A model for rigid sharp-nosed projectile perforating metallic targets considering free-surface and cracking effects

Xiao Yunkai; Fang Qin; Wu Hao; Kong Xiangzhen; Peng Yong

doi:10.11883/1001-1455(2016)03-0359-11

Volume 36 Issue 3

Oct. 2018

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Article Navigation > Explosion And Shock Waves > 2016 > 36(3): 359-369

SONG Shun-cheng, WANG Ting-hui, CAI Hong-nian, WANG Fu-chi. Numerical calculations of adiabatic shearing localization of steel projectile impacting concrete[J]. Explosion And Shock Waves, 2007, 27(3): 246-250. doi: 10.11883/1001-1455(2007)03-0246-05

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Xiao Yunkai, Fang Qin, Wu Hao, Kong Xiangzhen, Peng Yong. A model for rigid sharp-nosed projectile perforating metallic targets considering free-surface and cracking effects[J]. Explosion And Shock Waves, 2016, 36(3): 359-369. doi: 10.11883/1001-1455(2016)03-0359-11

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A model for rigid sharp-nosed projectile perforating metallic targets considering free-surface and cracking effects

doi: 10.11883/1001-1455(2016)03-0359-11

State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science & Technology, Nanjing 210007, Jiangsu, China

Received Date: 2014-10-10
Rev Recd Date: 2015-01-28
Publish Date: 2016-05-25

Abstract

Abstract

Treating the target as the incompressible material, by assuming that the cavity expansion produce plastic-elastic response region, the decay function for the back free-surface effect of target is constructed. The forcing function of metallic targets for perforation is obtained by multiplying the forcing function of compressible Strain-Harding targets with the decay function. Based on the three stage of elastic-decaying, plastic-decaying and cracking, the analytical model considering the compressibility, the back free-surface effect of target and cracking is established, and the analytical equation of instantaneous velocity of projectile is deduced. The deceleration, instantaneous and residual velocity of projectile is calculated by numerical methods. Through comparison with six sets of experimental data and other existing models, with the target thickness and impact velocity in a certain range, the free-effect should be considered.
- solid mechanics,
- perforation model,
- theory of cavity expansion,
- free-surface effect,
- rigid sharp-nosed projectile,
- metallic plate

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References(25)

References

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