Study on Numerical Simulation of Initiation Effect of Kinetic Energy Block to Covered Explosive

Abstract

The shock initiation of kinetic energy block with large mass to different covered explosives was described. Using Ansys AutoDyn-3D simulation software, three typical explosive (Comp.b, PBX-9404 and OCT) are chose. Through calculating the kinetic energy block impacting covered explosive with 10# steel cover plate of 10mm to 40mm at angles of 0 to 80, critical velocity for ignition which can initiation explosive has been gained, and functions of velocity-impact angle at different cover thickness are also obtained. The results show that initiation velocity increases nonlinearly with the impact angle; initiation mechanism of explosives is different because of different sizes of impact angles; PBX explosive is more liable than the other two explosives. The results provide data support to warhead design of air defense and damage assessment.