Numerical investigation on damage and failure of concrete targets subjected to projectile penetration followed by explosion

WANG Yin; KONG Xiangzhen; FANG Qin; HONG Jian; ZHAI Yangxiu

doi:10.11883/bzycj-2021-0132

Volume 42 Issue 1

Jan. 2022

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WANG Yin, KONG Xiangzhen, FANG Qin, HONG Jian, ZHAI Yangxiu. Numerical investigation on damage and failure of concrete targets subjected to projectile penetration followed by explosion[J]. Explosion And Shock Waves, 2022, 42(1): 013301. doi: 10.11883/bzycj-2021-0132

Citation:

WANG Yin, KONG Xiangzhen, FANG Qin, HONG Jian, ZHAI Yangxiu. Numerical investigation on damage and failure of concrete targets subjected to projectile penetration followed by explosion[J]. Explosion And Shock Waves, 2022, 42(1): 013301. doi: 10.11883/bzycj-2021-0132

Citation:

WANG Yin, KONG Xiangzhen, FANG Qin, HONG Jian, ZHAI Yangxiu. Numerical investigation on damage and failure of concrete targets subjected to projectile penetration followed by explosion[J]. Explosion And Shock Waves, 2022, 42(1): 013301. doi: 10.11883/bzycj-2021-0132

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Numerical investigation on damage and failure of concrete targets subjected to projectile penetration followed by explosion

doi: 10.11883/bzycj-2021-0132

1.
State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China
2.
Engineering Research Center for Safety and Protection of Explosion & Impact of Ministry of Education, Southeast University, Nanjing 211189, Jiangsu, China

Received Date: 2021-04-14
Accepted Date: 2021-12-01
Rev Recd Date: 2021-05-24

Available Online: 2021-12-02

Publish Date: 2022-01-20

Abstract

Abstract

Based on the recently proposed Kong-Fang concrete material model and the fluid structure interaction (FSI) and restart algorithms available in the LS-DYNA, the damage and failure of concrete targets subjected to projectile penetration followed by explosion were numerically investigated. The numerical model, material models along with the corresponding parameters were firstly validated by comparing the numerical simulation results of the large-caliber projectile penetration experiment and the charge explosion test of a concrete target with a precast hole to the corresponding test data in terms of the penetration depth and scabbing depth, respectively. Then numerical simulations of the damage and failure in concrete targets struck by a typical warhead were conducted using three different modeling methods, i.e., charge explosion in a concrete target with a precast hole, charge explosions without and with projectile shell using the restart algorithm. The numerical results demonstrate that the crater diameter of the concrete target caused by explosion is only three times the projectile diameter when the pre-damage during the penetration process is not considered, and the damage and failure patterns are different from those using the other two methods. The numerically predicted crater diameter is very large when considering the pre-damage during the penetration process, as expected. However, the final crater diameter when the projectile shell is considered (about 14.5 times the projectile diameter) was slightly smaller than that without the consideration of projectile shell (around 16 times the projectile diameter), which mainly because part of the explosion energy is dissipated by the deformation and fracture of the projectile shell. The predicted crater depth with the consideration of projectile shell is increased by 5% compared with that ignoring the projectile shell, mainly due to the secondary penetration of the fragmentized warhead. The present numerical results can provide a reliable reference for further experimental investigation on the damage and failure of concrete targets subjected to projectile penetration followed by explosion.
- penetration followed by explosion,
- concrete damage and failure,
- pre-damage,
- secondary penetration

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References(28)

References

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