electromagnetic radiation emitted by the electroluminescent device; andd. relating the measured change in electromagnetic radiation to the physical property of the object.2. The method of wherein more than one physical property is measured.3. The method of wherein more than one time-varying electrical signal is used.4. The method of wherein more than one electroluminescent device is used.5. The method of wherein the object is separated from the electroluminescent device by a dielectric material.6. The method of wherein the electroluminescent device has more than two terminals.7. The method of is coupled with a closed-circuit electroluminescent method.8. The method of wherein the physical ...

Method and Apparatus for Direct-Acting Wide Frequency Range Dynamic Mechanical Analysis of Materials

An improved method and apparatus for direct-acting dynamic mechanical analysis that accomodates sample distortion due to environmental (e.g., temperature) variation.

Apparatus and methods for testing components under force

An apparatus and methods for testing components under force is described herein. The apparatus comprises cap bolts that may be tightened to exert a measurable, constant force upon a lever arm that rotates about a fulcrum. The lever arm pushes down upon a push rod, to exert a force upon a test piece in an insertion well, which may be filled with fluid. The fulcrum may be positioned, such that the force from the cap bolt gives a magnifying, or a diluting force, upon the push rod.

REAL-TIME STRUCTURAL DAMAGE DETECTION BY CONVOLUTIONAL NEURAL NETWORKS

Certain embodiments may generally relate to structural damage detection. An embodiment may be directed to method for identifying a presence and a location of structural damage. Such method may include training a convolutional neural network (CNN) for a joint of a structure, sending instructions to a modal shaker to induce an input to the structure, receiving, as a result of the induced input, a raw acceleration signal at the joint, computing, based on the trained CNN and the raw acceleration signal, an index value of the joint, and identifying, according to the index value, a presence of a location of structural damage of the structure. In a further embodiment, the index value represents a likelihood of damage at the joint. 1. A method for identifying a presence and a location of structural damage , comprising:training a convolutional neural network (CNN) for a joint of a structure;sending instructions to a modal shaker to induce an input to the structure;receiving, as a result of the induced input, a raw acceleration signal at the joint;computing, based on the trained CNN and the raw acceleration signal, an index value of the joint; andidentifying, according to the index value, a presence of a location of structural damage of the structure,wherein the index value represents a likelihood of damage at the joint.2. The method of claim 1 , wherein the computing of the index value comprises:{'sub': 's', 'dividing the acceleration signal to a number of frames that each include a total number of nsamples;'}normalizing the frames between −1 to 1;feeding the normalized frames measured at the joint to the CNN; anddetermining a probability of damage (PoD) at the joint by dividing a number of frames classified s damaged by a total number of frames processed by the CNN.3. The method of claim 2 , wherein a high PoD value within a range of about 0.8 to about 1.0 provides an indication that the joint is likely to be damaged claim 2 , and a low PoD value within a range of about 0.0 ...

DEVICE FOR TESTING A CERAMIC SOCKET INSERT FOR HIP JOINT IMPLANTS

The invention relates to a device for testing a ceramic socket insert for hip joint implants having a receiving device, a pressure piece and optionally having a plunger, wherein the receiving device has a recess with a positioning region for receiving the socket insert and the recess has a receiving cone in the positioning region. According to the invention, in order for the device to be universally applicable to all socket inserts (monolithic, modular, pre-joined) and therefore replace all current devices, an annular ductile adapter piece having a conical outer surface contacting the receiving cone and an inner surface contacting the socket insert is arranged in the positioning region between the receiving device and the socket insert, wherein the friction between the receiving device and adapter piece is lower than between the adapter piece and socket insert. 18.-. (canceled)9. A device for testing a ceramic socket insert of hip joint implants comprising:a holding fixture; anda pressure piece;wherein the holding fixture comprises a recess having a positioning region for uptake of the socket insert; andwherein the recess in the positioning region has a receiving cone;wherein in the positioning region between the holding fixture and the socket insert there is disposed an annular, ductile adaptor piece with a conical outer surface, which abuts the receiving cone and an inner surface which abuts the socket insert, wherein the friction between holding fixture and adaptor piece is less than between adaptor piece and socket insert.10. A device according to claim 9 , wherein the receiving cone is polished at least in the positioning area.11. A device according to claim 9 , wherein the adaptor piece is made of brass.12. A device according to claim 9 , wherein the holding fixture consists of surface-hardened steel.13. A device according to claim 9 , wherein between the conical outer surface of the adaptor piece and the receiving cone of the recess and/or between the inner ...

Apparatus, System and Method for Compression Testing of Test Specimens

There is provided an apparatus for compression testing. The apparatus has a base assembly having an end load element attached to the base assembly, the base assembly being rigid. The apparatus has a support assembly attached to the base assembly, and having a plurality of window portions. The apparatus has a core assembly installed within the support assembly, the core assembly being crushable and configured to protect the support assembly and the base assembly from fracture loads generated during compression testing. The base assembly, the support assembly, and the core assembly together form an apparatus for compression testing of a test specimen having a notch portion. The apparatus is configured for use with an optical strain measurement system. When the test specimen is installed in the support assembly, the test specimen and the notch portion are visible to the optical strain measurement system through the plurality of window portions.

Large Sample Testing Device, Method, and System

The present invention includes a load frame test device using a plurality of levers about a common pivot point for applying combinations of tensile loading and bending on test articles at magnitudes seen in offshore applications. 1. A method for testing an article comprising:a means for coupling the first end of the tubular;a means for coupling the second end of the tubular;a means for applying a first force;a means for applying a second force;a means for converting the first force into a third force;a means for converting the second force into a fourth force;a means for converting the third force into a tensile stress in the tubular; anda means for converting the fourth force into a bending moment in the tubular.2. The method of claim 1 , wherein the means for coupling the first end of the tubular is a split clamp.328. The method of claim claim 1 , wherein the means for coupling the second end of the tubular is a split clamp.4. The method of claim 1 , wherein the means for applying a first force comprises pressurizing a first hydraulic fluid.5. The method of claim 1 , wherein the means for applying a second force comprises pressurizing a second hydraulic fluid.6. The method of claim 1 , wherein the means for converting the first force into a third force includes a first lever.7. The method of claim 1 , wherein the means for converting the second force into a fourth force includes a second lever.8. The method of claim 1 , wherein the means for converting the third force into an axial load includes rotating the third force.9. The method of claim 1 , wherein the means for converting the fourth force into a bending moment includes applying the fourth force a distance away from the test article.10. A method of applying a bending moment to a test article claim 1 , the method comprising:applying a bending moment to the test article, wherein a compression force is applied to the test article, andapplying an axial load to the text article, wherein said axial load at least ...

SHEAR BOX FOR TESTING CYCLIC SHEAR CHARACTERISTICS OF A ROCK MASS DISCONTINUITY

A shear box for testing cyclic shear characteristics of a rock mass discontinuity includes: an upper shear box including an upper semi-open cavity composed of an upper left side plate, an upper right side plate, an upper front side plate, an upper rear side plate and an upper top plate; and a lower shear box including a lower semi-open cavity composed of a lower left side plate, a lower right side plate, a lower front side plate, a lower rear side plate and a lower bottom plate; the upper shear box includes at least one first adjusting device for adjusting a space size of the upper semi-open cavity; the lower shear box includes at least one second adjusting device for adjusting a space size of the lower semi-open cavity; and the upper shear box and the lower shear box are placed opposite to each other. 1. A shear box for testing cyclic shear characteristics of a rock mass discontinuity , comprising:an upper shear box, wherein the upper shear box comprises an upper semi-open cavity composed of an upper left side plate, an upper right side plate, an upper front side plate, an upper rear side plate, and an upper top plate; anda lower shear box, wherein the lower shear box comprises a lower semi-open cavity composed of a lower left side plate, a lower right side plate, a lower front side plate, a lower rear side plate and a lower bottom plate;wherein, the upper shear box further comprises at least one first adjusting device for adjusting a space size of the upper semi-open cavity; the lower shear box further comprises at least one second adjusting device for adjusting a space size of the lower semi-open cavity; the upper shear box and the lower shear box are placed opposite to each other, the upper semi-open cavity and the lower semi-open cavity form an accommodating cavity for placing a rock mass to be tested; the at least one first adjusting device comprises a first upper isosceles trapezoid, a first lower isosceles trapezoid, a first left isosceles trapezoid, and a ...

Method for measuring the poisson's ratio and the residual stress of a material

The subject matter of the present invention is a method for measuring the Poisson's ratio and the residual stress of any material, that is, a metal, ceramic, polymeric, crystalline or amorphous material, in the form of a bulk material or surface coating.

SYSTEM AND METHOD FOR TESTING OR CALIBRATING IN A PRESSURIZED AND/OR WET ENVIRONMENT

A system for testing or calibrating a part, the system including: a plurality of test stations, each test station including a container and a clamping mechanism, wherein the clamping mechanism includes: a clamp frame including: two clamp plates; a plurality of clamp bars configured to securely hold the clamp plates at a distance relative to each other; a seal manifold provided on one of the two clamp plates; and a clamping module, located opposite the seal manifold on another of the two clamp plates, wherein the clamping module includes: a plurality of pistons to hold the part against the seal manifold for the test operation; and at least one cleaning station comprising a spin mechanism for spinning the part to remove excess fluid; and a robotic system for moving individual parts to and from the plurality of test stations and to and from the at least one cleaning station. 1. A system for testing or calibrating a part , the system comprising: [ two clamp plates;', 'a plurality of clamp bars configured to securely hold the clamp plates at a distance relative to each other;, 'a clamp frame comprising, 'a seal manifold provided on one of the two clamp plates; and', 'a plurality of pistons to hold the part against the seal manifold for the test operation; and', 'a clamping module, located opposite the seal manifold on another of the two clamp plates, wherein the clamping module comprises], 'a plurality of test stations, each test station comprising a container and a clamping mechanism, wherein the container is configured to hold a fluid and the clamping mechanism is configured to receive the part in a vertical orientation and clamp the part horizontally with sufficient force to withstand a predetermined pressure to be placed on the part while submerged in the fluid, wherein the clamping mechanism comprisesat least one cleaning station comprising a spin mechanism for spinning the part to remove excess fluid; anda robotic system for moving individual parts to and from the ...

DEVICES, SYSTEMS, AND METHODS FOR INSTALLING AND LOAD TESTING EARTH ANCHOR FOUNDATIONS

Devices, systems, and methods for installing earth anchor foundations and/or conducting load tension tests on earth anchors used to secure structures, such as solar platforms, trellises, tents, decking, bleachers, telephone poles, powerlines, construction scaffolding, and the like. In one example, the device includes a base plate, a plurality of elongate telescoping members extending from the base plate and containing a crank mechanism. A drive shaft on the upper member is coupled to the crank mechanism to raise and lower the upper member relative to the base plate. A support arm or shelf is provided on the upper member for raising a frame during installation of the structure, and a testing hook is provided on the upper member for conducting a load tension test on one or more earth anchors used to secure the structure using a load measurement device coupled to the hook and the earth anchor(s). 1. A device for installing and/or testing earth anchors for securing a structure , comprising:a base plate defining an upper surface;an elongate first member including a lower end mounted to the upper surface of the base plate along an axis extending from the upper surface;an elongate second member telescopingly mounted to the first member;an actuator on the second member coupled to a crank mechanism inside one or both of the first and second members to selectively move the second member along the axis towards or away from the base plate;a support arm extending from the second member substantially perpendicular to the axis; anda testing hook on the second member for conducting a load tension test on an earth anchor coupled to the hook.2. The device of claim 1 , further comprising a load measuring device connectable to the hook claim 1 , the load measuring device comprising a connector for coupling to an exposed end of an earth anchor installed into the ground to measure a tensile force application to the earth anchor when the actuator is activated to raise the second member ...

DEVICE FOR EVALUATING 360-DEGREE BIDIRECTIONAL FOLDING DURABILITY OF FLEXIBLE MATERIAL

Provided is a device for evaluating 360-degree bidirectional folding durability of a flexible material in which during a folding test of a film-type flexible material, a single folding device can implement both the infolding and outfolding of the flexible material relative to the unfolded state of the flexible material. To this end, the device includes: a fixing unit configured to fix a first side of the flexible material to be evaluated; a moving unit configured to fix a second side of the flexible material and disposed to be spaced apart from the fixing unit; a motion guide unit to which the fixing unit is fixed; and a motion unit connecting the motion guide unit with the moving unit. 1. A device for evaluating 360-degree bidirectional folding durability of a flexible material , the device comprising:a fixing unit configured to fix a first side of the flexible material to be evaluated;a moving unit configured to fix a second side of the flexible material and disposed to be spaced apart from the fixing unit such that the moving unit has the same plane as a plane of the fixing unit in an unfolded state of the flexible material, the moving unit being configured to rotate relative to the fixing unit so as to infold or outfold the flexible material in the unfolded state;a motion guide unit to which the fixing unit is fixed, the motion guide unit forming a rotation path of the moving unit such that the moving unit rotates relative to a middle point between the fixing unit and the moving unit; anda motion unit connecting the motion guide unit with the moving unit,wherein the moving unit makes a pivot rotation relative to the motion unit in response to each of the infolding and outfolding of the flexible material, and slides along a normal direction passing through the middle point between the fixing unit and the moving unit.2. The device of claim 1 , wherein a circular guide groove part is formed in the motion guide unit by being recessed therefrom by corresponding to ...

