An apparatus for material testing of a specimen. The apparatus-includes a specimen holder for holding a specimen to be tested, a rod arrangement for moving in direction to the specimen holder for transmitting a mechanical load to the specimen, an actuator for moving at least one of the rod arrangement and the specimen holder with respect to each other along a horizontal impact direction, and a supporting base, onto which the specimen holder, the rod arrangement and the actuator are mounted. A specimen holder arrangement is detachably coupled to a holder accommodation section of the supporting base.

An apparatus for material testing of a specimen, in particular a battery device. The apparatus includes a specimen holder arrangement with a specimen holder for holding a specimen to be tested, a rod arrangement for moving in direction to the specimen holder for transmitting a mechanical load to the specimen, and an electromechanical actuator for moving at least one of the rod arrangement and the specimen holder arrangement with respect to each other along a longitudinal impact direction. The electromechanical actuator arrangement is configured to adjust the speed to any speed between 0 m/s to 12 m/s between the rod arrangement and the specimen holder arrangement other for transmitting a mechanical load to the specimen.

A pneumatic-electromagnetic-driven impact device for nondestructive detection of fruit texture. The bellow support member is connected to a connection plate and a bellow. A pneumatic connector is mounted on the bellow support member. A support spring is connected to the bellow support member, while the support spring is fixedly connected to the impactor housing cover. The impactor housing is connected to the impactor housing cover and the bellow. An insulating sleeve is installed inside the impactor housing, forming a hollow region between the sleeve and the housing for placing the electromagnetic coils. An iron core is arranged inside the insulating sleeve, and a sliding rod is movably connected inside the iron core. Two annular magnets are connected 10 to the sliding rod via a magnetic ring base. A sensor is embedded in a sensor base, and a flexible impact head is fixedly connected to the bottom of the sensor base.

A pneumatic-electromagnetic-driven impact device for nondestructive detection of fruit texture. The bellow support member is connected to a connection plate and a bellow. A pneumatic connector is mounted on the bellow support member. A support spring is connected to the bellow support member, while the support spring is fixedly connected to the impactor housing cover. The impactor housing is connected to the impactor housing cover and the bellow. An insulating sleeve is installed inside the impactor housing, forming a hollow region between the sleeve and the housing for placing the electromagnetic coils. An iron core is arranged inside the insulating sleeve, and a sliding rod is movably connected inside the iron core. Two annular magnets are connected 10 to the sliding rod via a magnetic ring base. A sensor is embedded in a sensor base, and a flexible impact head is fixedly connected to the bottom of the sensor base.

An optical detector determines a relative depth between a first position and a second position on an inclined surface. A controller determines a slope of the inclined surface based on the relative depth between the first position and the second position and the distance moved between positions. An actuator displaces a punch at a plurality of intermediate positions on the inclined surface located between the first position and the second position. A displacement detector determines a depth at which the sample is touched by the punch at each of the plurality of intermediate positions. The controller further determines a calculated depth of the inclined surface at each of the plurality of intermediate positions based on the slope of the inclined surface and the distance moved between positions. The controller further compares the depth measured by the displacement detector to each corresponding calculated depth to verify accuracy of the displacement detector.

An optical detector determines a relative depth between a first position and a second position on an inclined surface. A controller determines a slope of the inclined surface based on the relative depth between the first position and the second position and the distance moved between positions. An actuator displaces a punch at a plurality of intermediate positions on the inclined surface located between the first position and the second position. A displacement detector determines a depth at which the sample is touched by the punch at each of the plurality of intermediate positions. The controller further determines a calculated depth of the inclined surface at each of the plurality of intermediate positions based on the slope of the inclined surface and the distance moved between positions. The controller further compares the depth measured by the displacement detector to each corresponding calculated depth to verify accuracy of the displacement detector.

The invention provides a test method for quantitatively studying a stress wave propagation law of a porous rock, which adopts a dynamic true triaxial electromagnetic Hopkinson bar test system for testing. The test method comprises: quantitatively designing and preparing a cubic porous rock sample required by testing; placing the cubic pore rock sample in a central cubic square chest; and quantitatively studying a high-amplitude stress wave propagation law of the porous rock on the cubic porous rock sample by adopting the dynamic true triaxial electromagnetic Hopkinson bar test system.

The invention provides a test method for quantitatively studying a stress wave propagation law of a porous rock, which adopts a dynamic true triaxial electromagnetic Hopkinson bar test system for testing. The test method comprises: quantitatively designing and preparing a cubic porous rock sample required by testing; placing the cubic pore rock sample in a central cubic square chest; and quantitatively studying a high-amplitude stress wave propagation law of the porous rock on the cubic porous rock sample by adopting the dynamic true triaxial electromagnetic Hopkinson bar test system.

Example embodiments disclose a submersible impact test hammer comprising a resilient tip, an output shaft, an end closure, a pressure housing, a sealing bearing that supports the output shaft to the end closure, a slug, solenoid coils, slug shaft bolts, linear bearings that slidably mount the slug to the slug shaft bolts, and a spring between the slug and the output shaft. The pressure housing may be attached to the end closure such that the two enclose a watertight volume, and the sealing bearing may allow relative movement while preventing leakage into the watertight volume. The current through the solenoid coils may create an attractive magnetic force between the slug and the end closure accelerating the slug toward the end closure, and the impact of the slug against the output shaft may create a force pulse which is transmitted to the resilient tip and then to a test object.