Abstract: A test fixture for securing a test article is disclosed. The test fixture includes a frame, an upper grip, at least one heat shield, a cooling assembly, and insulation. The frame defines an upper portion and a lower portion. The lower portion of the frame is releasably mounted to a vibration device. The upper grip is connected to the upper portion of the frame and the lower grip is connected to the lower portion of the frame. The heat shield is positioned to insulate at least one of the upper grip and the lower grip. The upper grip is configured to secure an upper portion of the test article along an upper interface. The lower grip is configured to secure a lower portion of the test article along a lower interface. The cooling assembly transports a cooling medium across at least one of the upper interface and the lower interface.

Abstract: A bearing system for rock mechanics test under high temperature and high pressure multi-field coupling includes a force sensor lifting seat and a jack. The force sensor lifting seat includes a connecting disk connected with the jack, a support disk, and an operation channel. A groove dented downwards is arranged on the connecting disk, the support disk is disposed in the groove and freely propped upon the connecting disk; through holes of the connecting disk and the support disk form a control operation channel; and a limiting device is arranged for preventing an MTS triaxial force sensor from disengaging from the support disk. A bolt hole of the force sensor can be aligned with a mounting hole on a solid steel column by rotating the connecting disk for convenient and accurate bolting.

Abstract: A testing machine for testing a test specimen includes an actuator assembly configured to be coupled to the test specimen; and a computing device configured to control the actuator assembly, the computing device including a graphical user interface that renders at least a visual representation or a simulated visual representation of at least a parameter of the component or the component changing in accordance with changes of the actual corresponding component on the testing machine.

Abstract: A device (100) of characterization of the elastic properties of a friction material, comprising: —a support yoke (1) having a body (2) with a monoblock structure surrounding an inner chamber (3); —said inner chamber (3) being defined superiorly by a first monoblock body portion (2) or upper crossbar (4); —said inner chamber (3) being defined inferiorly by a second monoblock body portion (2) or lower crossbar (5); —said upper (4) and lower (5) crossbars being mutually connected by two side columns (6, 7) formed by a third and a fourth monoblock body portions (2); —said monoblock body comprising at least one access opening (8) to the inner chamber (3); —said upper crossbar comprising a threaded through hole (9) defining a device axis (X-X) arranged substantially orthogonal to said upper crossbar (4) and said lower crossbar (5) fully passing through the inner chamber (3); —said support yoke <(1) houses, substantially completely in said inner chamber (3), a measuring column (10); said measuring column (10) com

Abstract: A method of bending a long member includes applying a tensile force to the long member to draw out the long member in a lengthwise direction thereof, measuring a displacement of the long member after commencement of the application of the initial tensile force, and bending the long member by applying a correction tensile force and a bending pressure for bending the long member into a curved shape in the lengthwise direction simultaneously to the long member upon the displacement exceeding a predetermined tensile fracture threshold value within a predetermined period of time or after a lapse of the predetermined period of time without the displacement exceeding the tensile fracture threshold value. The correction tensile force is smaller than the tensile force at the time the displacement exceeds the tensile fracture threshold value or the tensile force at the lapse of the predetermined period of time.

Abstract: A method for evaluating thermal fatigue resistance for a welding consumable alloy can include the following steps: placing a test specimen of a welding consumable alloy in a testing device such that a tensile load and a compressive load can be introduced to the test specimen; heating the test specimen to a first temperature; applying a compressive force to the test specimen while heating the test specimen; cooling the test specimen to a second temperature; and applying a tensile force to the test specimen while cooling the test specimen.

Abstract: A load increasing in a stepped manner from an initial load is applied to a test piece (4) of material in order to examine mechanical properties of the material by applied load, but the load having a next step load added thereto is applied to the test piece after it is confirmed that the variation of strain within a unit time applied to the test piece in the load (Wn) applied in each step falls within a predetermined value whereby there are measured physical variation and time variation in the load applied in each step. The load applied to the test piece is preferably kept at a constant value and the applied load (Wn) and and time variation are preferably recorded.

Abstract: A test machine (10, 40, 60) for inducing high-cycle fatigue (at kilohertz vibration rates) in a specimen of a material under test. Each test machine (10, 40, 60) provides both dynamic and static loading. One embodiment is an SEM-compatible machine (10), having an inner frame (11) containing symmetrical components on either side of a stationary node. The specimen is placed at this stationary vibration node. Dynamic loading is the result of vibrations provided by two piezoelectric actuators (16) inside the frame (11), one on each side of the node. Static loading is provided by means of two stress rods (12), each extending from an end plate (11a) into the frame (11). A pair of cylindrical couplers (14) is also inside the frame, one coupler (14) on each side of the node. Each coupler (14) is attached to an associated piezoelectric actuator (16) and stress rod (12) such that the static and dynamic loads are transferred to the couplers (14).

Abstract: A mechanical impact test is performed using an incremental mechanical loading apparatus having a loading head movable in a first direction and in a second direction opposite to the first direction, and a stationary cross piece. A starter specimen is mounted between the loading head and the stationary cross piece, such that the starter specimen extends in the first direction from the loading head and the movement of the loading head in the second direction applies a tensile load to the starter specimen. A test specimen is mounted to the loading head such that a mechanical reaction force generated by the breaking of the starter specimen is imparted from the starter specimen to the test specimen. To perform the test, the loading head of the incremental mechanical loading apparatus is moved in the second direction such that the starter specimen is loaded to failure, with the result that the failure of the starter specimen causes the application of an impact force to the test specimen.

Abstract: A method and apparatus for applying a force, displacement, or both to specimens, components, or systems by using a remote variable load/deflection device. The method enables testing of materials under actual in-service conditions. A displaceable container with a heating or heating and cooling element inside is provided. As heat is applied to the element, it expands thermally and causes the container to displace and apply force to specimens, components, or systems. The load/displacement of the container is modified by heating or cooling the element material. The container may be attached to in-service specimens, components, or systems and used to study the material behavior during in-service operation.

Abstract: A device for the determination of residual stress in a material sample consisting of a sensor coil, adjacent the material sample, whose resistance varies according to the amount of stress within the material sample, a mechanical push-pull machine for imparting a gradually increasing compressional and tensional force on the material sample, and an impedance gain/phase analyzer and PC for sending an input signal to and receiving an input signal from the sensor coil. The PC will measure and record the change in resistance of the sensor coil and the corresponding amount of strain of the sample. The PC will then determine from the measurements of change of resistance and corresponding strain of the sample the point at which the resistance of the sensor coil is at a minimum and the corresponding value and type of strain of the sample at that minimum resistance point thereby enabling a calculation of the residual stress in the sample.

Abstract: The device includes a base plate with a recessed seating for the shoulder of a tube with a threaded neck and a compressing mechanism engaging the open end of the tube body, the compressing mechanism being mounted axially with respect to the tube. The compressing mechanism is a reciprocable rod (20) which, on the end thereof facing the base plate (26), has a clamping head (30) for clamping the open end of the tube body. In a conical recess in the base plate (26), there is provided an internally threaded bore for screwing in the threaded neck of the tube (1).