Research on the formation behavior of PTFE/Al reactive explosively formed projectile

Abstract

Based on AUTODYN-3D finite element analysis platform, the SPH algorithm is used to simulate the forming characteristics of Al/PTFE reactive Explosively Formed Projectile (EFP). The evolution behaviors and distribution of morphology, velocity, density, and temperature field during the reactive EFP were analyzed. Numerical simulation results show that Al/PTFE reactive shaped charge can form stable reactive EFP, and the overall density of reactive EFP decreases with the extension of the forming time, and the density of reactive EFP is much lower than the initial density of reactive liner. When the reactive EFP is in the state of freely flying, the high temperature region mainly concentrates on the tail of the reactive EFP, the bottom of the reactive liner and the fracture flying zone, and the high temperature region proportion is significantly affected by the explosive type, the curvature radius of the reactive liner and the wall thickness of the reactive liner.