Systems and Methods for Verification and Calibration of Hamburg Wheel Tracker Devices

A load and motion measurement system for use with a Hamburg Wheel Tracker device includes: a housing; at least one load cell held in or by the housing; a load platform held in or by the housing and resting on the at least one load cell; and a controller operatively associated with the at least one load cell. The load and motion measurement system is configured to be received in a sample tray that is held in the Hamburg Wheel Tracker device. The controller is configured to determine operational parameters associated with a wheel of the Hamburg Wheel Tracking device that rolls along the load platform. Vertical displacement measurement calibration and verification systems for use with a Hamburg Wheel Tracker device are also described, as are associated kits and methods. 1. A kit for calibrating and verifying the proper operation of a Hamburg Wheel Tracking device , the kit comprising: a housing;', 'at least one load cell held in or by the housing;', 'a load platform held in or by the housing and resting on the at least one load cell; and', 'a controller operatively associated with the at least one load cell;', 'wherein the load and motion measurement system is configured to be received in a sample tray that is held in the Hamburg Wheel Tracker device;', 'wherein the controller is configured to determine operational parameters associated with a wheel of the Hamburg Wheel Tracking device that rolls along the load platform; and, 'a load and motion measurement system comprising a frame;', 'a plurality of height blocks configured to be selectively stacked on the frame;', 'wherein the frame is configured to be received in a sample tray that is held in the Hamburg Wheel Tracker device such that a wheel thereof rolls onto the frame and/or one or more of the height blocks stacked thereon to verify the accuracy of a vertical displacement device associated with the Hamburg Wheel Tracker device., 'a vertical displacement measurement calibration and verification system comprising2. ...

FRACTURE DETERMINATION DEVICE, FRACTURE DETERMINATION PROGRAM, AND METHOD THEREOF

This fracture determination device is provided with: an element extraction unit which extracts elements included in the heat affected zone formed around a spot weld in a steel material; a reference forming limit value generation unit which generates a reference forming limit value depending on sheet thickness and material property of the heat affected zone on the basis of reference forming limit value information; a heat affected zone forming limit value generation unit which uses the tensile strength of the steel material and element size to change the reference forming limit value, predict the forming limit value for the element size and generated a forming limit value in the heat affected zone; an analysis running unit which runs a deformation SIM using input information and which outputs deformation information including maximum principal strain and minimum principal strain of each of the elements; a principal strain determination unit which determines the maximum principal strain and the minimum principal strain of each of the elements included in the deformation information; and a fracture determination unit which, on the basis of the determined maximum principal strain and minimum principal strain of each of the elements and the forming limit value in the heat affected zone, determines whether each element calculated in the deformation SIM will fracture. 1. A fracture determination device comprising:a storage unit which stores element input information indicating material property and sheet thickness of a steel material having a heat affected zone and an element size in an analysis model used for a deformation analysis of the steel material by a finite element method, and reference forming limit value information indicating a reference forming limit value used as a forming limit value in a reference element size, which is an element size used as a reference;an element extraction unit which extracts elements included in the heat affected zone formed around a ...

NOTCH TREATMENT METHODS FOR FLAW SIMULATION

A notch treatment method for flaw simulation including providing the specimen with the notch, the notch having a re-melt material layer; isolating the notch; and selectively etching the notch to provide an etched surface of the notch; wherein at least a portion of the re-melt material layer has been removed from the notch. In one aspect, there is provided a notch treatment method for flaw simulation including providing the specimen with the notch, the notch having a re-melt material layer, the specimen includes steel or an alloy thereof; isolating the notch; and selectively etching the notch with a first etching solution and a second etching solution to provide an etched surface on the notch; wherein at least a portion of the re-melt material layer has been removed from the notch. 1. A notch treatment method for flaw simulation , comprising:providing a specimen with a notch, the notch having a re-melt material layer, the specimen comprises aluminum or an alloy thereof;isolating the notch; andselectively etching the notch using an etching solution comprising a sodium hydroxide solution to provide an etched surface of the notch;wherein at least a portion of the re-melt material layer has been removed from the notch.2. The treatment method according to claim 1 , wherein the step of providing the specimen with the notch comprises:generating the notch on the specimen by electrical discharge machining.3. The treatment method according to claim 1 , wherein the re-melt material layer is disposed on at least one of a root notch and a lateral side wall of the notch.4. The treatment method according to claim 1 , wherein the specimen has a square cross-sectional portion and the notch is located in a corner of the square cross-sectional portion.5. (canceled)6. The treatment method according to claim 1 , wherein the step of isolating the notch comprises:placing an isolation layer with a slot onto the specimen such that the slot exposes the notch.7. The treatment method according ...

LIFT TABLE FOR A LOAD FRAME

A lift table includes a first adjuster having a base with a bore and a collet that is threaded into the bore of the base, the first adjuster being configured to selectively secure the lift table to the load frame, and a plate that sits atop the collet, the plate being configured to hold a fixture that is attached to the load frame. Rotation of the collet in a first direction relative to the base raises the plate and rotation of the collet in a second direction relative to the base lowers the plate. 1. A lift table for a load frame comprising:a first adjuster having a base with a bore and a collet that is threaded into the bore of the base, the first adjuster being configured to selectively secure the lift table to the load frame; anda plate that sits atop the collet, the plate being configured to hold a fixture that is attached to the load frame,wherein rotation of the collet in a first direction relative to the base raises the plate and rotation of the collet in a second direction relative to the base lowers the plate.2. The lift table of wherein the first adjuster includes a locking feature to prevent over-rotation and separation of the collet from the base.3. The lift table of further comprising a second adjuster claim 1 , the first adjuster being a coarse adjuster and the second adjuster being a fine adjuster.4. The lift table of wherein the second adjuster enables rotation of the plate relative to the collet in the first direction to raise the plate and rotation of the plate relative to the collet in the second direction to lower the plate.5. The lift table of wherein the second adjuster includes a locking features to prevent over-rotation and separation of the plate from the collet.6. The lift table of wherein the table includes centering marks to aid in aligning the fixture.7. The lift table of further comprising a centering tool secured to the top of the plate to aid in aligning the fixture on top of the plate.8. The lift table of wherein the fixture is ...

OPTOMECHANICAL REFERENCE

An optomechanical reference includes a basal member; a flexure that includes: a floating link; a first flexural member; and a second flexural member such that: the floating link is moveably disposed; a first stator; a second stator; a first cavity including: a first primary mirror; a first secondary mirror; a first optical coupler in optical communication with the first secondary mirror; and a first cavity length; and a second cavity including: a second primary mirror; a second secondary mirror; a second optical coupler; and a second cavity length. 1. An optomechanical reference comprising:a basal member; a floating link disposed on the basal member;', 'a first flexural member interposed between the basal member and the floating link; and', the floating link is moveably disposed on the basal member via flexing of the first flexural member and the second flexural member, and', 'the first flexural member and the second flexural member are spaced apart and in mechanical communication by the floating link;, 'a second flexural member interposed between the basal member and the floating link such that], 'a flexure disposed on the basal member and comprising the first stator is spaced apart from the flexure, and', 'the first stator is subject to displacement when the basal member is displaced;, 'a first stator disposed on the basal member and opposing the flexure such that the second stator is spaced apart from the flexure, and', 'the second stator is subject to displacement when the basal member is displaced;, 'a second stator disposed on the basal member and opposing the flexure such that a first primary mirror disposed on the flexure;', 'a first secondary mirror disposed on the first stator and in optical communication with the first primary mirror;', 'a first optical coupler in optical communication with the first secondary mirror and that provides a first laser light to the first cavity; and', 'a first cavity length comprising a first distance between the first ...

Systems and Methods for Characterizing Poroelastic Materials

Disclosed herein are systems and methods for characterizing poroelastic materials. Indentation of a poroelastic solid by a spherical-tip tool is analyzed within the framework of Biot's theory. The present disclosure provides the response of the indentation force as well as the field variables as functions of time when the rigid indenter is loaded instantaneously to a fixed depth. Some embodiments of the present disclosure consider the particular case when the surface of the semi-infinite domain is permeable and under a drained condition. Compressibility of both the fluid and solid phases is taken into account. The solution procedure based on the McNamee-Gibson displacement function method is adopted. 1. A method for characterizing a material comprising: wherein the indentation force data and time data are based upon a response of a material to an indentation force over time;', 'wherein the first asymptote corresponds to a first time from the time data; and wherein the second asymptote corresponds to a second time from the time data; and, 'selecting a corresponding master curve from a set of theoretical master curves based on a ratio of a first asymptote of indentation force data and a second asymptote of the indentation force datacalculating a value for a property of the material by correlating the indentation force data and time data with the corresponding master curve.2. The method of further comprising obtaining the indentation force data and time data for the material:wherein the material is a poroelastic material; and indenting over time, with an indentation tool, the poroelastic material to a predetermined indentation depth; and', 'measuring a force required to maintain the indentation tool at the predetermined indentation depth., 'wherein obtaining the indentation force data and time data comprises3. (canceled)4. The method of wherein the indentation tool is selected from the group consisting of: permeable rigid sDhere indenters and impermeable rgi sphere ...

METHODS AND APPARATUS TO PERFORM MECHANICAL PROPERTY TESTING

Methods and apparatus to perform mechanical property testing are disclosed. An example testing device includes a computing device configured to obtain a measurement value related to the material or component under test. The computing device includes: a display device; an input device; a processor; and memory coupled to the processor to store computer readable instructions which, when executed by the processor, cause the processor to: display, via the display device, a testing mode interface either directly or in response to selection of the testing mode interface at the first interface, the testing mode interface configured to enable selection of a predetermined test definition interface; and in response to selection of the predetermined test definition interface via the input device, display a test interface, the test interface comprising: inputs for a predetermined subset of configurable test parameters of the testing device; and activation of a mechanical property test. 1. A testing device to measure a mechanical property of a material or component under test , the testing device comprising:a computing device configured to obtain a measurement value related to the material or component under test, the computing device comprising:a display device;an input device;a processor; anda memory coupled to the processor to store computer readable instructions which, when executed by the processor, cause the processor to:display, via the display device, a testing mode interface configured to enable selection of a predetermined test definition interface; andin response to selection of the predetermined test definition interface via the input device, display a test interface, the test interface comprising inputs for a predetermined subset of configurable test parameters of the testing device.2. The testing device as defined in claim 1 , wherein the predetermined subset are limited in number to fit on the display device without a need to open additional dialogs.3. The testing ...

Method And Apparatus For Shape-Based Energy Analysis Of Solids

A method of evaluating response of a physical structure to external stimulus includes defining a mesh of finite elements, each defined by edges, for a model of the physical structure. The method includes identifying a governing differential equation and associated complementary functions, which are each associated with a scalar multiplier. The method includes generating an energy optimization model that minimizes a difference between internal and external energies of the finite elements. The internal energy is based on strain energy in a volume defined by the edges of the finite element and resulting from deformations by the complementary functions. The external energy of each finite element is based on external work done by the external stimulus acting on the finite element as deformed by the complementary functions. The method includes solving the energy optimization model for the scalar multipliers and calculating a resulting parameter of interest of the physical structure. 1storing a structural model of the physical structure;defining a mesh for the structural model, wherein the mesh includes a plurality of finite elements, and wherein each element of the finite elements is defined by a plurality of edges of the element;identifying a governing differential equation for each of the plurality of finite elements; identifying a plurality of complementary functions that exactly satisfy the corresponding governing differential equation,', 'wherein each of the plurality of complementary functions for the finite element is associated with a respective scalar multiplier, and', 'wherein a count of the respective scalar multipliers for the element establishes a number of degrees of freedom of the element;, 'for each element of the plurality of finite elementsdetermining an applied stimulus for the physical structure, wherein the applied stimulus includes at least one of an applied mechanical force, an applied mechanical stress, an applied mechanical strain, an applied ...

Guide for Compression Test

The present disclosure provides for a guide for use in a compression test, the compression test comprising loading a test sample between a first loading plate and an opposing load applied between the test sample and the first loading plate in a loading direction, the guide comprising: at least one support member, positionable between the first loading plate and the load and extending substantially parallel to the loading direction to constrain the test sample in a direction perpendicular to the loading direction, wherein, when in use, the at least one support member is positioned to define a space between the first loading plate and the support member such that when a load is applied the test sample is deformable in a direction perpendicular to the loading direction within the space. 1. A guide for use in a compression test , the compression test comprising loading a test sample between a first loading plate and an opposing load applied between the test sample and the first loading plate in a loading direction , the guide comprising:at least one support member, positionable between the first loading plate and the load and extending substantially parallel to the loading direction to constrain the test sample in a direction perpendicular to the loading direction,wherein, when in use, the at least one support member is positioned to define a space between the first loading plate and the support member such that when a load is applied the test sample is deformable in a direction perpendicular to the loading direction within the space.2. The guide according to claim 1 , wherein the load applied to the test sample is provided by an impactor member.3. The guide according to claim 2 , wherein the first loading plate is a lower loading plate relative to the impactor member when applying the load to the test sample claim 2 , during use.4. The guide according to claim 2 , wherein the impactor member comprises a substantially planar-shaped impactor head portion having a contact ...

