Numerical simulation on spallation and fragmentation of tin under explosive loading

HE Nianfeng; REN Guowu; CHEN Yongtao; GUO Zhaoliang

doi:10.11883/bzycj-2017-0354

Volume 39 Issue 4

Mar. 2019

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HE Nianfeng, REN Guowu, CHEN Yongtao, GUO Zhaoliang. Numerical simulation on spallation and fragmentation of tin under explosive loading[J]. Explosion And Shock Waves, 2019, 39(4): 042101. doi: 10.11883/bzycj-2017-0354

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HE Nianfeng, REN Guowu, CHEN Yongtao, GUO Zhaoliang. Numerical simulation on spallation and fragmentation of tin under explosive loading[J]. Explosion And Shock Waves, 2019, 39(4): 042101. doi: 10.11883/bzycj-2017-0354

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Numerical simulation on spallation and fragmentation of tin under explosive loading

doi: 10.11883/bzycj-2017-0354

Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

Received Date: 2017-09-30
Rev Recd Date: 2018-04-02

Available Online: 2019-03-25

Publish Date: 2019-04-01

Abstract

Abstract

Spallation and fragmentation of tin, a low-melting point metal under explosive loading were numerically simulated. The numerical method and material model used were validated by the experimental results. Thereby, the temporal evolution and spatial distribution of the physical quantities in the Sn specimens were compared to explore the interaction between the stress waves and the material in the specimen under impact loading and unloading. Furthermore, the dynamic behaviors of the specimens with various thicknesses under explosive loading were in-depth analyzed to further understand the evolution mechanism of the spallation and fragmentation under the combination action of the reflective rarefaction wave from the free surface, the lateral rarefaction wave and the incident rarefaction wave. The results show that for the thin specimen, the early spallation and fragmentation are dominated by the reflective rarefaction wave. With increasing the thickness of the specimen, the region dominated by the reflective rarefaction wave becomes smaller, and meanwhile the region dominated by the incident rarefaction wave and the lateral rarefaction wave becomes larger.
- explosive loading,
- tin,
- spallation and fragmentation,
- stress wave,
- evolution mechanism

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References

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