Numerical simulation of pre-shock desensitization in TATB-based heterogeneous explosive

HUANG Kuibang; LIU Yiru; HONG Tao; YU Xin; PENG Wenyang; SHU Junxiang

doi:10.11883/bzycj-2020-0100

Volume 41 Issue 3

Mar. 2021

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HUANG Kuibang, LIU Yiru, HONG Tao, YU Xin, PENG Wenyang, SHU Junxiang. Numerical simulation of pre-shock desensitization in TATB-based heterogeneous explosive[J]. Explosion And Shock Waves, 2021, 41(3): 032301. doi: 10.11883/bzycj-2020-0100

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HUANG Kuibang, LIU Yiru, HONG Tao, YU Xin, PENG Wenyang, SHU Junxiang. Numerical simulation of pre-shock desensitization in TATB-based heterogeneous explosive[J]. Explosion And Shock Waves, 2021, 41(3): 032301. doi: 10.11883/bzycj-2020-0100

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Numerical simulation of pre-shock desensitization in TATB-based heterogeneous explosive

doi: 10.11883/bzycj-2020-0100

HUANG Kuibang^{1, 2
,},
LIU Yiru^{1
,
,},
HONG Tao¹,
YU Xin¹,
PENG Wenyang²,
SHU Junxiang³

1.
Beijing Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
2.
Graduate School, China Academy of Engineering Physics, Beijing 100088, China
3.
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

Received Date: 2020-04-02
Rev Recd Date: 2020-05-30

Available Online: 2021-03-05

Publish Date: 2021-03-10

Abstract

Abstract

To study and simulate the pre-shock desensitization in the TATB-based heterogeneous explosive, the impact temperature and pressure based AWSD reaction flow model was implemented in a 2D structured mesh Lagrangian elastoplastic hydrodynamics program. The reactant and product EOS parameters were calibrated against the Hugoniot experimental data. To calibrate the parameters of the reaction flow model, one-dimensional numerical simulations of the shock initiation experiments were carried out. We simulated the double-shock experiments in which a first weak shock was followed by a second strong shock with a time interval of 0.45 μs. The results indicate the reaction becomes slower in the precompressed region and the run-to-detonation distance is about 1 mm longer than that in the uncompressed region, which is consistent with the desensitization in double-shock experiments. When simulating the corner-turning, the detonation wave passes through the corner and forms a stable non-initiation region near the corner, which is consistent with the dead zone characteristics of the corner-turning experiment of the LX-17 explosive with the same main composition. The numerical simulation results show that the AWSD reaction rate model based on the impact temperature and pressure can well simulate the pre-shock desensitization of heterogeneous explosives.
- TATB-based,
- heterogeneous explosive,
- pre-shock,
- desensitization,
- AWSD model

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References(33)

References

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