Critical detonation velocity calculation model of cylindrical covered charge impacted by fragment

WANG Xin; JIANG Jianwei; WANG Shuyou; MEN Jianbing

doi:10.11883/bzycj-2017-0271

Volume 39 Issue 1

Oct. 2018

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WANG Xin, JIANG Jianwei, WANG Shuyou, MEN Jianbing. Critical detonation velocity calculation model of cylindrical covered charge impacted by fragment[J]. Explosion And Shock Waves, 2019, 39(1): 012302. doi: 10.11883/bzycj-2017-0271

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Critical detonation velocity calculation model of cylindrical covered charge impacted by fragment

doi: 10.11883/bzycj-2017-0271

School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China

Received Date: 2017-08-09
Rev Recd Date: 2017-10-18
Publish Date: 2019-01-05

Abstract

Abstract

In this work, to obtain the critical detonation velocity calculation model about the cylindrical covered charge impacted by fragments, we added the correction terms to the velocity calculation based on the Picatinny engineering criterion. We found out about the influence of the fragment impact angle and the charge curvature radius on the critical detonation velocity using the AUTODYN software through simulating the tungsten fragment impact cylindrical steel casing filled with B explosive. Based on the fitting expression, we established the critical velocity calculation model of the explosive initiation considering the impact angle and the charge shape function. The model calculation values are in good agreement with the experimental data and the simulation results, thereby suggesting that the model can provide a better prediction of the impact initiation of the cylindrical covered charge.
- critical velocity,
- impact initiation,
- cylindrical covered charge,
- calculation model

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References

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