Perforation Simulations of High-Strength Steel by Steel Core Bullets

Material experiments were performed to identify dynamic constitutive model parameters for steel core of 7.62 mm39 mm bullets and N-1 high-strength steel. Highly detailed FE model of the projectile and steel target plate was built up. The J-C fracture rule for the target plate was modified and implemented with LS-DYNA. The process of N-1 steel being impacted by steel core projectile was simulated with the modified fracture rule. Adiabatic shear behavior and the size of plug from the target plate are predicted accurately. Ballistic limit velocity simulation agrees well with experimental result. In this way, the unreasonable tensile failure within steel target and the underestimation of plug size predicted based on original J-C fracture rule are overcome.