Study of Detonation Wave Contours in EFP Warhead

Abstract

An analytical model for calculating the time of shock wave propagating in the wave shaper is presented in this study. The calculation results show that three typical detonation wave contours can be formed in the main charge by changing the thickness of the wave shaper, such as the conical detonation wave, the spherical detonation wave, and the plane detonation wave. The conical detonation wave can greatly increase the explosively formed projectiles (EFP) length–diameter ratio, but the Mach wave may break the nose of the EFP. The spherical detonation wave prevents an increase in the EFP length–diameter ratio. The plane detonation wave can increase the EFP length–diameter ratio and keep the nose of the EFP integrated. The thickness of the wave shaper should be less than and approximately equal to the critical thickness to ensure that the detonation wave can increase the length– diameter ratio of the EFP.