Perforation study of steel sheet under high velocity impact using Peridynamic theory

Peridynamic theory is a new method to model material behavior under impact loading. The simplest type of this method is called bond-based peridynamics. The present study is concerned with the modification of the bond-based peridynamic theory to account for inelastic behavior and the modified theory is used to study the dynamic fracture of plates, made of ductile materials, due to impact.  This theory assumes that the bonds between two points can bear stretches more than the yield stretch. In this regard, The modified bond-based theory is used to study the effect of penetration, resulting from the impact of a projectile into a rectangular steel sheet. The results are validated against experimental results, and the crack growth and its propagation paths are studied for different geometric shapes and impact velocities of the projectiles. The results show that with this modification, the bond-based peridynamics could be employed more inclusively to simulate the behavior of materials.