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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 |
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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.
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Received: 18 June 2017
Revised: 25 August 2017
Accepted manuscript online:
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PACS:
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62.20.M-
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(Structural failure of materials)
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62.50.Ef
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(Shock wave effects in solids and liquids)
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47.20.Ma
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(Interfacial instabilities (e.g., Rayleigh-Taylor))
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| Fund: 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). |
Corresponding Authors:
Pei Wang
E-mail: wangpei@iapcm.ac.cn
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Cite this article:
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 2018 Chin. Phys. B 27 016202
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