Abstract
The penetration enhancement behaviors of a reactive material double-layered liner (RM-DLL) shaped charge against thick steel targets are investigated. The RM-DLL comprises an inner copper liner, coupled with an outer PTFE (polytetrafluoroethylene)/Al reactive material liner, fabricated via a cold pressing/sintering process. This RM-DLL shaped charge presents a novel defeat mechanism that incorporates the penetration capability of a precursor copper jet and the chemical energy release of a follow-thru reactive material penetrator. Experimental results showed that, compared with the single reactive liner shaped charge jet, a deeper penetration depth was produced by the reactive material-copper jet, whereas the penetration performance and reactive material mass entering the penetrated target strongly depended on the reactive liner thickness and standoff. To further illustrate the penetration enhancement mechanism, numerical simulations based on AUTODYN-2D code were conducted. Numerical results indicated that, with increasing reactive liner thickness, the initiation delay time of the reactive materials increased significantly, which caused the penetration depth and the follow-thru reactive material mass to increase for a given standoff. This new RM-DLL shaped charge configuration provides an extremely efficient method to enhance the penetration damage to various potential targets, such as armored fighting vehicles, naval vessels, and concrete targets.
Highlights
PTFE-based reactive materials are formed by mixing active metal powders within the fluoropolymer binder and are consolidated via a pressing/sintering process, such as PTFE/Al [1,2], PTFE/Ti [3], and PTFE/Cu [4]
Under the experimental the conditions, the penetration termination of the shaped charge against steel target is that the penetration termination of the reactive material-copper liner (RM-CL) shaped charge against steel target is that the reactive materials reactive undergo the deflagration during the and penetration and produce undergo materials the deflagration reaction during the reaction penetration process produceprocess large amounts of gas large amountsenergy, of gas and chemical serious instability of the precursor copper and chemical resulting in a energy, serious resulting instabilityinofathe precursor copper jet, which eventually jet, which leads to theable residual jet not penetration; being able tothis continue penetration; this leads of tothe an leads to theeventually residual jet not being to continue leads to an early termination early termination of the penetration process
The penetration enhancement behaviors of reactive material-copper liner shaped charge against a steel target were studied, and its penetration performance and damage mechanism were investigated by both experiments and simulations
Summary
PTFE-based reactive materials are formed by mixing active metal powders within the fluoropolymer binder and are consolidated via a pressing/sintering process, such as PTFE/Al [1,2], PTFE/Ti [3], and PTFE/Cu [4]. These reactive materials are a class of energetic materials that are formulated to release their chemical energy under intense dynamic loadings or high pressures and high strain rates [5,6]. Owing to the unique and excellent performance, shaped charges with reactive material liners
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