首页|Effect of the interval between two shocks on ejecta formation from the grooved aluminum surface

Effect of the interval between two shocks on ejecta formation from the grooved aluminum surface

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This work focuses on the effect of the interval between two shocks on the ejecta formation from the grooved aluminum(Al1100)surface by using smoothed particle hydrodynamics numerical simulation.Two unsupported shocks are obtained by the plate-impact between sample and two flyers at interval,with a peak pressure of approximately 30 GPa for each shock.When the shock interval varies from 2.11 to 7.67 times the groove depth,the bubble velocity reduces to a constant,and the micro jetting factor Rj from spike to bubble exhibits a non-monotonic change that decreases initially and then increases.At a shock interval of 3.6 times the groove depth,micro jetting factor RJ from spike to bubble reaches its minimum value of approximately 0.6.While,the micro jetting factor RF from spike to free surface de-creases linearly at first,and stabilizes around 0.25 once the shock interval surpasses 4.18 times the groove depth.When the shock interval is less than 4.18 times the groove depth,the unloading wave generated by the breakout of the first shock wave is superimpose with the unloading part of the second shock wave to form a large tensile area.

EjectaMicrojetTwo shocksIntervalSmoothed particle hydrodynamics

Mingyang Xu、Jianli Shao、Weidong Song、Enling Tang

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School of Equipment Engineering,Shenyang Ligong University,Shenyang 110159,China

State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China

the Doctoral Research Launch Foundation of Liaoning Province,Chinathe Science Challenge Projectthe National Natural Science Foundation of Chinathe key Laboratory of Computational PhysicsShenyang Ligong University Talent Introduction Support Fund,China

2022-BS-185TZ201600111972092;12172056;12002049HX02021-24720-24

2024

10.1016/j.dt.2023.07.021

防务技术
中国兵工学会

防务技术

CSTPCD
影响因子：0.358
ISSN：2214-9147
年,卷(期)：2024.33(3)
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