Study on damage law of projectile charge penetrating three-layer steel plate

Abstract

Aiming at the problem that the projectile charge is easy to be damaged when penetrating multi-layer targets, which affects the safety of use, the light gas gun was used as the loading source to carry out the experiment of projectile penetration into single-layer, two-layer and three-layer 45# steel plates. The damage states of projectile charge were obtained by industrial CT technology. Combined with the numerical simulation results, the formation and evolution mechanism of projectile charge damage was analyzed. The results show that when the projectile charge penetrates the three-layer steel plate at an angle of 15 ° at the speed of 400m / s, the charge damage appears after penetrating the second layer steel plate, and mainly occurs at the tail of the charge. When penetrating the third layer steel plate, the damage expands along the axial and transverse direction; The tensile wave formed by the reflection of the free surface at the tail of the charge is the main reason for the formation of damage. The repeated action of compression and tension of the charge leads to the continuous evolution and expansion of cracks.