Numerical Simulation of Anti-Penetration of Laminated Steel Plate by Hemispherical-Nosed Projectile Using SPH

With the wide application of high strength and high impact-resistant steel structures in armor protection of armor, arsenal protective doors and other military facilities, the impact-resistant properties of steel structures become a major focus and hot spot in defense research.In this paper, we simulated the process of hemispherical-nosed projectile penetration through a multilayer steel plate using smooth particle hydrodynamics, compared its results with those from experiment, and analyzed the failure form of the steel plate after being penetrated by hemispherical-nosed projectile, thereby obtaining the von Mises stress distribution and the residual velocity for the hemispherical-nosed projectile and verifying the effectiveness of SPH in the study of the steel plate penetration by a hemispherical-nosed projectile.We investigated the influence of the number of target plates and the thickness of the steel body on the target's penetration-resistant performance using numerical simulation.The results show that the protective strength of the single-layer steel plate is stronger than that of the multi-layer steel plate with a 3 mm thickness; that when the thickness is 9 mm, the multi-layer steel plate has a better protective capability than the single-layer steel plate; and that when the thickness is 12 mm, the multi-layer steel plate and the single-layer steel plate have similar protective strength.