Ejecta from periodic grooved Sn surface under unsupported shocks

doi:10.1088/1674-1056/27/1/016202

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

Ejecta from periodic grooved Sn surface under unsupported shocks

Wen-Bin Liu(刘文斌), Dong-Jun Ma(马东军), An-Min He(何安民), Pei Wang(王裴)

1 Institute of Applied Physics and Computational Mathematics, Beijing 100094, China;
2 Graduate School of China Academy of Engineering Physics, Beijing 100088, China

收稿日期:2017-06-18 修回日期:2017-08-25 出版日期:2018-01-05 发布日期:2018-01-05
通讯作者: Pei Wang E-mail:wangpei@iapcm.ac.cn
基金资助:
Project supported by the Joint Fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics (Grant No. U1530261), the National Natural Science Foundation of China (Grant Nos. 11402032 and 11502030), and the Science Challenge Project, China (Grant No. TZ2016001).

Ejecta from periodic grooved Sn surface under unsupported shocks

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

1 Institute of Applied Physics and Computational Mathematics, Beijing 100094, China;
2 Graduate School of China Academy of Engineering Physics, Beijing 100088, China

Received:2017-06-18 Revised:2017-08-25 Online:2018-01-05 Published:2018-01-05
Contact: Pei Wang E-mail:wangpei@iapcm.ac.cn
Supported by:
Project supported by the Joint Fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics (Grant No. U1530261), the National Natural Science Foundation of China (Grant Nos. 11402032 and 11502030), and the Science Challenge Project, China (Grant No. TZ2016001).

摘要/Abstract

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.

关键词: ejecta, grooved Sn surface, "Eiffel Tower" structure, unsupported shock

Abstract: 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.

Key words: ejecta, grooved Sn surface, "Eiffel Tower" structure, unsupported shock

中图分类号: (Structural failure of materials)

62.20.M-

62.50.Ef (Shock wave effects in solids and liquids) 47.20.Ma (Interfacial instabilities (e.g., Rayleigh-Taylor))

刘文斌, 马东军, 何安民, 王裴. Ejecta from periodic grooved Sn surface under unsupported shocks[J]. 中国物理B, 2018, 27(1): 16202-016202.

Wen-Bin Liu(刘文斌), Dong-Jun Ma(马东军), An-Min He(何安民), Pei Wang(王裴). Ejecta from periodic grooved Sn surface under unsupported shocks[J]. Chin. Phys. B, 2018, 27(1): 16202-016202.

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Ejecta from periodic grooved Sn surface under unsupported shocks

Ejecta from periodic grooved Sn surface under unsupported shocks

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