FREQUENCY DOUBLING ANTENNA SENSOR FOR WIRELESS STRAIN AND CRACK SENSING

A strain and crack sensor senses an amount of strain induced in an object. A receiving planar antenna has a first resonant frequency and is configured to receive a querying signal at the first resonant frequency. A transmitting planar antenna has a second resonant frequency that is twice the first resonant frequency. At least one of the receiving planar antenna and the transmitting planar antenna is bonded to the object so that at least one of strain induced in the object or a crack formed in the object causes a shift in at least one of the first resonant frequency or the second resonant frequency. A matching element is in electrical communication with the first planar antenna and the second planar antenna. The matching element is configured to cause the transmitting planar antenna to radiate a response signal in response to the querying signal. 1. A strain and crack sensor for sensing an amount of stress concentration induced in an object , comprising:(a) a receiving planar antenna having a first resonant frequency and configured to receive a querying signal at the first resonant frequency;(b) a transmitting planar antenna having a second resonant frequency that is twice the first resonant frequency, at least one of the receiving planar antenna and the transmitting planar antenna being bonded to the object so that strain induced in the object or a crack formed in the object causes a shift in at least one of the first resonant frequency or the second resonant frequency; and(c) a matching element in electrical communication with the first planar antenna and the second planar antenna, the matching element configured to cause the transmitting planar antenna to radiate a response signal in response to the querying signal.2. The strain and crack sensor of claim 1 , wherein the receiving planar antenna has a greater surface area that the transmitting planar antenna.3. The strain and crack sensor of claim 2 , wherein the receiving planar antenna and the transmitting planar ...

MULTI-FUNCTIONAL SUPPORT CAPABLE OF TRANSFERRING HORIZONTAL AND MULTI-POINT LOCAL VERTICAL LOAD AND IMPLEMENTATION METHOD

A multi-functional support capable of transferring a horizontal and multi-point local vertical load is provided. The multi-functional support is mainly formed by detachably assembling a distribution beam capable of transferring a vertical load locally and independently at multiple points, detachable upright columns, a template beam and a support base. The distribution beam capable of transferring a vertical load locally and independently at multiple points is located between tops of the two upright columns. The two upright columns are mounted on the support base. The template beam is located between the two upright columns, arranged on the support base and connected to the support base. The support base is fixed on a ground. The distribution beam capable of transferring a vertical load locally and independently at multiple points, the detachable upright columns, the support base and the template beam are located in the same plane. The multi-functional support can perform various experiments such as vertical loading, horizontal reciprocating loading and multi-point local independent vertical loading. By means of the detachable upright columns, loading and constraint fixing of an experimental wall can be realized step by step, thus reducing damage to a specimen by a moving specimen. The damage form of the loaded specimen can be kept effectively. 1. A multi-functional support capable of transferring a horizontal and multi-point local vertical load , mainly formed by detachably assembling a distribution beam capable of transferring a vertical load locally and independently at multiple points , detachable upright columns , a template beam and a support base , wherein the distribution beam capable of transferring a vertical load locally and independently at multiple points is located between tops of the two upright columns , the two upright columns are mounted on the support base , the template beam is located between the two upright columns , arranged on the support base ...

APPARATUS, SYSTEM AND METHOD FOR MECHANICAL TESTING UNDER CONFINED CONDITIONS

An apparatus for measuring mechanical properties of a downhole material, including first and second fixtures each of the fixtures containing a force application fixture to apply a stress to a specimen of the downhole material. A confining sleeve wraps around portions of the first and second fixtures to form a sealed specimen chamber defined by an inner surface of the confining sleeve and ends of the first and second fixtures nearest the specimen. Wall of a confining chamber contain the first and second fixtures, the confining sleeve and the specimen therein. The confining chamber holds a hydraulic fluid therein such that the hydraulic fluid can exert a confining pressure on the confining sleeve to maintain the seal of the specimen chamber and to maintain contact between the inner surface of the confining sleeve and the specimen when the stress is applied to the specimen. First channels pass though one or more of the walls of the confining chamber to add and remove the hydraulic fluid to and from the confining chamber. Second channels pass though one or more of the walls of the confining chamber and through one of the first and second fixtures to add and remove a pore space fluid to and from specimen chamber ports open to the specimen chamber to maintain a pore pressure at the specimen chamber ports that is equal to or less than the confining pressure while the stress is applied to the specimen. A system and method are also disclosed. 1. An apparatus for measuring mechanical properties of a downhole material , the apparatus comprising:first and second fixtures each containing a force application fixture, the force application fixture configured to apply a stress to a specimen of the downhole material when located in-between the first and second fixtures;a confining sleeve configured to wrap around portions of the first and second fixtures that are nearest to the specimen to form a sealed specimen chamber, the sealed specimen chamber dimensions defined by an inner ...

Material Testing Machine

Seat members are held in a state of being movable with respect to first slide members or second slide members correspondingly. By rotating screws in directions to increase the distances d between surfaces A of the first slide members or the second slide members and surfaces B of the seat members , chucks are moved in directions to increase the distance between the chucks to apply pretension to a test piece correspondingly. When backlash in a force transmission system from a support part to the respective chucks is eliminated, a biaxial tensile test is started. 2. The material testing machine according to claim 1 , whereinthe pretension mechanisms change distances between the end parts of the link members on the sides opposite to the swing shafts and the chucks, and thereby apply the pretensions to the test piece correspondingly.3. The material testing machine according to claim 2 , wherein:the connecting mechanisms include pins and seating surfaces touching the pins correspondingly; andthe pretension mechanisms apply the pretensions to the test piece by changing distances between the pins and the chucks correspondingly.4. The material testing machine according to claim 3 , wherein:the first moving members and the second moving members are configured to include seat members formed with the seating surfaces and slide members holding the seat members correspondingly; andthe pretension mechanisms have pressing members that move the seat members with respect to the slide members correspondingly.5. The material testing machine according to claim 1 , whereinthe pretension mechanisms apply the pretensions to the test piece by changing positions of the swing shafts correspondingly.6. The material testing machine according to claim 5 , wherein:the swing shafts are pivotally supported by bearing members movable in directions intersecting with longer directions of the link members correspondingly; andthe pretension mechanisms comprise pressing members for pressing the bearing ...

METHOD AND DEVICE FOR HARDNESS TESTING

In a method and device for setting one or more measuring points on a specimen in a specimen holder for automated hardness testing in a hardness-testing device, the hardness-testing device has a table, a tool holder with a penetrator and at least one lens. The specimen holder with the specimen is positioned on the table in the x- and y-directions. The table and/or tool holder can be moved in the z-direction, relative to one another. A virtual three-dimensional model of the specimen holder and specimen is selected from data storage, and the model and/or an overview image of the specimen is depicted on a screen. Then, a point is marked in the image, and one or more measuring point is/are automatically defined based on the measuring method selected. To each measuring point, the z-coordinate is automatically assigned in the hardness-testing device based on its x- and y-coordinates and virtual model. 113541123111215742231rrr. Method for setting one or more measuring points () on at least one specimen () in a specimen holder () for automated hardness testing in a hardness-testing device () , whereby the hardness-testing device () has a table () , a tool holder () with at least one penetrator () and at least one lens () , and optionally an overview image camera () and a screen () , whereby the specimen holder () can be positioned on the table () in the x- and y-directions , and whereby the table () and/or the tool holder () of the hardness-testing device () can be moved in the z-direction , relative to one another , the method comprising:{'b': 9', '4', '5, 'i': v', 'v, 'a) Selection and provision of a virtual three-dimensional model () of the specimen holder () with at least one specimen (), arranged thereon, from an electronic data storage device,'}{'b': 4', '5', '2, 'i': r', 'r, 'b) Positioning of the specimen holder (), equipped with the specimen (), on the table (),'}{'b': 9', '5', '7, 'i': 'r', 'c) Automatic depiction of the model () and/or an overview image, prepared ...

COAL MEASURES FAULT FORMATION SIMULATION EXPERIMENT DEVICE AND NORMAL AND REVERSE FAULT SIMULATION EXPERIMENT METHOD

A coal measures fault formation simulation experimental device and a normal and reverse fault simulation experiment method relate to the field of similar material simulation experiment technology. The device includes a hydraulic lifting apparatus, a lower angle adjusting apparatus, a push rod apparatus, an upper loading apparatus, an upper angle adjusting apparatus, a lateral loading apparatus and a transparent side plate. The hydraulic lifting apparatus and the lower angle adjusting apparatus are below the experimental body, the upper loading apparatus and the upper angle adjusting apparatus are above the experimental body, the transparent side plate is disposed at a rear side surface of the experimental body, and the lateral loading apparatus is disposed at an end face of the experimental body. When the normal fault is simulated with the device, the inclination angle of an inclined plate of the lower angle adjusting apparatus is same as that of an inclined push plate of the upper angle adjusting apparatus, the upper loading apparatus loads downward to form a normal fault; when the reverse fault is simulated, a fault-inducing experimental block is disposed at the bottom of the experimental body so as to form the reverse fault by loading of the lateral loading apparatus. Herein, the technical problem that the dip angle and the fracture initiation position of the simulation fault are inconveniently controlled is solved. 1. A coal measures fault formation simulation experiment device , comprising a base , a column , a top beam and a baffle plate , a hydraulic lifting apparatus , a lower angle adjusting apparatus , a push rod apparatus , an upper loading apparatus , an upper angle adjusting apparatus , a lateral loading apparatus and a transparent side plate , wherein both ends of the base are provided with columns , baffle plates are disposed on the base between the columns , the top ends of the columns are connected through the top beam and an experimental body is ...

BAUSCHINGER EFFECT TEST FIXTURE

A Bauschinger effect test fixture that cooperates with a test machine for stretching and compressing materials to perform a Bauschinger effect test on a test piece having a symmetrical configuration with two wide ends and a narrow middle part. The fixture includes two identical split bodies, where each split body has a base provided, longitudinally from a central part to one end of the base, with a limiting groove corresponding to a half of the profile of the test piece. Two sides of the groove are arranged symmetrically with a plurality of threaded through holes and a cover is provided along its central axis with two threaded through holes with which the test piece is pressed tightly by bolts. An end of the cover corresponding to a notch of the limiting groove is provided with a through groove configured for placing a stress ultrasonic detection probe on the test piece.

IMPACT TESTING DEVICE

An impacting testing device is provided. The impacting testing device comprises a first platform, a second platform, a plurality of first suspension devices, at least one impact assembly and a plurality of second suspension devices. The at least one impact assembly is disposed on the second platform and faces the first platform for providing at least one impact force to the first platform, and thus, the impact testing is executed on an object disposed on the first platform. 1. An impacting testing device for executing an impact test on an object when the impacting testing device bears the object , comprising:a first platform for bearing the object;a second platform disposed under and parallel to the first platform;a plurality of first suspension devices disposed between the first platform and the second platform for bearing the first platform;at least one impact assembly disposed on the second platform and facing the first platform for providing at least one impact force to the first platform; anda plurality of second suspension devices opposite the first suspension devices and disposed under the second platform;wherein the second suspension devices are used for bearing the first platform, the second platform, the first suspension devices and the at least one impact assembly in order to absorb at least one reacting force generated by the at least one impact force when the test is executed.2. The impacting testing device according to claim 1 , wherein the at least one impact assembly comprises an impact assembly and the impact assembly comprises at least one impact hammer.3. The impacting testing device according to claim 2 , wherein the at least one impact hammer comprises four first impact hammers claim 2 , two of which are disposed opposite to each other and the other two of which are disposed also opposite to each other.4. The impacting testing device according to claim 3 , wherein the impact assembly further comprises a second impact hammer disposed between the ...

FIXTURE FOR PERFORMING DROP TEST ON CAMERA MODULES

A fixture includes a base, a carrier plate, a number of pressing strips, and a cover. The base defines a base receiving chamber. The carrier plate is received in the base receiving chamber and defines a number of receiving portions in a surface opposite to the base, each receiving portion is configured for receiving a camera module, the receiving portions being arranged in a plurality of lines, the carrier plate defines a spacing portion between each two adjacent receiving portions in the same line. Each pressing strip is pressed into the spacing portions associated with one of the lines of the receiving portions to press the camera modules in the lines of the receiving portions. The cover is fixed to the base and covers the carrier plate. 1. A fixture for holding camera modules , comprising:a cover comprising a first surface and a second surface at opposite sides thereof, the cover defining a first receiving chamber in the second surface;a base comprising a third surface and a fourth surface at opposite sides thereof, the base defining a second receiving chamber in the third surface;a carrier plate received in the first and second receiving chambers, the carrier plate comprising a fifth surface and a sixth surface at opposite sides thereof, the carrier plate defining:a plurality of receiving portions in the fifth surface, each receiving portion being configured for receiving a camera module, the receiving portions being arranged in a plurality of lines; anda plurality of spacing portions, each spacing portion located between two corresponding adjacent receiving portions in a given same line of the receiving portions, each spacing portion communicating with the two adjacent receiving portions; anda plurality of pressing strips, each of which is pressable into a corresponding line of the spacing portions such that the pressing strip presses against one or more camera modules received in the corresponding line of the receiving portions.2. The fixture of claim 1 , ...

