Studying normal perforation of monolithic and layered steel targets by conical projectiles with SPH simulation and analytical method

The normal perforation of monolithic and layered Weldox 460 E steel targets by conical projectiles is investigated with smoothed particle hydrodynamics (SPH) simulation and analytical method. A series of SPH simulations are performed for the perforation of monolithic targets with different thicknesses and layered targets with different total thicknesses and layering schemes. According to the simulated results, an empirical relation between ballistic limit velocity and target thickness is determined for monolithic target, and the variation of ballistic resistance with number of layers, total thickness and thickness configuration is revealed for layered target. Based on the established empirical relation for monolithic target, an analytical method is used to analyze the ballistic resistance of layered targets with different total thicknesses and layering schemes. The analytical results are compared with SPH simulation results, and the applicability and accuracy of the analytical method for the present problems are discussed.