Investigation on anti-penetration performance of reinforced concrete targets based on ANSYS/LS-DYNA

Abstract

Based on the perforation experiment carried by S.J.Hanchak et al, the finite element method (FEM) model of the reinforced concrete (RC) target was set up. After obtaining the residual velocities of a projectile, the feasibility of this model was verified. On this basis, the effects of the inclination angle and impact position on the penetration resistance of the RC target were analyzed by ANSYS/LS-DYNA. Besides, three targets compared their penetration resistance with the RC target according to residual velocities and target damages. Three main conclusions were drawn: (1) the plastic deformation of the first and third steel layer is intensified with the inclination angle increasing, and the projectile kinetic energy is dissipated more, which improves the penetration resistance of the RC target;(2) the penetration resistance of the RC target is aggravated by the impact position at a high reinforcement ratio (3%), especially when impacting at the crossing point of steel bars;(3) based on the same condition, the anti-penetration performance of four targets is listed as follows: SC target > RC target ≈ SSC target > Concrete target.