A rotary shock-testing machine including: a base; a first shaft rotatable relative to the base, the first shaft being driven to rotate; a first wheel rotatable with the first shaft; a second shaft rotatable relative to the base; a second wheel rotatable with a first portion of the second shaft; and a test disc for holding one or more specimens to be tested, the test disc being rotatable with a second portion of the second shaft; wherein the first and second wheels are aligned with each other such that the second wheel is driven by the first wheel when a material is introduced into a gap between a surface of the first wheel and a corresponding surface of the second wheel.

A method and apparatus for measuring a dynamic tensile stress and/or tensile strain response of a material such as an elastic material and/or a ductile material. The apparatus may include a striker bar, a stretcher bar, and a drive assembly configured to propel the striker bar toward the stretcher bar. The apparatus may further include a stationary specimen mount and a movable specimen mount that receive a test sample. The striker bar and the stretcher bar of the apparatus may provide a continuous stress on the test sample and an accurate tensile stress/strain measurement.

An impact device for imparting an impulse impact to a work piece during an impact excitation measurement, includes an elongated elastic bendable arm which is elastically deformable around a bending direction, and has a proximal longitudinal end and a distal longitudinal end; a hammer tip for mechanically providing an impact to the work piece, and attached to the distal end of the arm; and a programmable actuator attached to the proximal longitudinal end of the arm. The actuator is programmed to provide an angular velocity to the proximal longitudinal end of the arm by rotating the proximal longitudinal end around an actuator axis, which is essentially parallel to the bending direction of the arm, the angular velocity following a predefined angular velocity profile. The angular velocity profile is configured to provide an impulse impact to the work piece.

An apparatus for measuring for measuring coefficient of restitution which is capable of reducing a mass effect and performing tests in free directions, is disclosed. The apparatus for measuring coefficient of restitution includes a holder for holding a spherical indenter, an ejection mechanism configured to eject the indenter held by the holder from the holder to a specimen, a speed measuring unit configured to measure an impact speed that is a speed of the indenter before the indenter impacts against the specimen, and a rebound speed that is a speed of the indenter after the indenter is rebounded from the specimen; and an arithmetic unit configured to calculate a coefficient of restitution that is a ratio of the rebound speed to the impact speed.

A single-pulse experimentation device based on a Hopkinson pressure bar and an experimentation method include an experimentation assembly and a pulse controlling assembly, the experimentation assembly includes a power generating mechanism, an incident bar and a transmission bar, a space between the incident bar and the transmission bar is for accommodating a sample, and the sample is for bearing and transferring a dynamic-loading compressional wave transmitted by the incident bar; the pulse controlling assembly includes: a stretching assembly that is internally hollow and is connected to the transmission bar; and an elastic assembly and a gear regulating mechanism that are located inside the stretching assembly, and are connected to corresponding positions of the stretching assembly, respectively; wherein the gear regulating mechanism is configured for driving the stretching assembly to switch between a first position state and a second position state.

This application relates to a test device applied to a coupled environment of stress, wear, and corrosion, and a quantitative evaluation method, and belongs to the field of failure analysis of materials. The test device includes a stress-loading mechanism configured to load a stress on a sample, a corrosion mechanism configured to conduct an electrochemical corrosion test on the sample, and a wear mechanism configured to wear a sample. The test device applied to a coupled environment of stress, wear, and corrosion of this application can establish a wear-stress-corrosion coupled action test process, and can investigate service behaviors of various metallic materials and metal matrix composites under conditions close to actual service conditions to obtain key behavior data under a multi-factor coupled action, quantitatively analyze a wear, a corrosion, a wear-corrosion interaction, a stress-wear interaction.

This application relates to a test device applied to a coupled environment of stress, wear, and corrosion, and a quantitative evaluation method, and belongs to the field of failure analysis of materials. The test device includes a stress-loading mechanism configured to load a stress on a sample, a corrosion mechanism configured to conduct an electrochemical corrosion test on the sample, and a wear mechanism configured to wear a sample. The test device applied to a coupled environment of stress, wear, and corrosion of this application can establish a wear-stress-corrosion coupled action test process, and can investigate service behaviors of various metallic materials and metal matrix composites under conditions close to actual service conditions to obtain key behavior data under a multi-factor coupled action, quantitatively analyze a wear, a corrosion, a wear-corrosion interaction, a stress-wear interaction.

A multi-axial spine testing system includes a physiological motion unit (PMU); a uni-axial test frame having an input; and a fixture configured to be attached to the test frame and facilitates a plurality of primary motions of one or more of the PMU and the fixture. The plurality of primary motions includes a linear motion of the input and a rotational movement of an output. The fixture has an upper assembly directly or indirectly coupled to the input. The upper assembly transfers the linear motion (T.sub.z) of the actuator to the rotational movement (R.sub.x) of the output. The upper assembly and lower assembly apply a bending moment (M.sub.X) and an axial compression (F.sub.z) to the PMU. An external transducer collects data related to or generated by at least the plurality of primary motions. The fixture simultaneously provides the bending motion and axial compression to the PMU.

A wire bond pull test apparatus for detecting a bond failure or wire breakage during a vertical tensile strength testing of a bonded wire under test. The test apparatus has a clamp structure with clamping elements and a controllable actuator coupled to at least one the clamping elements and configured to drive the movement of the clamping elements relative to each other to clamp the wire under test.