Dynamic friction experimental device and method for testing dynamic mechanical property of material

A dynamic friction experimental device, comprising:

• a base, wherein the base is provided with a displacement-constrain structure, and the displacement-constrain structure is abutted against a first end face of a specimen when a dynamic mechanical property of the specimen is tested;
• an incident bar, wherein the incident bar and the displacement-constrain structure are positioned on a same side of the base, and the incident bar comprises at least two sections, wherein the at least two sections are coaxially arranged, a first incident section of the at least two sections is arranged adjacent to the displacement-constrain structure, and a second incident section of the at least two sections is connected to the first incident section;
• at a joint of the first incident section and the second incident section, a cross-sectional area of the first incident section is less than a cross-sectional area of the second incident section, and a projection of a cross section of the first incident section is positioned in a cross section of the second incident section along an axial direction of the second incident section;
• when the dynamic mechanical property of the specimen is tested, an end of the first incident section is abutted against a second end face of the specimen, wherein the end of the first incident section faces the displacement-constrain structure;
• an axial compression device, wherein the axial compression device is connected to an end of the second incident section, wherein the end of the second incident section is far away from the first incident section, and the axial compression device is configured to apply pressure to the second incident section;
• a torque loading device, wherein the torque loading device is connected to the second incident section, and the torque loading device is configured to apply torque to the second incident section;
• an energy storage bar, wherein a first end of the energy storage bar is fixedly connected to an end of the incident bar, wherein the end of the incident bar is far away from the specimen, and a second end of the energy storage bar is abutted against and rotatably connected to the axial compression device;
• and
• a clamping device, wherein the clamping device is fixedly arranged on the base and is positioned between the torque loading device and the incident bar, and the energy storage bar penetrates through the clamping device;
• the energy storage bar is clamped by the clamping device, so that the energy storage bar is configured to stores the torque applied by the torque loading device;
• and when torque loading reaches a torque set value, a clamping of the clamping device is unlocked to release the torque stored in the energy storage bar.