A numerical study of the instability of the metal shell in the implosion

Hao Pengcheng; Feng Qijing; Hu Xiaomian

doi:10.11883/1001-1455(2016)06-0739-06

Volume 36 Issue 6

Oct. 2018

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Hao Pengcheng, Feng Qijing, Hu Xiaomian. A numerical study of the instability of the metal shell in the implosion[J]. Explosion And Shock Waves, 2016, 36(6): 739-744. doi: 10.11883/1001-1455(2016)06-0739-06

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Hao Pengcheng, Feng Qijing, Hu Xiaomian. A numerical study of the instability of the metal shell in the implosion[J]. Explosion And Shock Waves, 2016, 36(6): 739-744. doi: 10.11883/1001-1455(2016)06-0739-06

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A numerical study of the instability of the metal shell in the implosion

doi: 10.11883/1001-1455(2016)06-0739-06

1.
Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
2.
National Key Laboratory of Computational Physics, Institute of Applied Physics andComputational Mathematics, Beijing 100088, China
3.
Graduate School, China Academy of Engineering Physics, Beijing 100088, China

Received Date: 2015-04-30
Rev Recd Date: 2015-08-17
Publish Date: 2016-11-25

Abstract

Abstract

In this work the instability of the metal shell in the cylindrical implosion was studied numerically using a multi-component elastic-plastic hydrodynamic Eulerian code. Agreeing with those of the experiments, the numerical results show that the material strength restrains the growth of the interfacial perturbation with an effect not to be overlooked. The material yield strength has an obvious restraining effect on the higher mode of perturbation, while that of the shear module is similar but less sensitive. There exists a most instable mode number, which decreases as the yield strength increases and is approximately linear with the logarithm of the yield strength, and the perturbation grows faster as the shell grows thinner.
- fluid mechanics,
- interfacial instability,
- elastic-plastic simulation,
- implosion,
- material parameters

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References(15)

References

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