Experimental and numerical studies on penetration resistance of armor steel/UHPC composite targets

CHENG Yuehua; WU Hao; TAN Keke; JIANG Pengfei; ZHANG Dong; FANG Qin

doi:10.11883/bzycj-2021-0278

Volume 42 Issue 5

May 2022

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CHENG Yuehua, WU Hao, TAN Keke, JIANG Pengfei, ZHANG Dong, FANG Qin. Experimental and numerical studies on penetration resistance of armor steel/UHPC composite targets[J]. Explosion And Shock Waves, 2022, 42(5): 053302. doi: 10.11883/bzycj-2021-0278

Citation:

CHENG Yuehua, WU Hao, TAN Keke, JIANG Pengfei, ZHANG Dong, FANG Qin. Experimental and numerical studies on penetration resistance of armor steel/UHPC composite targets[J]. Explosion And Shock Waves, 2022, 42(5): 053302. doi: 10.11883/bzycj-2021-0278

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Experimental and numerical studies on penetration resistance of armor steel/UHPC composite targets

doi: 10.11883/bzycj-2021-0278

1.
Department of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University, Shanghai 200092, China
2.
PLA 96911 Corps, Beijing 100011, China
3.
Nanjing Iron & Steel Co., Ltd., Nanjing 210035, Jiangsu, China
4.
State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

Received Date: 2021-07-01
Rev Recd Date: 2021-09-10

Available Online: 2022-05-05

Publish Date: 2022-05-27

Abstract

Abstract

Armor steel/ultra-high performance concrete (UHPC) composite structures have a wide application prospect in the protective structures against the high-speed projectile penetration. Aiming to evaluate the penetration resistance of the composite targets, both field tests and numerical simulations were carried out on two types of armor steel/UHPC composite targets. Firstly, twelve 30mm-caliber 30CrMnSiNi2A steel projectile penetration tests on different armor steel/UHPC composite targets were conducted with the striking velocities varying from 372 m/s to 646 m/s. Compared to the UHPC target, the armor/UHPC composite targets present high penetration resistance and low areal density. The test results show that the penetration resistance of the NP500/UHPC composite target with an armor steel thickness of 5 mm can be increased by 35.7% compared to that of the NP450/UHPC composite target. Besides, a series of static and dynamic mechanical tests for armor steels were conducted to calibrate the parameters of the constitutive model. Then, 3D finite element models were established and the corresponding numerical simulations were carried out. The parameters of the constitutive model of the armor steel were validated by comparing the experimental penetration depth, residual projectile length and failure mode of the armor steel plate with the numerical results. Furthermore, the impact resistance of the armor steel/UHPC composite targets was discussed quantitatively via the ballistic efficiency factor. For the cases in this study, the composite target with 8mm thick NP500 armor steel exhibits the best ballistic performance. Finally, the critical perforation velocities of two types of armor steels with different thicknesses in the composite targets were determined. The failure modes of the projectile and target were further discussed. As the strength and hardness of the armor steel increase, the failure mode changes from shear plugging failure to ductile hole expansion failure.
- armor steel,
- ultra-high performance concrete,
- composite target,
- penetration,
- ballistic efficiency factor

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References

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