Analysis of the mass of behind-armor debris generated by RHA subjected to normal penetration of variable cross-section EFP

Boyang Xing,Hao Zhou,Zhenyan Guo,Yunhui Hou,Rui Guo,Liang Chen,Dongjiang Zhang,Rongzhong Liu,Jianhua Luo,Yongliang Yang

doi:10.1016/j.dt.2018.10.006

Boyang Xing, Hao Zhou + Show 8 more

Open Access

https://doi.org/10.1016/j.dt.2018.10.006

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Abstract

Abstract Analyzing the mass of behind-armor debris (BAD) generated by Rolled Homogeneous Armor (RHA) subjected to normal penetration of variable cross-section Explosively Formed Projectile (EFP) is the purpose of this paper. So theoretical analysis, numerical simulation and experimental data are combined to analyze the influence of variable cross-section characteristic on the time history of crater radius. Moreover the relationships between time history of crater radius (as well as mass of BAD) and the thickness of RHA (from 30 mm to 70 mm) and the impact velocity of EFP (1650 m/s to 1860 m/s) are also investigated. The results indicate that: 1) being compared to the variable cross-section characteristic is ignored, the theoretical time history of crater radius is in better agreement with the simulation results when the variable cross-section characteristic is considered; 2) being compared to the other three conditions of plug, the theoretical mass of BAD is in the best agreement with the simulation results when the shape of plug is frustum of a cone and the angle between generatrix and bottom is 45° and the axial length of mushroom is considered.

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