Analytical and numerical method of velocity fields for the explosively formed projectiles

Abstract

The current paper presents analytical and numerical approaches of velocity performances estimations for the EFP (Explosively Formed Projectiles). The proposed analytical methods mathematically develop velocities parameters of a particular segment for EFP liner propelled by explosive process. This model is based on the well-known theoretical approaches of energy distribution on plastic body in dynamical conditions providing integral solution for projectile final velocity. The redundant to analytical, the numerical method is also developed, to provides estimations about behavior of projectile vs. time in the EFP forming process powered by explosion. Both models are valid for performances estimations of EFP warheads and design data for optimal EFP configuration. Simulations are supported by the software Matlab and Autodyn for analytical and numerical modeling respectively. The obtained numerical and analytical results are compared with the available experimental data.

Keywords

• explosively formed projectiles
• analytical method
• numerical simulation
• velocities distribution