A Comparative Study of Damage Performance of the Kill Element from Different Materials

Abstract

For the design o f the novel anti-explosive reactive armor tandem warhead, a prerequisite is to improve the reaming capacity and the damage performance o f the preceding kill element so that the channel is ready fo r the subsequent penetration by the kill element. Meanwhile, the selection o f appropriate shaped charge liner material in the warhead could help enhance the integrated penetration performance o f the kill element. Traditional shaped-charge liners made o f metals or metal alloys with high density, high sound speed and good ductility are capable o f form ing a good-shape and stable je t kill element, which also demonstrate the advantages o f large impact and high-performance penetration depth against the target. When the traditional liners are used to impact reactive armor, however, the weak reaming capacity and easily-induced charge explosions prevent the subsequent penetration o f kill element into the main armor. In addition, the je t kill element form ed by shaped-charge liners with low-density materials generally displays a low penetration depth against the reactive armor. In the present study, filled modifiedpolytetrafluoroethylene (PTFE) was selected as the material ofthe shaped charge liner. The damage performances on the armor from the kill elements form ed with metallic or nonmetallic liners were evaluated and compared based on the numerical simulations and experimental studies. The results showed that the head diameter o f the PTFE-Cu je t kill element was increased by 11.1% as compared to the PTFE je t kill element, and the form er was twice as large as that o f the copper je t kill element. The stronger reaming capacity against the target was essential fo r the opening o f a channel fo r the tandem warhead's subsequent element. In addition, when compared to the PTFE je t kill element, the penetration depth and the je t hole diameter o f the PTFE-Cu one were increased by 45.8 and 12.6%, respectively, demonstrating the high damage potential o f the PTFE-Cu je t kill element. Therefore, the present comparative analysis o f the kill element damage performance with different materials under high-speed impact loading has provided a reference fo r the research and the design o f the anti-armor tandem warhead with large penetration apertures and high damage performance.

Effect of the Fabrication Technique on Compressive Properties of Cu‐PTFE Composites

“…Cu-PTFE (polytetrafluoroethylene) composites serve as an important benchmark for the current development of lowdensity materials, which can be used in military and civilian fields as reactive structural materials for target damage or barrier breaking [1,2]. Although the damage performance of low-density materials has previously been investigated [3,4], little importance has been placed on the compressive properties of the material prior to experiments.…”

Numerical Simulation of Tandem Shaped Charge Penetrating Armored Target under Explosive Loading

“…e high velocity part of the main jet is deflected and dispersed, and the main jet formed by the rear main warhead is disturbed and destroyed by ERA, which cannot effectively play its antiarmor role [20,21]. In view of this situation, researchers at home and abroad have proposed that the front-stage warhead of tandem warhead should be designed into a low-density material warhead [22][23][24][25]. In this way, under the action of explosive loading, the front-stage low-density jet penetrates a small hole in the reactive armor but does not detonate, then the rear-stage main warhead forms a main jet through the hole to penetrate the main armor, thus realizing the penetration to reactive armor without detonation; meanwhile, the effect of the front-stage jet penetrating ERA on the penetration performance of the rear-stage main jet is avoided, and the penetration power of the rear-stage shaped charge to the main armor is improved effectively.…”