Numerical Simulation of the Effect of Nose Shape on Dynamic Damage of PBX Charge During the Penetration Process

Nose shape has significant influence on dynamic mechanical response of charge during penetration. An user defined material model based on cohesive crack model is constructed to directly simulate the penetration of concrete with LS-DYNA. The damage evolution process of charge is calculated. The influence of caliber-radius-head of ogival nose warhead is analyzed by element crack width and volume fraction of visible crack. The results show that the variation of nose shape for ogival nose warhead has significant influence on dynamic damage, and controlling caliber-radius-head of warhead is beneficial to reduce charge damage.