CYCLE FRAME FATIGUE AND DURABILITY ASSEMBLY

An assembly, system and method is disclosed for measuring fatigue and durability of a bicycle frame by applying and measuring a precise input of force to a frame. The system of the present invention is configured to measure failure points of different constructions and size of bicycle frames including carbon fiber, aluminum and steel frame constructions. 1. An assembly for rating a bicycle frame , comprising:a stand configured with an internal void and a mounting plate for securing a motor thereto,a mounting assembly operably coupled to said the stand for securing the bicycle frame thereto, said mounting assembly being disposed above said mounting plate and motor;a transmission assembly operably coupled to said motor so as to gear-down revolutions of said motor in a ration of 10:1 to simulate bicycle conditionsa crank assembly comprising one or more crank arms operably connected to said transmission assembly, each of said crank arms being connected at one end to said transmission and at the other end to a connector bar mounted by a pivot to a square mount attached to said stand below a bottom bracket of the bicycle frame mounted for testing; andone or more pistons operably connected to said crank arms so as to provide macro and fine adjustments to connect said pistons and said motor to the to the bicycle frame via each crank arm; andwhereby when said motor is energized to provide a predetermined force input to each pedal arm so as to fatigue the bicycle frame such that the number of cycles to fatigue can be counted.2. A system for rating a bicycle frame , comprisinga scale of failure points for a predetermined construction of the bicycle frame;a stand configured with an internal void and a mounting plate for securing a motor thereto,a mounting assembly operably coupled to said the stand for securing the bicycle frame thereto, said mounting assembly being disposed above said mounting plate and motor;a transmission assembly operably coupled to said motor so as to gear ...

METHODS AND APPARATUS FOR DETERMINING A CRUSH STRENGTH OF AN EDGE

A test apparatus comprises a probe movably mounted relative to a carrier. The probe comprises an end portion with a surface area of about 5 mmor less. The test apparatus can be used in methods of determining a crush strength of an edge of a substrate. Methods can comprise aligning the probe with a test location of the substrate at a predetermined angle relative to a probe axis. Methods can further comprise applying a mechanical force to the test location with the probe in the direction of the probe axis. Also, methods can comprise increasing the mechanical force applied by the probe until the substrate cracks or a predefined force applied by the probe is reached. Based on the mechanical force applied by the probe, a crush strength of an edge can be determined. 1. A test apparatus comprising:a carrier; and{'sup': '2', 'a probe movably mounted relative to the carrier, the probe comprising an end portion extending 0.25 mm from an outer tip of the probe, wherein a surface area of the end portion is about 5 mmor less.'}2. The test apparatus of claim 1 , wherein the carrier is rotatable about a first adjustment axis.3. The test apparatus of claim 2 , wherein the probe is movable relative to the carrier along a probe axis that is perpendicular to the first adjustment axis.4. The test apparatus of claim 2 , further comprising a lock to releasably fix the carrier in a selected position relative to the first adjustment axis.5. The test apparatus according to claim 2 , wherein the carrier is rotatable about a second adjustment axis perpendicular to the first adjustment axis and the probe axis.6. The test apparatus of claim 1 , wherein the carrier comprises a clamp.7. The test apparatus of claim 1 , wherein the probe comprises a thermoplastic polymer.8. The test apparatus of claim 1 , wherein the probe comprises a first surface and a second surface claim 1 , wherein the first surface and the second surface converge toward the outer tip of the probe.9. The test apparatus of ...

DEVICE AND METHOD FOR MEASURING CREEP CRACK GROWTH PROPERTIES BY USING SMALL SPECIMEN HAVING FINE GROOVE

An apparatus and a method for measuring a creep crack growth property using a small specimen with a micro groove are provided. The apparatus for measuring a creep crack growth property includes a lower die on which an edge of the specimen is mounted and which includes a lower die hole formed in the center thereof, an upper die coupled to an upper portion of the lower die so as to fix the specimen, and a punching unit inserted into an upper die hole formed in the center of the upper die so as to press an upper surface of the specimen, wherein a semielliptical micro groove is formed in a lower surface of the specimen to measure a creep crack growth property. 1. An apparatus for measuring a creep crack growth property using a specimen small with a micro groove , the apparatus comprising:a lower die on which an edge of the specimen is mounted and which includes a lower die hole formed in the center thereof;an upper die coupled to an upper portion of the lower die so as to fix the specimen; anda punching unit inserted into an upper die hole formed in the center of the upper die so as to press an upper surface of the specimen,wherein the micro groove is formed in a semielliptical shape in a lower surface of the specimen to measure a creep crack growth property.2. The apparatus of claim 1 , wherein the punching unit includes:a punching ball which is inserted into the upper die hole and comes into contact with the upper surface of the specimen; anda punch which presses an upper portion of the punching ball.3. The apparatus of claim 1 , wherein the micro groove is formed using a laser.6. The apparatus of claim 4 , wherein the micro groove aspect ratio (a/c) of the stress intensity factor is 0.5.7. The apparatus of claim 4 , wherein the micro groove depth ratio (a/t) of the stress intensity factor is in a range of 0.1 to 0.3.9. A method of measuring a creep crack growth property using a specimen small claim 4 , the method comprising:forming a micro groove formed in a ...

EXPERIMENT METHOD FOR SIMULATED IMPACT-TYPE ROCK BURST

An experimental method for simulating an impact rock-burst, comprises the following steps: making a rock sample having a through hole or a half hole; loading initial static stresses of three directions onto the rock sample; then loading dynamic load(s) by 0.5-10 minutes, to determine whether a spalling phenomenon appears on an internal surface of the hole; if appears, and the rock sample is further damaged, determining and recording a failure course, if not appears, increasing the static stress(es) or the intensity of the dynamic load, then repeating the experiment procedure as far as rock sample goes into the failure course, then determining and recording the failure course, and ending the expierment. The impact rockburst induced by dynamic load is simulated on the rock sample successfully, and by studying mechanical mechanisms of the rock-burst, the present application lays foundations for gradually understanding and mastering the nature of real rock burst. 1. An experimental method for simulating an impact rockburst , the method comprising:S1: making a rock sample specimen having a through hole or a half hole;S2: loading initial static stresses of three directions onto the rock sample specimen, and maintaining the initial static stresses of the three directions, to simulate a situation that an excavated tunnel suffers the static stresses;S3: loading dynamic load(s) of one direction, two directions or three directions onto the rock sample specimen by 0.5-10 minutes, so as to determine whether a spalling phenomenon appears on an internal surface of the through hole or the half hole, wherein the dynamic load is used to simulate the disturbance wave induced by an excavation, a blasting, an earthquake or a mechanical vibration;S4: under an action of the dynamic load in the step S3, if it is determined that the spalling phenomenon appears on the internal surface of the hole, unceasingly maintaining a state of loading the dynamic load in the step S3 by 0.5-10 minutes, ...

Material Testing System Having Improved Hydraulic Wedge Clips

A material testing system that uses at least one hydraulic grip is improved with cable clips that are attachable to a respective lateral side of each hydraulic grip wedge. Each cable clip has another end that extends to engage a cable(s) extending from a corresponding wedge retention spring hole. The cable(s) enable manual extension of a wedge retention spring for engagement and disengagement from the hydraulic grip wedge. The cable clip maintains the cable in a noninterfering position during operational use of the material testing system. 1. A material testing system comprising: a base positioned on a support surface,', 'a main actuator supported by the base and below a lower attachment fixture that is vertically actuated by the main actuator, and', 'an upper fixture that is held at a distance from the lower attachment fixture; and, 'a load frame comprising a fixture body having a wedge recess,', 'a pair of hydraulic grip wedges received in opposition within the wedge recess, each hydraulic grip wedge having a pair of vertical wedge retention spring holes that are perpendicularly intersected respectively by a horizontal retention bolt hole,', 'four retention springs having one end attached to the fixture body and another end extending upward respectively in the vertical wedge retention spring holes,', 'a cable engaged to the other end respectively of each extension spring and extending out of the corresponding hydraulic grip wedge, enabling manual extension of the respective retention spring,', 'at least two spring retention bolts received respectively in the horizontal retention bolt holes to attach to the other end of the wedge retention spring during extension by the corresponding cable, and', 'four or more cable clips that are respectively attached at one end to a lateral side of one of the pair of hydraulic grip wedges and engaged at another end to a corresponding cable to maintain the cable in a noninterfering position., 'at least one hydraulic grip that ...

ROTATING DOVETAIL CONNECTION FOR MATERIALS TESTING

A rotating dovetail connection is provided in order to attach jaw faces to grips in materials testing. The connection includes a machined tongue on the jaw face and a corresponding groove on the jaw face holder. A ball plunger within the holder serves to center the jaw face and to retain the jaw face in the holder. The jaw faces can be installed an removed without the use of tools or loose parts. The rotating dovetail facilitates a secure connection between the jaw face and the grip while allowing the jaw faces to rotate. 1. A jaw face for materials testing comprising:a plate with a first planar surface and a second planar surface; a longitudinal axis parallel to the first planar surface;', 'a first end, a second end, a first side and a second side which are perpendicular to the first planar surface; and', 'a face with edges contacting distal edges of the first end, second end, first side and second side;, 'a tongue extending from the first planar surface, the tongue includingthe face having a convex partially cylindrical shape and including a detent depression, and further including first and second chamfered portions extending to the distal edges of the first end and second end;an aperture extending through the tongue perpendicular to the longitudinal axis with a first opening on the first side and a second opening on the second side;a first undercut section at an intersection of a proximal edge of the first side of the tongue and the first planar surface; anda second undercut section at an intersection of a proximal edge of the second side of the tongue and the first planar surface.2. The jaw face of wherein the first side and the second side of the tongue are parallel to the longitudinal axis of the tongue.3. The jaw face of wherein the first end and the second end of the tongue are perpendicular to the longitudinal axis of the tongue.4. The jaw face of wherein the second planar surface is a gripping planar surface. This application is a continuation of U.S. ...

METHOD AND APPARATUS FOR MANUFACTURING MEMBRANES BY PROCESSING THIN-FILM MATERIALS WITH A FLOW OF ELECTRICALLY CHARGED SOLID PARTICLES

Proposed is a reliable and cost-effective universal material tester with reduced cross-talk between the sensors. The sensor unit consists of a pressure-sensor unit that measures a vertical force applied to the test probe during movement of the test probe relative to the test specimen and a horizontal force sensor unit for measuring the horizontally directed friction force. The horizontal force sensor unit is made in the form of a flexible parallelogram consisting of two sensor-holding plates interconnected through flexible beams, wherein one end of the first beam is attached to the upper sensor-holding plate and the opposite end to the lower sensor-holding plate, while one end of the second beam is attached to the lower sensor-holding plate and the other to the upper one. The beams are installed with gaps relative to both plates. The tester has a quick-release test probe that incorporates a soft-touch feature. 117.-. (canceled)18. A method for treating a thin-film material to a required state with a flow of solid and electrically chargeable particles in an electric field comprising the steps of:providing a first electrode penetrable to electrically chargeable solid particles and a second electrode which is not penetrable to electrically chargeable solid particles;arranging both electrodes at a distance from each other, thus forming an interelectrode space;providing a voltage source and applying a voltage of a predetermined sign to one of said electrodes and a voltage of an opposite sign to another of said electrodes, thus generating an electric field in the interelectrode space;placing a thin-film material to be treated above the first electrode;feeding electrically chargeable solid particles into the interelectrode space onto or near the second electrode;charging the electrically chargeable solid particles with the charge of the same sign as the second electrode; andgenerating a flow of electrically chargeable solid particles from the second electrode to the first ...

Large Sample Testing Device, Method, and System

The present invention includes a load frame test device using a plurality of levers about a common pivot point for applying combinations of tensile loading and bending on test articles at magnitudes seen in offshore applications. 1. A load frame test device comprising:a support column;a first crosshead;a first lever rotatable about a first pivot pin and attached to a first hydraulic cylinder about a second pivot pin at a first end;a second lever rotatable about the first pivot pin and attached to a second hydraulic cylinder about a third pivot pin at a first end;a first test article interface coupled to the second lever; anda second test article interface rotatable about a second pivot pin.2. The apparatus of claim 1 , further comprising a second test article interface coupled to a lever rotatable about a pin with the frame.3. The apparatus of claim 2 , wherein the lever is connected to the second hydraulic cylinder at a first end.4. The apparatus of claim 1 , wherein the first force applies a substantially axial load.5. The apparatus of claim 1 , wherein the second force applies a substantially bending moment.6. The apparatus of claim 1 , wherein the first force applies a substantially axial load in the test article and the second force applies a bending moment.7. The apparatus of claim 1 , wherein the first hydraulic cylinder is coupled to the frame.8. The apparatus of claim 1 , wherein the first lever is further attached to the frame about a fourth pivot pin at a second end.9. The apparatus of claim 1 , wherein the first test article interface is a split clamp.10. The apparatus of claim 1 , wherein the second test article interface is a split clamp.11. The apparatus of claim 1 , further comprising a tubular test article.12. The apparatus of claim 1 , further comprising a flange test article.13. The apparatus of claim 1 , further comprising a connection test article.14. The apparatus of claim 1 , further comprising a welded test article.15. A load frame test ...

