Uniaxial bidirectional synchronous control electromagnetic loaded dynamic shear test system and method

A uniaxial bidirectional synchronous control electromagnetic loaded dynamic shear test system,

• comprising a support platform, a left electromagnetic pulse generator, a left electromagnetic pulse generator support, a left stress wave loading bar, a stress wave loading bar support, a right electromagnetic pulse generator, a right electromagnetic pulse generator support, a right stress wave loading bar, a bottom plate, a top plate, a support post, a hydraulic pressure loading apparatus, an actuator, a base, a test specimen, and strain gauges, wherein
• a test apparatus centers on the test specimen and is arranged on left and right sides of the test specimen;
• a left dynamic shear loading apparatus comprises a left electromagnetic pulse generator, a left electromagnetic pulse generator support, a left stress wave loading bar, and a stress wave loading bar support, wherein the left electromagnetic pulse generator is placed on the left electromagnetic pulse generator support;
• the left electromagnetic pulse generator and the left electromagnetic pulse generator support can axially move on the support platform along an axis of the loading bar, and can be fixed at a position satisfying a test requirement;
• the left stress wave loading bar is horizontally placed in a fastening groove of the stress wave loading bar support, and can freely slide left and right in the support fastening groove;
• an incident end of the left stress wave loading bar freely contacts a right stress wave output end surface of the left electromagnetic pulse generator, so as to transmit a stress wave to the left stress wave loading bar;
• then, the stress wave propagates towards the test specimen in the axial direction of the bar, and applies a dynamic shear load to the test specimen from left to right;
• a right dynamic shear loading apparatus comprises a right electromagnetic pulse generator, a right electromagnetic pulse generator support, a right stress wave loading bar, and a stress wave loading bar support, wherein the right electromagnetic pulse generator is placed on the right electromagnetic pulse generator support;
• the right electromagnetic pulse generator and the right electromagnetic pulse generator support can axially move on the support platform along an axis of the loading bar, and can be fixed at a position satisfying a test requirement;
• the right stress wave loading bar is horizontally placed in a fastening groove of the stress wave loading bar support, and can freely slide left and right in the support fastening groove;
• an incident end of the right stress wave loading bar freely contacts a left stress wave output end surface of the right electromagnetic pulse generator, so as to transmit a stress wave to the right stress wave loading bar;
• then, the stress wave propagates towards the test specimen in the axial direction of the bar, and applies a dynamic shear load to the test specimen from right to left;
• a servo-controlled normal pressure loading system comprises a bottom plate, a top plate, a support post, a hydraulic pressure loading apparatus, an actuator, and a base, wherein the bottom plate and the top plate are connected by means of the support post to form a loading frame system of a servo-controlled normal pressure loading apparatus;
• the hydraulic pressure loading apparatus is fixed on the top plate;
• the actuator is connected to the hydraulic pressure loading apparatus, and is used to transfer an oil pressure provided by the hydraulic pressure loading apparatus to an upper surface of the test specimen;
• the base is located on the bottom plate, and is used to place the test specimen;
• the base and the actuator together form an action-and-reaction structure, and apply a static normal pressure to a lower surface and the upper surface of the test specimen, respectively;
• and
• the strain gauges are adhered in the centers of upper surfaces and lower surfaces of the left stress wave loading bar and the right stress wave loading bar, respectively.