Penetration Capability of EFPs Against Explosive Reactive Armor

Abstract

This study aimed to investigate the interference of explosive reactive armor (ERA) on the penetration capability of explosively formed projectiles (EFPs). A numerical simulation model of EFP and the ERA interaction system was established. Flash X‐ray experiments for observing the interaction between EFP and ERA were performed. It turned out that the simulation method and material model was valid. From the numerical simulation, the residual depth of penetration (RDOP) of EFPs with different materials, scales, and shapes at several angles was evaluated, and the mechanism of ERA interference EFP was revealed. The results suggested that after an EFP passed through an ERA, its RDOP to target decreased with an increase in the angle and explosive layer thickness. The higher the density of EFP is, the stronger the resistance ability of EFP to ERA is. For copper EFPs, in the EFP charge diameter range of 90 mm to 170 mm, each 10‐mm growth in the EFP charge diameter results in an approximately 0.025 P0 increment in RDOP (P0 is penetration depth of EFP without ERA interference). Moreover, in the condition of the same mass, for each increase of 1 in the aspect ratio of the EFP, the RDOP increased by approximately 0.05 P0. In addition, calculation models for the RDOP, considering the charge diameter and EFP shape, were established respectively.

Structural Design and Parameter Optimization of Linear Explosive Forming Projectile

“…Brown et al [3] proposed a successful EFP design scheme under meeting three different goals, and compared experimental results predicted results, and performance goals. With the deepening of the understanding of EFP, it was found that the shape of EFP had a great influence on penetration ability [4][5][6][7]. Targets of different materials and EFPs of different shapes were used as research objects in references [4][5].…”

“…With the deepening of the understanding of EFP, it was found that the shape of EFP had a great influence on penetration ability [4][5][6][7]. Targets of different materials and EFPs of different shapes were used as research objects in references [4][5]. It was studied that adding a reinforcing ring between the shell and the liner can improve the shape, structure, and velocity of the EFP significantly in reference [6].…”