Shenzhen University

Weiyue Bao

Tao Zhou

Jianbo Zhu

Shiwei Zhang

Junyan Li

Zhuo Cen

Chengcheng Xie

Heping Xie

Linsheng Liang

Yao Wang

Provided is a fixture applied to sticking a strain gauge on a Hopkinson square bar and a use method of the fixture. The invention is specially designed for a square waveguide bar, and the fixture further ensures consistency of the same group of strain gauges along a cross-section position of the bar. The fixture has important practical value in application in a dynamic true triaxial electromagnetic Hopkinson bar test, especially in a high-end material testing field requiring high-precision and high-reliability test data.

Fixture applied to sticking strain gauge on Hopkinson square bar and use method thereof

Provided are an energy absorbing and buffering device applied to a dynamic true triaxial electromagnetic Hopkinson bar and a testing and using method thereof. The device comprises an energy absorbing and buffering ring, an exhaust pipe and an inert gas storage bin. According to the testing and using method, the energy absorbing and buffering device is utilized and connected with a waveguide bar through a middle hollow structure; and a rear end of the energy absorbing and buffering ring is tightly attached to a baffle at a confining pressure loading end. The energy absorbing and buffering device provides energy absorbing and buffering for the waveguide bar, which prolongs a service life of the waveguide bar under an impact load.

Energy absorbing and buffering device applied to dynamic true triaxial electromagnetic Hopkinson bar and method

Provided is a dynamic true triaxial electromagnetic Hopkinson bar leveling and centering system and method. The system comprises a supporting base, a micrometer adjusting knob, a sliding platform, an auxiliary supporting plate, a fixing groove, at least two auxiliary centering targets and a lamp source. According to the auxiliary centering system, a principle that light rays are straight lines and two points form one line is adopted, and adjacent perpendicularity and coaxial centering leveling of a bar piece are determined by respectively adjusting a center of a loading end surface of the bar piece and an upper surface of the bar piece.

Dynamic true triaxial electromagnetic Hopkinson bar leveling and centering system and method

Provided is a stress blank angle eliminating device and method for a dynamic true triaxial electromagnetic Hopkinson bar. Objectives of eliminating influence of a stress blank angle in a sample in a test and preventing permanent deformation caused by mutual collision between the Hopkinson bars are achieved. The adjustable test device for eliminating the stress blank angle eliminates influence of the stress blank angle generated by the sample in a triaxial six-direction dynamic impact test process, and is convenient for obtaining real dynamic failure parameters of the sample.

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Weiyue Bao