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Published on: August 7, 2018
Theoretical and experimental study of the "superelastic collision effects" used to excite high-g shock environment
Zhengyong Duan1, Qihang Zeng2, Dayong Tang3
1Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan District, Chongqing, 402160, China. zqh@my.swjtu.edu.cn.
Abstract:
The excitation technology for high-g-level shock environment experiments is currently a topic of interest, for which velocity amplification by collisions of vertically stacked bodies has been used to develop high-g shock tests with great success. This study investigated the superelastic collision effects generated during high-velocity one-dimensional three-body impacts. Theoretical formulae were derived in brief for an analytical investigation of the collisions. Four experiments were performed with different initial velocities obtained from free-falls from different heights. Velocity gains larger than 5 were obtained for the three-body collisions, and coefficients of restitution larger than 2.5 were observed for the second impact. The experimental results well verified the existence of superelastic collision effects in the one-dimensional three-body impacts.
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