Abstract
An analysis of the penetration–explosion (PE) effects of four distributions of inactive/active composite jets shows that a well-designed inactive/active double-layer liner can promote composite jet damage. Penetration experiments were then carried out for shaped charge jets having a single inactive (Cu) liner or an inactive/active (Cu/Al) double-layer liner with variable liner height. The behaviors and firelight patterns of the different jets were captured by high-speed photography. The perforation, deformation area, and deflection were measured for each plate, showing that the Cu/Al jets have stronger PE effects. Numerical simulation shows that the tip of the composite jet generated from the full-height liner is only Cu, whereas for the other jet, from the double-layer liner, Cu is almost wrapped entirely by Al.
Highlights
With smart guidance widely applied in high explosive anti-tank (HEAT), shaped charge jets can avoid the strongest protection and focus on the weakest point of the armor
For jets with inactive/active double-layer liners, it is expected that the inactive part of the composite jet will first penetrate the target, and the active part will generate explosion-like damage inside the hole
Huang et al designed a K-shaped charge with a double-layer liner consisting of Al/Ni and Cu, and the composite jets created much deeper penetration on steel and concrete targets [23]
Summary
Shaped charge jets have remarkable armor-piercing capability and are popular in high explosive anti-tank (HEAT) warheads [1]. Guo et al found that Al/PTFE (polytetrafluoroethylene) active jets can damage steel ingots much more powerfully, even though their penetration depth is much less [13]. For jets with inactive/active double-layer liners, it is expected that the inactive part of the composite jet will first penetrate the target, and the active part will generate explosion-like damage inside the hole. Huang et al designed a K-shaped charge with a double-layer liner consisting of Al/Ni and Cu, and the composite jets created much deeper penetration on steel and concrete targets [23]. Wang et al studied a reactive material double-layered liner shaped charge and investigated its penetration into thick steel targets, and found that the defeat mechanism includes penetration by the precursor Cu jet as well as the energy release by the subsequent. The same effects were obtained by simulating the jet formation numerically, and the experimental and simulation results were well associated
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