Simulation of dynamic compression of plastic-bonded explosives considering heterogeneous structure

Fu Hua; Li Kewu; Li Tao; Liu Cangli; Peng Jinhua

doi:10.11883/1001-1455(2016)01-0017-07

Volume 36 Issue 1

Oct. 2018

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Fu Hua, Li Kewu, Li Tao, Liu Cangli, Peng Jinhua. Simulation of dynamic compression of plastic-bonded explosives considering heterogeneous structure[J]. Explosion And Shock Waves, 2016, 36(1): 17-23. doi: 10.11883/1001-1455(2016)01-0017-07

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Fu Hua, Li Kewu, Li Tao, Liu Cangli, Peng Jinhua. Simulation of dynamic compression of plastic-bonded explosives considering heterogeneous structure[J]. Explosion And Shock Waves, 2016, 36(1): 17-23. doi: 10.11883/1001-1455(2016)01-0017-07

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Simulation of dynamic compression of plastic-bonded explosives considering heterogeneous structure

doi: 10.11883/1001-1455(2016)01-0017-07

Fu Hua^{1, 3
,},
Li Kewu¹,
Li Tao¹,
Liu Cangli²,
Peng Jinhua³

1.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
3.
Department of Chemistry, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

Received Date: 2014-06-27
Rev Recd Date: 2014-09-10
Publish Date: 2016-01-25

Abstract

Abstract

The plastic-bonded explosives (PBX) simulation model with heterogeneous crystal grain and binder was presented using the discrete element method(DEM). By loading opposite flyers at both ends of the explosive sample, the dynamic compression simulation was performed adopting velocity as the boundary condition instead of stress as the boundary condition in the Hopkinson test, and replicated the compression process in the Hopkinson test. The stress-strain curves and their corresponding damage fracture images under different loading-unloading paths in the explosive sample were captured. Our simulation results indicated that the stress distribution in PBX is not uniform and the stress propagates in the form of stress bridges between crystals due to the heterogeneous structure. The actual stress in PBX can be higher than that shown by the curve's peak stress. The samples on the unloading hysteresis curves reveal local damage, while those on the completely softening curves indicate fractures resulting from integral instability.
- solid mechanics,
- dynamic compression,
- discrete element method,
- plastic-bonded explosives,
- SHPB experiment

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References(13)

References

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