Simulation and Structural Optimization of Projectile Penetration Target Plate Based on Material Point Method

Abstract

In order to avoid the mesh distortion in finite element simulation of penetration and other large deformation problems,numerical models of projectile penetrating three-layer target were established based on material point method. Simulation code was programed by FORTRAN and numerical simulation of projectile penetration into the solid target plate was carried out. The simulation results were compared and verified with the simulation results of finite element method in the existing literature. Then,numerical simulation of projectile penetration into the honeycomb sandwich panels target plate was carried out. It is found that its resistance to penetration ability is significantly improved. Based on the optimized honeycomb sandwich target structure,the penetration of projectile with the same incident velocity into honeycomb sandwich targets with different honeycomb cell wall thickness and honeycomb plate thickness was simulated,and the influence of honeycomb structure parameters on the resistance to penetration ability of the target was analyzed. It is found that with the increasement of thicknesses of honeycomb cell wall and honeycomb plate, the resistance to penetration ability of honeycomb sandwich targets first increases sharply and then flattens. The results provide a new research method for the study of projectile penetration into honeycomb sandwich targets,show a certain idea for the selection and research of armor protective structure. It also expands the application scope of material point method.