中国物理B ›› 2018, Vol. 27 ›› Issue (1): 16202-016202.doi: 10.1088/1674-1056/27/1/016202
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
Wen-Bin Liu(刘文斌), Dong-Jun Ma(马东军), An-Min He(何安民), Pei Wang(王裴)
Wen-Bin Liu(刘文斌)1,2, Dong-Jun Ma(马东军)1, An-Min He(何安民)1, Pei Wang(王裴)1
摘要: Dynamic failure and ejection characteristics of a periodic grooved Sn surface under unsupported shock loading are studied using a smoothed particle hydrodynamics method. An “ Tower” spatial structure is observed, which is composed of high-speed jet tip, high-density jet slug, longitudinal tensile sparse zone, and complex broken zone between grooves. It is very different from the spike-bubble structure under supported shocks, and has been validated by detonation loading experiments. In comparison with that under supported shocks at the same peak pressure, the high-speed ejecta decreases obviously, whereas the truncated location of ejecta moves towards the interior of the sample and the total mass of ejecta increases due to the vast existence of low-speed broken materials. The shock wave profile determines mainly the total ejection amount, while the variation of V-groove angle will significantly alter the distribution of middle-and high-speed ejecta, and the maximum ejecta velocity has a linear correlation with the groove angle.
中图分类号: (Structural failure of materials)