DOUBLE CANTILEVER BEAM-ENCODING LEAD SCREW COMBINED SENSING TENSILE TEST METHOD AND MACHINE

The present invention discloses a double cantilever beam-encoding lead screw combined sensing tensile test method and machine. The double cantilever beam-encoding lead screw combined sensing tensile test machine comprises a main frame, a standard, a test piece and a microcomputer numerical control unit. The main frame is a force-deformation combined sensing mechanism composed of a double cantilever beam sensor, an encoding lead screw and a drive device. The double cantilever beam sensor is composed of a fixed cantilever beam sensor and a movable cantilever beam sensor. The encoding lead screw is composed of a drive lead screw and a tristate encoder. The double cantilever beam sensor matches with the encoding lead screw to achieve three functions, namely, test piece clamping, force sensing and deformation sensing, as well as to measure the size of the test piece. 1013{'b': 1', '18', '31, 'the main frame (ZJ) comprises a base (), a support plate (), a force-deformation combined sensing mechanism, a drive device () and a cross-section measuring and locating support;'}{'b': 1', '4', '24', '4', '18', '1', '1', '18', '1', '4', '18', '17', '17', '4', '19', '18, 'the base () has a box-shaped structure, the upper surface of a top plate of the base is flat, a sliding bearing () is arranged at the center of the top plate, the axis of the sliding bearing is in the vertical direction, and four threaded holes () are symmetrically distributed around the sliding bearing (); the support plate () is a trapezoid thick plate vertically fixed to the upper portion of the top plate of the base (), and its right end is close to the right end of the base (); the middle surface, namely, a longitudinal symmetry plane, of the support plate () is vertical to the right side face of the base () and passes through the axis of the sliding bearing (); the top of the support plate () has a horizontal protruded platform extending to the left side, a bearing hole () is machined in the protruded ...

SYSTEM AND PROCESS FOR MEASURING STRAIN IN MATERIALS AT HIGH SPATIAL RESOLUTION

A process for measuring strain is provided that includes placing a sample of a material into a TEM as a sample. The TEM is energized to create a small electron beam with an incident angle to the sample. Electrical signals are generated that control multiple beam deflection coils and image deflection coils of the TEM. The beam deflection control signals cause the angle of the incident beam to change in a cyclic time-dependent manner. A first diffraction pattern from the sample material that shows dynamical diffraction effects is observed and then one or more of the beam deflection coil control signals are adjusted to reduce the dynamical diffraction effects. One or more of the image deflection coil control signals are then adjusted to remove any motion of the diffraction pattern. A diffraction pattern is then collected from a strained area of the material after the adjusting step, and the strain is then determined from a numerical analysis of the strained diffraction pattern compared to a reference diffraction pattern from an unstained area of the material. 1. A process for measuring strain in crystalline materials comprising:placing a sample of a material into a transmission electron microscope as a specimen; andenergizing the transmission electron microscope to create an electron beam with an incident angle to the material; andgenerating electrical beam deflection coil control signals that control a plurality of beam deflection coils of the transmission electron microscope; andgenerating electrical image deflection coil control signals that control a plurality of image deflection coils of the transmission electron microscope;viewing a first diffraction pattern from the material with dynamical diffraction effects;adjusting at least one of the beam deflection coil control signals to reduce the dynamical diffraction effects;adjusting at least one of the image deflection coil control signals to stop the motion of the diffraction pattern induced by the beam deflection ...

APPARATUS AND METHOD FOR MATERIAL TESTING

An example material testing apparatus () includes: guide means (); sample test means () for holding a sample () and applying a test force to the sample (); a crosshead () arranged to support at least a portion the sample test means (), wherein the crosshead () is moveable about the guide means (); crosshead drive means () for moving the crosshead () generally vertically about the guide means (), wherein the crosshead drive means () is driven by an electric machine () in a driving configuration; and a controller () arranged to: configure the electric machine () into the driving configuration; control the crosshead drive means () to move the crosshead () generally vertically about the guide means (); and configure the electric machine () into a braking configuration, wherein in the braking configuration a winding of the electric machine () is connected together with a low resistance connection. 1. A material testing apparatus , comprising:guide means;sample test means for holding a sample and applying a test force to the sample;a crosshead arranged to support at least a portion the sample test means, wherein the crosshead is moveable about the guide means;crosshead drive means for moving the crosshead generally vertically about the guide means, wherein the crosshead drive means is driven by an electric machine in a driving configuration; anda controller arranged to:configure the electric machine into the driving configuration;control the crosshead drive means to move the crosshead generally vertically about the guide means; andconfigure the electric machine into a braking configuration, wherein in the braking configuration a winding of the electric machine is connected together with a low resistance connection.2. The apparatus of claim 1 , wherein the controller is arranged to configure the electric machine into the braking configuration after controlling the crosshead drive means to vertically move the crosshead.3. The apparatus of claim 2 , wherein the controller is ...

TESTING APPARATUS FOR APPLYING TEST LOAD USING VACUUM PRESSURE

A testing apparatus for applying a test load to a specimen, comprises a cradle and a test bed supported on the cradle. The test bed has a chamber which receives a specimen and is hermetically sealed with the specimen received inside. There is a vacuum source in communication with the chamber. The vacuum source provides vacuum pressure to the chamber, thereby applying a uniform load to the specimen. 1. (canceled)2. (canceled)3. (canceled)4. The testing apparatus of claim 17 , wherein the dampening mechanism includes a plurality of spring assembles.5. The testing apparatus of claim 4 , wherein each of the spring assemblies includes a spring and a bolt received by the spring.6. The testing apparatus of claim 17 , further including a flange extending outwardly from the test bed and a flange extending outwardly from the cradle claim 17 , wherein the dampening mechanism includes a shock absorber disposed between the flange of the test bed and the flange of the cradle.7. (canceled)8. The testing apparatus of claim 17 , further including a pressure gauge which measures pressure within the test bed.9. The testing apparatus of claim 17 , further including an exhaust port to vent the test bed.10. The testing apparatus of claim 17 , wherein the vacuum source is a vacuum pump.11. The testing apparatus of claim 17 , wherein the specimen is a scaffold deck.12. (canceled)13. (canceled)14. The testing apparatus of claim 17 , further including a pair of rods extending between the rails claim 17 , each of the rods being supported on opposite support brackets claim 17 , the rods engaging the specimen to support the specimen in an elevated position above the bottom of the test bed.15. The testing apparatus of claim 17 , wherein the bottom of the test bed includes a plurality of tubes extending perpendicularly along a length of the test bed.16. The testing apparatus of claim 17 , further including a plurality of spacers disposed between the specimen and the test bed.17. A testing ...

METHOD FOR ASSESSING A WEAR STATE OF A MODULE OF A TURBOMACHINE, MODULE, AND TURBOMACHINE

A method of evaluating a wear state of an assembly of a flow machine, in particular, of a bearing arrangement of a pump or turbine. For determining a wear characteristic, a mechanical query signal having a pre-definable signal shape is generated by a signal generator and a response signal generated from the query signal is detected using a sensor in contact with the assembly. The response signal is varied in dependence on a variation of a physical operating value of the assembly in accordance with a characteristic pattern, the wear characteristic is determined from the variation of the response signal and the wear state is evaluated using the wear characteristic. 1. A method of evaluating a wear state of an assembly of a flow machine , including a bearing arrangement of a pump or turbine , comprising:for determining a wear characteristic, generating a mechanical query signal having a predefinable signal shape by a signal generator;detecting a response signal generated from the query signal by a sensor in contact with the assembly; andchanging the response signal in dependence on a variation of a physical operating value of the assembly in accordance with a characteristic pattern, in that the wear characteristic is determined from the change in the response signal and in that the wear state is evaluated using the wear parameter.2. A method in accordance with claim 1 , wherein the signal generator and the sensor are integrated in a sensor module.3. A method in accordance with claim 1 , wherein the signal generator is configured to operate as a sensor for the detection of the response signal.4. A method in accordance with claim 1 , further comprising transmitting the query signal wirelessly to the signal generator by a signal source; or transmitting the response signal wirelessly to an evaluation unit.5. A method in accordance with claim 1 , wherein the signal generator or the sensor or the sensor module comprise a piezoelectric material.6. A method in accordance with ...

OLIGOCYCLIC FATIGUE OR OLIGOCYCLIC AND POLYCYCLIC FATIGUE TEST RIG

Low-cycle, and optionally combined low-cycle and high-cycle, fatigue test rig, for reproducing bearing of turbine engine parts, comprising a support member which is fixed to a frame and defines at least one bearing surface, and a test piece which is connected to traction means for loading the test piece so that it bears against the or each bearing surface of the member, the or each bearing surface being supported by an element which is mounted so as to rotate about a first axis on the support member, and the test piece being connected to the traction means by means for articulation around a second axis which is substantially perpendicular to the first axis, the rig further comprising means for adjusting and locking the element and the test piece in positions around the above-mentioned axes wherein. 1. Low-cycle , and optionally and/or high-cycle , fatigue test rig , for reproducing bearing of turbine engine parts , including at least one blade root bearing against a recess contact surface of a rotor disc , said test rig comprising a support member which is fixed to a frame and defines at least one bearing surface , and a test piece which is connected to traction means for loading the test piece so that it bears against the or each bearing surface of the member , wherein the at least one bearing surface is supported by an element which is mounted so as to rotate about a first axis on the support member , and in that the test piece is connected to the traction means by means for articulation around a second axis which is substantially perpendicular to the first axis , and in that it further comprises means for adjusting and locking the element and the test piece in positions around the above-mentioned axes.2. Test rig according to claim 1 , wherein the element comprises a substantially cylindrical outer surface which cooperates with a surface which is substantially complementary to the support member to guide the element in rotation about the first axis.3. Test rig ...

MEMS

Embodiments provide a MEMS including a MEMS device and an detector circuit. The MEMS device includes a membrane, wherein a material of the membrane comprises a band gap and a crystal structure with structural elements (unit cells) connected by covalent bonds in two dimensions only. The detector circuit is configured to determine a deformation of the membrane based on a piezoresistive resistance of the material of the membrane. 1. A MEMS , comprising:a MEMS device comprising a membrane, wherein a material of the membrane comprises a band gap and a crystal structure with structural elements connected by covalent bonds in two dimensions only; anda detector circuit configured to determine a deformation of the membrane based on a piezoresistive resistance of the material of the membrane.2. The MEMS according to claim 1 , wherein the material of the membrane is a transition metal chalcogenide.3. The MEMS according to claim 1 , wherein the material of the membrane is one out of MoS claim 1 , WS claim 1 , MoTe claim 1 , MoSe claim 1 , WSe claim 1 , WTe claim 1 , VSe claim 1 , CrS claim 1 , CrSe claim 1 , BP.4. The MEMS according to claim 1 , wherein the MEMS device comprises a support having a cavity therethrough claim 1 , wherein the membrane extends over the support cavity.5. The MEMS according to claim 4 , wherein the support is a dielectric spacer.6. The MEMS according to claim 4 , wherein the MEMS device comprises a substrate claim 4 , wherein the support is arranged on the substrate.7. The MEMS according to claim 6 , wherein the substrate comprises a cavity therethrough claim 6 , wherein the support is arranged such that the cavity of the support extends over the cavity of the substrate.8. The MEMS according to claim 1 , wherein the MEMS device comprises an inertial mass attached to the membrane.9. The MEMS according to claim 1 , wherein the MEMS device comprises two electrodes contacting the membrane on spaced apart positions claim 1 , wherein the detector circuit is ...

Tapping Hammer for Tapping Test

The present invention provides a tapping hammer for tapping test, which can help a user to accurately control the tapping force during a tapping test. The tapping hammer comprises a hammerhead and a handle supporting the hammerhead, and further comprises an alarm, a power source and a conductor, a hollowed-out region is provided in the interior of the hammerhead, the hammerhead is elastically deformable and electrically connected to a first electrode of the power source; the conductor is fixed in the interior hollowed-out region, not electrically connected to the hammerhead while no tapping force is exerted on the hammerhead and electrically connected to the hammerhead while a tapping force larger than a certain amount is exerted on the hammerhead; a first electrode of the alarm is connected to the conductor, a second electrode of the alarm is connected to a second electrode of the power source. 1. A tapping hammer for tapping test , comprising a hammerhead and a handle supporting the hammerhead , the tapping hammer further comprises an alarm , a power source and a conductor , wherein ,a hollowed-out region is provided in interior of the hammerhead and the hammerhead is elastically deformable, the hammerhead is electrically connected to a first electrode of the power source;the conductor is fixed in the interior hollowed-out region of the hammerhead, the conductor is not electrically connected to the hammerhead while no tapping force is exerted on the hammerhead, and the conductor is electrically connected to the hammerhead while a tapping force larger than a certain amount is exerted on the hammerhead; anda first electrode of the alarm is connected to the conductor, a second electrode of the alarm is connected to a second electrode of the power source.2. The tapping hammer of claim 1 , wherein the conductor is fixed to a non-stress surface of the hammerhead.3. The tapping hammer of claim 1 , wherein a distance between the conductor and an inner surface of the ...

