Study on the effect of off-axis initiation on the jet forming process and armour-breaking performance of shaped charges

Abstract

To study the effect of off-axis initiation on shaped charge performance. The nonlinear finite element software LS-DYNA is used to simulate the jet forming and armour-breaking process under different initiation offsets (0.025~0.125Dk, Dk is shaped charge diameter). A theoretical model is established to analyse the lateral velocity distribution of jet. The results show that the degree of asymmetric collapse and lateral velocity of jet increase with the offset. When the initiation offset exceeds 0.025Dk, the jet penetration capability of shaped charge jet will be seriously weakened.