Effects of Shell on Bore center Annular Shaped Charges Formation and Penetrating into Steel Targets

Wenlong Xu; Cheng Wang; Jianming Yuan; Weiliang Goh; Bin Xu

doi:10.14429/dsj.70.14599

Wenlong Xu State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing - 100 081, People R China
Cheng Wang State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing - 100 081, People R China
Jianming Yuan Nanyang Technological University, Nanyang Drive - 637 553, , People R China
Weiliang Goh Nanyang Technological University, Nanyang Drive - 637 553, , People R China
Bin Xu State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing - 100 081, People R China

DOI: https://doi.org/10.14429/dsj.70.14599

Keywords: Annular shaped charge, Shell, Numerical simulation, Penetration

Abstract

Annular shaped charge can efficiently create large penetration diameter, which can solve the problem of small penetration diameter of a traditional shaped charge, and thus meeting the requirements of large penetration diameter in some specific situations. In this paper, the influence of five kinds shell structures, i.e. no shell, aluminum shell with thickness of 2.0 mm and steel shell with thickness of 2.0 mm, 3.0 mm and 4.0 mm, on bore-center annular shaped charges (BCASCs) formation and penetrating steel targets was investigated by numerical simulations and experiments. The numerical simulation results are in good agreement with the experimental results. The results showed that, from no shell to aluminum shell of 2.0 mm and then to steel shell of 2.0 mm, 3.0 mm and 4.0 mm for BCASCs, the diameter and radial velocity of projectile head decrease, the axial velocity of BCASC projectiles increases gradually, the penetration diameter of the targets decreases, and the penetration depth increases. The penetration diameter caused by the BCASC with no shell is the largest, being 116.0 mm (1.16D), D is the charge diameter. The penetration depth caused by the BCASC with steel shell of 4.0 mm thickness is the deepest, being 76.4 mm (0.76D).

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