METHOD AND DEVICE FOR LOADING SPECIMENS INTO TENSILE TESTING MACHINE

A sample loading device may include a top plate and a base plate, and the sample loading device can be roughly divided into two portions: a loading portion and a holding portion. The present invention is advantageous because the test sample is introduced by the sample loading device, which has been designed for a standard T-peel test, so the integrity of the sample introducing process will not be affected even though a different operator is conducting the process. Furthermore, it is easy to for the operator to load the test sample to the sample loading device, as well as transferring the sample loading device to the tensile testing machine, so the errors during the sample loading process can be significantly reduced. In other words, the T-peel test results can be more reliable when the test sample is introduced by the sample loading device in the present invention. 1. A sample loading device for measuring the seal strength in flexible barrier materials comprising a loading portion and a holding portion , said the loading portion having a top plate and a base plate , said loading portion having a receiving groove on the top plate , and a gap formed on the loading portion between the top plate and the base plate , wherein the loading portion is configured to receive and hold a test sample with a predetermined configuration , and holding portion is configured to be held by hand to transfer the loaded test specimen to a tensile testing machine.2. The sample loading device of claim 1 , wherein the test sample is a T-type specimen having a sealed portion and two wing portions extending from one end of the sealed portion.3. The sample loading device of claim 2 , wherein the receiving groove is formed at a predetermined distance from a center portion of the top plate of the loading portion to receive the sealed portion of the T-type specimen claim 2 , while the wing portions are slid into the gap on the loading portion between the top plate and base plate.4. The sample ...

JIG FOR ULTRASONIC FATIGUE TESTING MACHINE

A pair of jigs has the same mass and a weight is adjusted in consideration of a test piece shape so that stress of a center portion of a test piece becomes a desired value. That is, the jig serves as a weight adjustment tool for adjusting a resonance frequency and stress of the test piece. The upper and lower jigs are attached to both ends of the test piece S so that the center of gravity of the upper jig and the center of gravity of the lower jig are located on a perpendicular line passing through the center portion of the test piece. 1. A jig for an ultrasonic fatigue testing machine used in a fatigue test in which a vibration generated from an ultrasonic transducer is amplified by a horn and a test piece connected to a front end of the horn is resonated , comprising:a main body portion; anda grip portion holding an end of the test piece,wherein the jig is attached to both ends of the test piece to adjust the mass of both ends of the test piece.2. The jig for the ultrasonic fatigue testing machine according to claim 1 ,wherein an end of the main body portion opposite to the grip portion is provided with a screw portion to be connected to the horn.3. The jig for the ultrasonic fatigue testing machine according to claim 1 ,wherein when an end of the main body portion is connected to the horn, an adjustment plate is inserted between the main body portion and the horn, andwhen the end of the main body portion serves as a free end, the adjustment plate is attached to the free end to adjust the mass of both ends of the test piece.4. The jig for the ultrasonic fatigue testing machine according to claim 1 ,wherein the grip portion includes a pressing force generation member that sandwiches the end of the test piece by a pressing force using a screw when holding the end of the test piece.5. The jig for the ultrasonic fatigue testing machine according to claim 4 ,wherein the mass of both ends of the test piece is adjusted by changing the weight of the pressing force ...

RIG

A rig for testing mode II fatigue of a composite component. The rig includes a clamp for clamping one end of the component. A first contact arrangement is provided for contacting one side of the component and a second contact arrangement is provided for contacting an opposing side of the component, the first and second contact arrangements being spaced from the clamp. A loading fork is provided for applying load to the component. The loading fork includes a first and a second portion arranged such that in use, when the loading fork is loading the component in one direction the first portion contacts the first contact arrangement and the second portion is spaced from the second contact arrangement, and when the loading fork is loading the component in an opposite direction the first portion is spaced from the first contact arrangement and the second portion contacts the second contact arrangement. 1. A method of testing a composite component in mode II fatigue using a rig comprising:a clamp for clamping one end of the component;a first contact arrangement for contacting one side of the component and a second contact arrangement for contacting an opposing side of the component, the first and second contact arrangements being spaced from the clamp; anda loading fork for applying load to the component; wherein the loading fork comprises a first portion and a second portion arranged such that in use, when the loading fork is loading the component in one direction the first portion contacts the first contact arrangement and the second portion is spaced from the second contact arrangement, and when the loading fork is loading the component in an opposite direction the first portion is spaced from the first contact arrangement and the second portion contacts the second contact arrangement, the method comprising:clamping the component to the rig using the clamp;attaching the first and second contact arrangements to the composite component at a position spaced from the clamp; ...

APPARATUS AND METHOD FOR MATERIAL TESTING

According to an embodiment of the present invention there is provided a material testing apparatus (), comprising: guide means (); sample holding means () for holding a sample (); force means () comprising a first actuator () for applying a releasable force to the sample (); a crosshead () supported on the guide means () and arranged to support at least a portion of one or both of the sample holding means () and the force means (); an energy store () arranged to store regenerative energy from at least the first actuator (); an energy consumer () arranged to, at least in part, consume energy from the energy store (), wherein the energy consumer () comprises the first actuator (); and a controller () configured to control the first actuator () to release the force applied to the sample (), wherein the first actuator () is arranged to output the regenerative energy in dependence on the release of the force.

DISSOCIATEDLY FABRICATED GRIPS FOR ADDITIVELY MANUFACTURED COUPONS AND METHODS

A manufacturing method that includes fabricating a component using an additive manufacturing process, and fabricating a coupon using the additive manufacturing process. The coupon includes a main portion and a grip portion. Fabrication of the coupon includes fabricating the main portion concurrently with the fabrication of the component, fabricating the grip portion dissociatedly from the fabrication of the component, and coupling a first end of the main portion with the grip portion to form the coupon. 1. A manufacturing method , comprising:fabricating a component using an additive manufacturing process; andfabricating a coupon using the additive manufacturing process, the coupon comprising a main portion and a grip portion, fabricating the main portion concurrently with the fabricating of the component;', 'fabricating the grip portion dissociatedly from the fabricating of the component;, 'wherein the fabricating the coupon comprises 'coupling a first end of the main portion with the grip portion to form the coupon.', 'and'}2. The method of claim 1 , wherein the fabricating the main portion concurrently comprises fabricating each layer of the main portion with a corresponding layer of the component at the same time using the same additive manufacturing process.3. The method of claim 1 , wherein the coupling the main portion with the grip portion comprises applying an adhesive between the main portion and the grip portion.4. The method of claim 1 , wherein the first end of the main portion comprises a geometric structure configured to be coupled with a corresponding geometric structure of the grip portion.5. The method of claim 4 , wherein the geometric structure comprises a plurality of concentric ring-shaped structures.6. The method of claim 5 , wherein the plurality of concentric ring-shaped structures of the first end of the main portion is configured to be interleaved with the plurality of concentric ring-shaped structures of the grip portion.7. The method of ...

MATERIAL TESTING MACHINE AND CONTROL DEVICE OF MATERIAL TESTING MACHINE

A tensile testing machine includes: a testing machine body that executes a tensile test; an instruction reception unit that receives an operation instruction for the testing machine body on the basis of an operation from a user; and an instruction storage unit that stores contents and an order of instruction information indicating the operation instruction, which is received by the instruction reception unit, for the testing machine body. 1. A material testing machine comprising:a testing machine body that executes a material test;an instruction reception unit that receives an operation instruction for the testing machine body on a basis of an operation from a user; andan instruction storage unit that stores contents and an order of instruction information indicating the operation instruction, which is received by the instruction reception unit, for the testing machine body.2. The material testing machine according to claim 1 , further comprising:a list generation unit that generates an operation instruction list indicating the contents and the order of the instruction information; anda display control unit that displays the operation instruction list on a display.3. The material testing machine according to claim 2 , further comprising:an operation control unit that operates the testing machine body on a basis of the operation instruction list.4. The material testing machine according to claim 3 , whereinthe display control unit displays the operation instruction list on the display such that the instruction information corresponding to an operation being executed by the testing machine body is visually recognizable.5. The material testing machine according to claim 2 , further comprising:an update unit that receives an update operation of the user for the operation instruction list and updates the operation instruction list in accordance with the update operation.6. The material testing machine according to claim 1 , further comprising:a recording unit that ...

DROP TEST APPARATUS

A drop test apparatus includes a frame, a first blocking board, a second blocking board, two first pivot poles and two second pivot poles. The frame includes a base board and a holding board above the base board for holding a tested product. The first blocking board is located between the base board and the holding board for placing the tested product when the tested product is dropped from the holding board. The second blocking board is secured to the base board. The two first pivot holes and the second two pivot poles are connected the first blocking board with the second blocking board, and a distance between the first blocking board and the second support is adjusted. 1. A drop test apparatus comprising:a frame, the frame comprises a base board and a holding board above the base board, and the holding board configured for hold a tested product;a first blocking board located between the base board and the holding board and defining a plurality of locking slots, and the first blocking board configured for catching the tested product when the tested product is dropped from the holding board;a second blocking board secured to the base board, and the second blocking board defining a plurality of latching slots;two first pivot poles, a first rotating end of each of the two first pivot poles rotatably secured to the first blocking board, and a second rotating end opposite to the first rotating end engaged in one of the plurality of latching slots; andtwo second pivot poles rotatably secured to the two first pivot poles, a first pivot end of each of the two second pivot poles rotatably secured to the second blocking board, and a second pivot end opposite to the first pivot end engaged in one of the plurality of locking slots;wherein a distance between the first blocking board and the second blocking board is adjusted when the second rotating end of each of the two first pivot poles is moved out from the one of the plurality of latching slots, and the second pivot end of ...

LOAD TESTING SYSTEM AND DEVICE FOR SUSTAIN LOAD MEASUREMENT OVER TIME IN DIFFERENT ENVIRONMENTAL CONDITIONS

There is provided a load testing system comprising a load frame device adapted to load test one or more test specimens and to generate load test measurements; one or more environment controlling chambers adapted to be positioned within the load testing frame for subjecting the one or more test specimens to desired environmental conditions; one or more environment condition regulators adapted to be connected to the one or more environment controlling chambers for regulating the desired environmental conditions; a data acquisition device for receiving sustain load measurements of the one or more test specimens and environmental condition measurements to which the one or more test specimens are subjected during the load test; and a load monitoring device adapted to be connected to the data acquisition device for receiving and monitoring the sustain load measurements and the corresponding environmental condition measurements as a function of time. 1. A load frame device comprising:a top plate;a base plate; and a pair of pillars supported at one end by the top plate;', 'a crosshead to be mounted and to move along the pair of pillars;', 'a first pair of jaws to be coupled to the crosshead and to hold and secure in place a first portion of one or more test specimens;', 'wherein the power screw engages a force on the cross head for moving the cross head depending on a load desired;', 'a power screw to be in physical contact with the crosshead through an opening in the top plate for applying a force thereon for engaging the first pair of jaws to move along the pair of pillars;'}, 'a base plate;', 'a load cell to be securely seated and coupled to the base plate; and', 'a second pair of jaws to be connected to the load cell such that the force applied on the second pair of jaws is transferred to the load cell for measurement., 'one or more load testing frames, each one comprising2. The load frame device as claimed in claim 1 , wherein the one or more load testing frames ...

Bionic oral cavity structure for testing and application thereof

A bionic oral cavity structure for testing and application thereof are provided for solving a technical problem that actual test process of the conventional bionic oral cavity structure needs to be improved. The bionic oral cavity structure for testing includes: an upper jaw, a lower jaw, a drive unit, a sensor and a controller, wherein a gum is made of a soft elastic material, and a base of the gum has a through-hole; a cap is formed by extending upward from a top opening of the through-hole; the tooth comprises a molar made of a hard material, and an implant; a top end of the implant passes through the through-hole of the gum and then extends into the cap; the gum and the implant are detachably mounted on the mounting plate; the sensor is a flexible sensor which covers the cap. 1. A bionic oral cavity structure for testing , comprising: an upper jaw , a lower jaw , a drive unit , a sensor and a controller , wherein each of the upper jaw and the lower jaw comprises a tooth , a gum and a mounting plate; the tooth , the gum , and the mounting plate of the upper jaw are mounted on a static platform , and the static platform is mounted on a frame; the tooth , the gum , and the mounting plate of the lower jaw are installed on a movable platform , and the movable platform is connected to the drive unit , thereby moving up and down as well as left and right; the drive unit and the sensor are both electrically connected to the controller; wherein:the gum is made of a soft elastic material, and a base of the gum has a through-hole drilled from top to bottom; a cap is formed by extending upward from a top opening of the through-hole; the tooth comprises a molar made of a hard material, and an implant; a top end of the implant passes through the through-hole of the gum and then extends into the cap; the gum and the implant are detachably mounted on the mounting plate; the sensor is a flexible sensor which covers the cap; the flexible sensor is provided with at least one ...

