Numerical simulation of anti-penetration performance of corrugated plate/aluminum foam sandwich structure

Abstract

In order to study the anti-penetration performance of corrugated plate/aluminum foam composite sandwich structure, LS-DYNA software was used to simulate. The penetration model of 7.62 mm rifle bullet into the sandwich structure was established, and the residual velocities of bullets at five penetration positions were compared and analyzed. The influence of different initial velocity forward penetration and initial velocity 900m/s angle penetration on B is focused. The results show that at different penetration positions, the residual velocity of bullet B is the largest and the anti-penetration performance is the weakest. With the decrease of the initial velocity of the bullet, the movement of the bullet in the structure is different, and the deflection phenomenon occurs when the bullet is penetrating B. When different penetration angles (initial velocity 900m/s) penetrate B, the trajectory of the bullet is approximately a straight line along the penetration angle. When the penetration angle is 30°, it cannot completely penetrate the sandwich structure. The deformation of sandwich structure is mainly shear deformation; under different conditions, the bullet runs through the sandwich structure only at the initial speed of 900 m/s. This study can provide basis and reference for the improvement and application of corrugated plate/aluminum foam composite sandwich structure.