Simulation of hypervelocity impact by the material point method coupled with a new equation of state

LI Yixiao; WANG Shengjie

doi:10.11883/bzycj-2018-0261

Volume 39 Issue 10

Oct. 2019

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LI Yixiao, WANG Shengjie. Simulation of hypervelocity impact by the material point method coupled with a new equation of state[J]. Explosion And Shock Waves, 2019, 39(10): 104201. doi: 10.11883/bzycj-2018-0261

Citation:

LI Yixiao, WANG Shengjie. Simulation of hypervelocity impact by the material point method coupled with a new equation of state[J]. Explosion And Shock Waves, 2019, 39(10): 104201. doi: 10.11883/bzycj-2018-0261

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Simulation of hypervelocity impact by the material point method coupled with a new equation of state

doi: 10.11883/bzycj-2018-0261

LI Yixiao^{1, 2
,},
WANG Shengjie²

1.
Graduate School, Second Academy, China Aerospace Science and Industry Corporation, Beijing 100854, China
2.
Beijing Institute of Mechanical Equipment, Beijing 100854, China

Received Date: 2018-07-16
Rev Recd Date: 2018-10-17
Publish Date: 2019-10-01

Abstract

Abstract

In the numerical simulation of hypervelocity impact problems, the equation of state (EOS) is used to calculate the pressure of the material. In order to simulate the hypervelocity impact problems more accurately, a new EOS which has a clear expression and the ability to deal with the phase transformation, is established based on the Grover scaling-law EOS and the molecular dynamics (MD) method. The MD method was used to calculate the cold energy and the cold pressure of the material. In this paper, all numerical results are achieved through a cylindrical-coordinate material point method (MPM) calculating program. By comparing the numerical results with the experimental result, the shape and size of the debris cloud calculated with the new EOS are both more similar to the experimental result than the ones calculated with the traditional equations of state. The effectiveness of the new EOS is proven. The new EOS is valuable in the numerical research on hypervelocity impact problems.
- hypervelocity impact,
- material point method (MPM),
- equation of state (EOS),
- molecular dynamics

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References(15)

References

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