BONDING FORCE TEST DEVICE

Disclosed herein is a bonding force test device, including: a holder mounted with a sample to which a plurality of subjects to be tested are bonded; a rotating part rotating the holder; and a fixing tip disposed in a direction in which the fixing tip faces the holder, wherein at the time of rotating the holder, the fixing tip contacts any one of the subjects to be tested in the sample and a shearing stress is applied to a bonded portion between the fixing tip and any one subject to be tested. 1. A bonding force test device , comprising:a holder mounted with a sample to which a plurality of subjects to be tested are bonded;a rotating part rotating the holder; anda fixing tip disposed in a direction in which the fixing tip faces the holder,wherein at the time of rotating the holder, the fixing tip contacts any one of the subjects to be tested in the sample and a shearing stress is applied to a bonded portion between the fixing tip and any one subject to be tested.2. The bonding force test device as set forth in claim 1 , wherein the holder includes:a cover part having the sample mounted thereon;a coupling frame having the cover part coupled therewith; anda fixing member fixing the cover part to the coupling frame.3. The bonding force test device as set forth in claim 2 , wherein the cover part is provided with an insertion groove into which one portion of the sample is inserted.4. The bonding force test device as set forth in claim 3 , wherein the insertion groove has a rectangular pillar shape.5. The bonding force test device as set forth in claim 2 , wherein the fixing member is a screw.6. The bonding force test device as set forth in claim 5 , wherein the coupling frame is provided with a coupling hole through which the screw penetrates claim 5 , andthe cover part is provided with a screw groove with which the screw coupled with the coupling hole is coupled.7. The bonding force test device as set forth in claim 1 , wherein the rotating part is a motor.8. The ...

METHOD FOR EVALUATING SEMICONDUCTOR WAFER AND APPARATUS FOR EVALUATING SEMICONDUCTOR WAFER

The present invention provides a method for evaluating a semiconductor wafer concerning a breaking strength of a notch portion of the semiconductor wafer, comprising: applying a load to a notch portion of the semiconductor wafer to be evaluated toward the center of the wafer such that the notch portion of the semiconductor wafer is broken; and evaluating the breaking strength of the notch portion. The present invention provides a method and an apparatus for evaluating a semiconductor wafer that can evaluate the breaking strength of a notch portion of a semiconductor wafer with higher precision and higher sensitivity. 19-. (canceled)10. A method for evaluating a semiconductor wafer concerning a breaking strength of a notch portion of the semiconductor wafer , comprising:applying a load to the notch portion of the semiconductor wafer to be evaluated toward the center of the wafer such that the notch portion of the semiconductor wafer is broken; andevaluating the breaking strength of the notch portion.11. The method for evaluating a semiconductor wafer according to claim 10 , wherein the load is applied by pressing a pin against the notch portion.12. The method for evaluating a semiconductor wafer according to claim 10 , wherein the load is applied in a manner of a vertical static pressure load or a horizontal static pressure load.13. The method for evaluating a semiconductor wafer according to claim 11 , wherein the load is applied in a manner of a vertical static pressure load or a horizontal static pressure load.14. The method for evaluating a semiconductor wafer according to claim 10 , wherein the breaking strength of the notch portion is evaluated in such a manner that a test piece including the notch portion is cut from the semiconductor wafer to be evaluated; the test piece is interposed and held between a pair of holding jigs; and a load is applied to the notch portion of the held test piece.15. The method for evaluating a semiconductor wafer according to claim ...

MEASUREMENT DEVICE FOR MEASURING DYNAMOMETRIC FEATURES OF ELONGATED TEXTILE SAMPLES OF THE YARNS, THREADS, TAPES TYPE AND THE LIKE

A measurement device () for measuring dynamometric features of elongated textile samples of the yarns, threads, tapes type and the like, such a device () comprises a first clamp (), a second clamp () that is substantially aligned and relatively movable with respect to the first clamp () along a first translation direction (A), wherein each of the first clamp () and the second clamp () comprises a fixed jaw () and a movable jaw () in relation to the respective fixed jaw along a second translation direction (B) substantially orthogonal to the first translation direction (A) and wherein the movable jaw () is movable between a resting position, in which it is spaced apart with respect to the respective fixed jaw (), and an operating position, in which it is near to the respective fixed jaw () in order to clamp a respective portion of an elongated textile sample against it, first force detection means () that are coupled with the first clamp () for detecting the tensile force applied to the textile sample, and second movement detection means for detecting the relative movement of the second clamp () with respect to the first clamp (), the device () being characterized in that at least one of the fixed jaw () and the movable jaw () of at least one of the first clamp () and the second clamp () comprises a base body () to which a clamping body () is coupled, said clamping body () being provided with a clamping surface () that faces a corresponding surface of the other respective fixed jaw or mobile jaw for clamping a respective portion of textile sample against it, wherein such a clamping body () is coupled to the respective base body () so as to be able to oscillate about at least two axes different from each other. 210261928) Device () according to claim 1 , characterized in that said clamping body () is coupled to said base body () by means of a spherical joint ().31019322628) Device () according to claim 2 , characterized in that said base body () supports a stem () ...

TENSILE TEST FIXTURE FOR QUICK TESTING OF MATERIALS WITH LOW TRANSVERSE STRENGTH

A tensile test fixture for quick testing of materials with low transverse strength and relatively high longitudinal strength. After the tensile test fixture is loaded into a universal testing machine, such as a two-part load frame, a first test specimen is aligned and tensile tested. Alignment of the first test specimen ensures that all consecutive test specimens are aligned within the tensile test fixture without further alignment required. 1. A tensile test fixture for testing materials with low transverse strength , the test fixture comprising:a bearing plate comprising a slot extending from an edge of the bearing plate to the center of the bearing plate and a T-plate, wherein the bearing plate and the T-plate are spaced apart from each other by at least two threaded rods; anda lock plate mounted to a surface of the bearing plate and comprising an aperture defined therethrough;wherein a test specimen is operable to be received through a central aperture defined by the slot in the bearing plate and the aperture in the lock plate.2. The tensile test fixture of claim 1 , wherein the bearing plate and the T-plate each comprise at least two threaded apertures operable to receive a corresponding number of the threaded rods claim 1 , and wherein the threaded rods can be rotated to adjust the distance between the bearing plate and the T-plate.3. The tensile test fixture of claim 2 , wherein the bearing plate and the T-plate are each square-shaped and each comprise four threaded apertures located proximate to the corners of the plates.4. The tensile test fixture of claim 1 , wherein the lock plate is a two-part plate and each half of the two-part lock plate comprises half of the lock plate aperture claim 1 , and wherein the lock plate is operable to be received around the test specimen.5. The tensile test fixture of claim 4 , wherein the lock plate is mounted on a distal surface of the bearing plate.6. The tensile test fixture of claim 4 , wherein the aperture of the lock ...

SOFT ROCK SHEAR RHEOLOGICAL TEST SYSTEM WITH SIMULATION OF COUPLED RAINFALL SEEPAGE AND BLASTING VIBRATIONS

The disclosure relates to a soft rock shear rheological test system with simulation of coupled rainfall seepage and blasting vibrations, which is at least provided with a loading device and a shear box. The loading device includes a frame (), a normal static load electric cylinder () disposed on a top of the frame () and a normal dynamic load electric cylinder () disposed on a lower portion of the frame (), a horizontal static load electric cylinder () and a horizontal dynamic load electric cylinder () disposed on both sides of the frame (), and a reaction post (). This test system can perform a dry-wet cycle operation on the test specimen without disassembling the shear box during the shear rheological test, and can truly simulate influences of rainfall seepage and blasting vibrations on the shear rheological effect of soft rock. 1. A soft rock shear rheological test system with simulation of coupled rainfall seepage and blasting vibrations , which is at least provided with a loading device and a shear box;wherein, the loading device includes a frame, a normal static load electric cylinder, a normal dynamic load electric cylinder, a horizontal static load electric cylinder, a horizontal dynamic load electric cylinder and a reaction post;a frame beam is disposed at the middle portion of the frame, and support legs are disposed at a bottom portion of the frame;the normal static load electric cylinder is disposed on a top of the frame, and the normal dynamic load electric cylinder is disposed on a lower portion of the frame;an indenter of the normal static load electric cylinder and an indenter of the normal dynamic load electric cylinder lie in a same central line;the horizontal static load electric cylinder and the horizontal dynamic load electric cylinder are disposed on both sides of the frame, and an indenter of the horizontal static load electric cylinder and an indenter of the horizontal dynamic load electric cylinder lie in a same central line;the reaction ...

SHEAR BOX OF SHEAR RHEOLOGY EXPERIMENT OF A SOFT ROCK FOR SIMULATING THE COUPLING OF THE RAINFALL SEEPAGE AND BLASTING VIBRATION

A shear box of shear rheology experiment of a soft rock for simulating the coupling of the rainfall seepage and blasting vibration includes an upper shear box, a lower shear box, a normally-loading indenter, a normally-loading cushion block and a test piece joint. The upper shear box is tightly connected to the lower shear box by a vertical roll. The vertical roll passes through the through holes at both sides of the upper shear box and is engaged with the lower shear box through female thread connection holes. The normally-loading indenter passes through a circular through hole and presses against the normally-loading cushion block. The first end of the test piece joint is installed into a water or gas outlet hole, and the second end of the test piece joint is directly mortised into a rock test piece. 1. A shear box of a shear rheology experiment of a soft rock for simulating a coupling of a rainfall seepage and a blasting vibration , comprising an upper shear box , a lower shear box , a normally-loading indenter , a normally-loading cushion block , and a test piece joint; wherein:the upper shear box is provided with an upper top plate and an upper shear body, and the upper top plate is fastened and connected to the upper shear body by first hexagon fillister head socket screws; the lower shear box is provided with a lower shear body and a lower base plate, the lower shear body is fastened and connected to the lower base plate by second hexagon fillister head socket screws;the upper shear box is tightly connected to the lower shear box by a vertical roll; through holes are provided at both sides of the upper shear box, and female thread connection holes are provided at both sides of the lower shear box; the vertical roll passes through the through holes at the both sides of the upper shear box and the vertical roll engages with the lower shear box through the female thread connection holes; the vertical roll is movable within a range of the through holes at the ...

CONTINUOUS DETERMINATION OF MEDIUM STIFFNESS AND LOAD GAIN FOR ADAPTIVE ACTUATOR CONTROL

An actuator control system, mechanical testing system, and method for adaptive control of an actuator of a mechanical testing device may include determining a stiffness of a medium that the actuator is moving through and/or load gain of the actuator, wherein the stiffness and load gain is determined by generating a waveform to actuate the actuator until a load sensor signal and/or a displacement sensor signal is received, and controllably moving the actuator through the medium according to a predefined constant velocity by calculating a current request using the stiffness of the medium, and/or adjusting the load of the actuator in accordance with a constant load ramp rate. 1. A method for adaptive control of an actuator of a mechanical testing device , the method comprising:determining a stiffness of a medium that the actuator is moving through, wherein the stiffness is determined by generating an actuator current waveform to actuate the actuator until a displacement sensor signal is received; andcontrollably moving the actuator through the medium according to a predefined constant velocity by calculating a current request using the stiffness of the medium.2. The method of claim 1 , wherein the stiffness is at least one of: a ratio of a load amplitude to an amplitude of a current request associated with the waveform claim 1 , a ratio of a displacement amplitude to an amplitude of the current request associated with the waveform claim 1 , or a gain equal to a slope of a force measured by the load sensor to the current request claim 1 , a slope of displacement measured by the displacement sensor and the current request claim 1 , which are obtained by the load sensor signal and the displacement sensor signal.3. The method of claim 1 , wherein the waveform is a small signal claim 1 , carrier waveform having a frequency between 3 Hz and 10 Hz.4. The method of claim 1 , wherein the method is performed prior to or after a testing cycle to accommodate a utility adjustment ...

Determination of dynamic parameters for adaptive actuator control

An actuator control system, mechanical testing system, and method for adaptive control of an actuator of a mechanical testing device is provided. The method may include applying a mechanical load to the specimen with the actuator, resulting in receiving a load sensor signal from a load sensor and a displacement sensor signal from a displacement sensor, determining a plurality of dynamic characteristics of the mechanical testing device throughout a length of the test from data received from the load sensor signal and the displacement sensor signal, and controlling the actuator based on the plurality of dynamic characteristics to adapt the actuator to track a desired performance of the actuator.

APPARATUS AND METHODS OF MECHANICAL TESTING MATERIALS

An apparatus and method to strength test porous ceramic honeycomb bodies. The apparatus includes an interlayer between at least one platen and a surface of the high porosity honeycomb body to be tested. The method includes disposing at least one interlayer between at least one platen and an end face of the body, applying a force to the high porosity ceramic honeycomb body and monitoring a result of applying the force. The interlayer comprises a surface weight of about 350 g/mand a thickness in a direction N between facing surfaces load platens of at least about 20 mm. Axial and radial localized stamping tests also strength test porous ceramic honeycomb bodies. 1. A mechanical testing apparatus to test the mechanical strength of a specimen of material , the apparatus comprising:a first platen and a second platen comprising facing surfaces configured to apply a force to the specimen of material when disposed between the facing surfaces of the first platen and the second platen; 'the facing surface of the first platen and the specimen of material, and the facing surface of the second platen and the specimen of material, wherein the first platen and the second platen comprise a hardness greater than the at least one intermediate platen; and', 'at least one intermediate platen configured to be disposed between at least one ofa controller configured to monitor a result when force is applied to the specimen disposed between the first platen and the second platen,{'sup': '2', 'wherein the at least one intermediate platen comprises a surface weight of about 350 g/mand a thickness in a direction N between the facing surfaces of the first platen and the second platen of at least about 20 mm.'}2. The apparatus of claim 1 , wherein the at least one intermediate platen comprises:a first laminate comprising a facing surface configured to contact the facing surface of the first platen or the second platen,a second laminate disposed on an opposite surface of the first laminate, anda ...

