Design of concrete shield against the combination of penetration and explosion of warheads

CHENG Yuehua; ZHOU Fei; WU Hao

doi:10.11883/bzycj-2022-0346

Volume 43 Issue 4

Apr. 2023

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CHENG Yuehua, ZHOU Fei, WU Hao. Design of concrete shield against the combination of penetration and explosion of warheads[J]. Explosion And Shock Waves, 2023, 43(4): 045101. doi: 10.11883/bzycj-2022-0346

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CHENG Yuehua, ZHOU Fei, WU Hao. Design of concrete shield against the combination of penetration and explosion of warheads[J]. Explosion And Shock Waves, 2023, 43(4): 045101. doi: 10.11883/bzycj-2022-0346

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Design of concrete shield against the combination of penetration and explosion of warheads

doi: 10.11883/bzycj-2022-0346

College of Civil Engineering, Tongji University, Shanghai 200092, China

Received Date: 2022-08-09
Rev Recd Date: 2023-01-09

Available Online: 2023-02-20

Publish Date: 2023-04-05

Abstract

Abstract

Accurately evaluating the damage and failure of concrete shield subjected to combination of penetration and explosion of warheads can provide an important reference for the design of protective structures. Firstly, based on the frame of Karagozian & Case (K&C) model, a newly dynamic-damage constitutive model was established. The hydrostatic pressure, Lode angle, strain rate, and damage were all considered in strength surface. The tension and compression damages were described separately with a continued transition. Besides, the contribution of shear deformation and hydrostatic compression were also considered. Then, the combined penetration and explosion test of 105-mm-caliber projectile on the semi-infinite concrete target was conducted. The corresponding numerical simulation was conducted to verify the accuracy of the constitutive model, the parameters, and the finite element analysis approach in describing the dynamic resistance of concrete. Furthermore, by conducting the numerical simulations of the existing prefabricated hole charge explosion test on the finite concrete plane, the accuracy of the established constitutive model, parameters, and finite element analysis approach in describing the damage evolution and cracking behavior of concrete was validated. Finally, the perforation limit and scabbing limit of normal strength concrete subjected to the combination of penetration and explosion of three typical warheads at sound velocity were determined. The results show that, the perforation limits of the SDB, WDU-43/B, and BLU-109/B warheads are 1.4, 3.4 and 3.8 m, respectively. The scabbing limit are 3.6, 6.3 and 8.3 m, respectively. Due to the differences of the explosive mass in warheads, the ratios of perforation limit and scabbing limit under combined penetration and explosion to the depth of penetration are not constant. The corresponding ratio ranges are 1.49−2.13 and 2.90−4.66, respectively.
- concrete shield,
- combined penetration and explosion,
- perforation limit,
- scabbing limit,
- protective design

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References

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