Abstract
An ideally shaped charge warhead is an effective weapon against armored targets. The use of the gathering energy effect generated by the explosion drives the liner to form a shaped charge jet, which can penetrate the armored target. Existing shaped charge warheads often use a metal liner. Herein, we discuss the characteristics of polymer liners. To study the characteristics of the expansive jet formed by the polymer liner, three polymer materials with different properties—polytetrafluoroethylene (PTFE), nylon (PA), and polycarbonate (PC)—were selected. Using the smooth particle hydrodynamics (SPH) method and the AUTODYN finite element software, the expansive jet formation by the polymer liners was simulated and verified by experimental data. The polymer jets of the different materials exhibit a certain degree of expansivity; however, due to differences in the material properties, the expansive diameter of the jet and the degree of head compaction differed. The expansive diameter of the PA jet was the smallest, and that of the PTFE jet was larger than that of the PA jet, but with a smaller compactness. The PC jet exhibited the largest expansive diameter and the highest degree of compactness.
Highlights
The technology underpinning armor and anti-armor devices has driven their mutual development.Currently, shaped charges are effective for damaging advanced protective armor and are used in artillery, rocket, and missile warheads
Previous research studies about shaped charge jets often focused on metal materials, since metal jets can destroy most of the armored targets, but for explosive reaction armored targets, the damage ability of metal jets is greatly reduced
Polymer materials were used as liners for shaped charge warheads
Summary
The technology underpinning armor and anti-armor devices has driven their mutual development. Previous research studies about shaped charge jets often focused on metal materials, since metal jets can destroy most of the armored targets, but for explosive reaction armored targets, the damage ability of metal jets is greatly reduced. Based on these requirements, novel liner materials have been developed, including glass, ceramics, and polymers; among these, polymer liners have been the most extensively investigated. As a key factor of a shaped charge jet, the research into liner materials can be divided into four categories of materials: metal, composite, glass, and polymer. The characteristics of jet formation in a polymer liner are studied, which could provide a theoretical basis for the application of polymer materials in shaped charge warheads
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