Deformation Tester

Provided is a deformation tester where a specimen is deformed after starting and can be observed and analyzed in any deformation state without removal. The tester includes: a detachable part repeating a relative displacement cycle of a second part to a first part, two portions of the specimen attached to a first and a second attachment portion of the first and the second part, the specimen deformed from a first to a second shape state and back to the first shape state during the cycle; and a main body part the detachable part is detachably attached to; wherein state retaining means for fixing a relative position of the second to the first part in at least one shape state is freely attachable to the detachable part mounted on the main body part and the detachable part with the state retaining means is freely attachable to the main body part. 1. A deformation testing apparatus comprising:a detachable part to repeat a deformation cycle of relative displacement of a second part relative to a first part to cause a specimen to undergo a predetermined deformation cycle from a first shape state to a second shape state and then back to the first shape state, at least two different portions of the specimen being held by a first attachment portion of the first part and a second attachment portion of the second part, respectively;a main body part to which the detachable part is attached in a freely attachable or detachable manner;wherein state retaining means to fix a relative position of the second part relative to the first part in at least one shape state of any shape state that the specimen could take is attachable to and detachable from the detachable part mounted to the main body part and wherein the detachable part itself to which the state retaining means is mounted is attachable to and detachable from the main body part.2. The deformation testing apparatus according to wherein the detachable part is configured to have a state retaining means mounting part for mounting ...

SYSTEMS AND METHODS FOR DETERMINING STRENGTH OF CYLINDRICAL STRUCTURES BY INTERNAL PRESSURE LOADING

In one embodiment, an apparatus, includes: a mandrel; an expansion cylinder, comprising: opposite first and second ends; an inner circumferential surface extending between the ends and characterized by an inner diameter, the inner circumferential surface defining a hollow cavity; an outer circumferential surface extending between the ends and characterized by an outer diameter that is greater than the inner diameter; and a plurality of slots extending from the inner circumferential surface to the outer circumferential surface and latitudinally oriented between the ends; and one or more base plates configured to engage one of the ends of the expansion cylinder. In another embodiment, a method includes: arranging an expansion cylinder inside a test cylinder; arranging a mandrel inside the expansion cylinder; applying a force to the mandrel for exerting a radial force on the expansion cylinder; and detecting one or more indicia of structural failure of the test cylinder. 1. An apparatus , comprising:a mandrel; opposite first and second ends;', 'an inner circumferential surface extending between the ends and characterized by an inner diameter, the inner circumferential surface defining a hollow cavity;', 'an outer circumferential surface extending between the ends and characterized by an outer diameter that is greater than the inner diameter; and', 'a plurality of slots extending from the inner circumferential surface to the outer circumferential surface and latitudinally oriented between the ends; and, 'an expansion cylinder, comprisingone or more base plates configured to engage one of the ends of the expansion cylinder,wherein the mandrel is physically configured to engage the expansion cylinder along the inner circumferential surface thereof for causing expansion thereof.2. The apparatus as recited in claim 1 , further comprising a test cylinder claim 1 , the test cylinder comprising:an inner circumferential surface characterized by an inner diameter; andan outer ...

PROCESS FOR NON-DESTRUCTIVE TESTING USING DIRECT STRAIN IMAGING

A process for non-destructive testing includes applying a photo-curable dye to a surface of an article, selectively curing an array of dots of the photo-curable dye on the surface, removing the photo-curable dye that has not been selectively cured, mechanically testing the article, and direct strain imaging the article during the mechanical testing based on the array of dots. 1. A process for non-destructive testing , the process comprising:applying a photo-curable dye to a surface of an article;selectively curing an array of dots of the photo-curable dye on the surface;removing the photo-curable dye that has not been selectively cured;mechanically testing the article; anddirect strain imaging the article during the mechanical testing based on the array of dots.2. The process as recited in claim 1 , wherein the array of dots includes a first array and a second array claim 1 , the first array having a first pitch and the second array having a second pitch different than the first pitch.3. The process as recited in claim 1 , wherein the article is an additive manufactured article.4. The process as recited in claim 1 , wherein the surface of the article includes a joint.5. The process as recited in claim 1 , wherein the selective curing is conducted by a laser.6. The process as recited in claim 5 , wherein claim 5 , for each dot of the array of dots claim 5 , the laser is oriented normal to the surface.7. The process as recited in claim 5 , wherein the laser is mounted on a robotic device configured to move relative to the part according to computer instructions.8. The process as recited in claim 1 , wherein the applying of the photo-curable dye to the article includes applying a film of the photo-curable dye.9. The process as recited in claim 1 , wherein the surface is in an internal cavity of the article.10. The process as recited in claim 1 , wherein the article is formed of solid rocket propellant.11. An article for non-destructive testing claim 1 , comprising:an ...

CONCRETE TEMPERATURE STRESS TESTING MACHINE SYSTEM AND TEMPERATURE DEFORMATION SELF-COMPENSATION METHOD

A concrete temperature stress testing machine system and a testing method are provided, in which the concrete temperature stress testing machine system includes: a concrete temperature stress testing machine and a walk-in environment simulation laboratory system; and the concrete temperature stress testing machine includes a testing machine host and a concrete test specimen area. The testing machine host includes a rear fixed end, a front fixed end, and a pair of steel shafts connected between the rear fixed end and the front fixed end. The concrete test specimen area includes a moveable cross-head, a fixed cross-head, and a left side formwork, a bottom formwork and a right formwork connected between the moveable cross-head and the fixed cross-head. 1. A concrete temperature stress testing machine system comprising a concrete temperature stress testing machine and a walk-in environment simulation laboratory system , wherein the concrete temperature stress testing machine is disposed within the walk-in environment simulation laboratory system , wherein the concrete temperature stress testing machine comprises:a testing machine host comprising a rear fixed end, a front fixed end, and a pair of steel shafts connected between the rear fixed end and the front fixed end;a concrete test specimen area comprising a moveable cross-head, a fixed cross-head, and a left side formwork, a bottom formwork and a right formwork connected between the moveable cross-head and the fixed cross-head;wherein the front fixed end and the fixed cross-head are connected through a fixed end connecting ferrule, the rear fixed end and the moveable cross-head are connected through a load cell and a moveable end connecting ferrule, and an outer side of the rear fixed end is connected to a servo motor;{'sub': 1', '1', '2, 'sup': −6', '−6', '−6, 'wherein the steel shaft is made from No. 4J36 invar whose thermal expansion coefficient αis 0.5˜2.5×10m/° C.; the rear fixed end, the front fixed end, the ...

PREPARATION DEVICE FOR PREPARING A SAMPLE OF TEXTILE FIBERS, IN PARTICULAR COTTON FIBERS, APPLICABLE TO ANALYSIS AND/OR MEASURING APPARATUSES FOR ANALYZING AND/OR MEASURING CHARACTERISTICS OF THE TEXTILE FIBERS FORMING SAID SAMPLE

The present invention refers to a preparation device () for preparing a sample of textile fibers, in particular cotton fibers, applicable to analysis and/or measuring apparatuses respectively for analyzing and/or measuring characteristics of the textile fibers forming said sample, wherein the preparation device () comprises a comb body () that can be coupled in a sliding manner along a rectilinear guide () that faces a perforated plate () against which to press a mass (M) of textile fibers forming protuberances projecting from the holes of the perforated plate (), wherein the comb body () is arranged to grip tufts of textile fibers from such protuberances and is characterized in that it comprises at least one brush () that is mounted in a sliding manner along a rectilinear guide facing the perforated plate () and that is arranged to brush the textile fibers forming the protuberances before the comb body grips said tufts. 2101412) Preparation device () according to claim 1 , characterized in that said at least one brush () is coupled in a sliding manner along said rectilinear guide ().310141112) Preparation device () according to claim 2 , characterized in that said at least one brush () is coupled to said comb body () so as to slide together with it along said rectilinear guide ().4101411) Preparation device () according to claim 1 , characterized in that said at least one brush () is coupled to said comb body () at the rear side thereof with respect to the sliding sense (V) of said comb body for picking up said tufts of textile fibers from said protuberances.510141111) Preparation device () according to claim 1 , characterized in that said at least one brush () is coupled to said comb body () at the front side thereof with respect to the sliding sense (V) of said comb body () for picking up said tufts of textile fibers from said protuberances.6101411) Preparation device () according to claim 1 , characterized in that said at least one brush () is coupled to said ...

MATERIAL PERFORMANCE TESTING SYSTEM UNDER FIXED MULTI-FIELD COUPLING EFFECT IN HYPERGRAVITY ENVIRONMENT

Provided is a material performance testing system under a fixed multi-field coupling effect in a hypergravity environment, including a hoisted sealed cabin, a bearing frame, a high-temperature furnace, a mechanical test device, and a buffer device. The bearing frame and the high-temperature furnace are fixedly mounted inside the hoisted sealed cabin. The bearing frame is covered on the high-temperature furnace. The buffer device is mounted at a bottom of the high-temperature furnace. Upper and lower ends of the mechanical test device are connected in a top of the bearing frame and the bottom of the high-temperature furnace. A sample is connected and mounted at an end of the mechanical test device. 1. A material performance testing system under a fixed multi-field coupling effect in a hypergravity environment , comprising a hoisted sealed cabin , a bearing frame , a high-temperature furnace , a mechanical test device , and a buffer device; the bearing frame and the high-temperature furnace are fixedly mounted on an inside of the hoisted sealed cabin , the bearing frame is covered on the high-temperature furnace , the buffer device is mounted at a bottom in the high-temperature furnace , an upper end and a lower end of the mechanical test device are connected in a top of the bearing frame and a bottom of the high-temperature furnace , and a sample is connected and mounted to an end of the mechanical test device;the high-temperature furnace is fixed in a hypergravity test cabin, the high-temperature furnace comprises an upper furnace, a middle furnace, a lower furnace, and a heat insulation layer, a high-strength furnace tube, a heating, and a furnace carrier arranged in order from top to bottom, the upper furnace is composed of an upper heat insulation cover, an upper cavity outer casing, an upper cavity middle casing, an upper cavity heat insulation layer, and an upper cavity lower fixing cover, the upper cavity outer casing, the upper cavity middle casing, and the ...

EQUIVALENT ACCELERATION METHOD OF CREEP LOADS BASED ON CONSISTENT FAILURE MODE

Disclosed is an equivalent acceleration method of creep loads based on a consistent failure mode. The equivalent acceleration method includes obtaining corresponding tensile strengths; obtaining corresponding creep rupture time; establishing rupture time law, minimum creep rate law and rupture strain law; calculating the value of parameter p in creep damage accumulation model; and dividing the failure mode consistency interval of creep load under variable temperature and variable load. The damage caused by the creep load in the failure mode consistency interval is calculated by using the multi-grade variable temperature and variable load creep nonlinear damage accumulation model, the damage is accelerated to the maximum creep load state in the failure mode consistency interval according to the principle of damage equivalence, and finally the equivalent acceleration of creep load is realized. 1. An equivalent acceleration method of creep loads based on a consistent failure mode , comprising:{'sub': bi', 'i, 'S1, obtaining corresponding tensile strengths σat different temperatures Tthrough high-temperature tensile tests of materials, wherein i=1, 2, 3 . . . , n;'}{'sub': f', 'f', 'm', 'i', 'i, 'sup': '●', 'S2, obtaining corresponding creep rupture time t, rupture strain εand a minimum creep rate ε at different stress temperatures (σ,T) through a high temperature creep test of materials;'}{'sub': i', 'i, 'S3, establishing a rupture time law, a minimum creep rate law and a rupture strain law, and then obtaining a creep damage tolerance factor under a corresponding stress-temperature (σ,T) combination;'}{'sub': i', 'i', 'i, 'S4, obtaining a creep duration tof each grade of stress-temperature (σ,T) combination through a creep test of materials under variable temperatures and variable loads;'}{'sub': bi', 'fi', 'i', 'i', 'i, 'S5, calculating a value of parameter p in a creep damage accumulation model by combining the tensile strengths σat all grades of temperature obtained ...

OUTER LOOP TORQUE CONTROL

The present disclosure relates to a materials testing device wherein an algorithmic approach is used to implement outer loop control software algorithm for control of a plurality of motors imparting different forces on a materials testing specimen. In particular, a torsion motor is controlled by an outer loop control software to control the rotational force applied to the materials testing sample. 1. A materials testing device including:a first grip and a second grip, for holding a materials testing sample therehetween;a first driver for imparting a first force through at least one of said first and second grips;a second driver for imparting a second force through at least one of the first and second grips; anda feedback system for controlling the second driver.2. The materials testing device of wherein the first grip is a lower grip and the second grip is an upper grip positioned over the first grip.3. The materials testing device of wherein the first force is orthogonal to the second force.4. The materials testing device of wherein the first driver imparts an axial force on the materials testing sample.5. The materials testing device of wherein the second driver imparts a rotational force on the materials testing sample.6. The materials testing device of wherein the lower grip is attached to a load cell to measure axial and rotational stress on the sample.7. The materials testing device of further including a rail along which the second grip is driven by the first driver claim 6 , the displacement of the second grip being measured to calculate axial strain on the materials testing sample.8. The materials testing device of wherein the second driver includes an incremental encoder to measure rotational strain on the materials testing sample.9. The materials testing device of wherein the feedback system uses a current torque rate and a current rotation rate to calculate rotational forces required to maintain a zero torque rate on the materials testing sample.10. The ...