Numerical simulation of high speed penetration into concrete by steel projectiles

During the high speed penetration process, there is an upper limit velocity for the rigid body penetration theory. When the impact velocity excess the critical value, the distortion and eroding of projectile must be considered, and the penetration depth will decrease. In this paper, the high speed concrete penetration by steel projectile arc simulated using the LS-DYNA programme. The plastic kinematic hardening model (P-K model) is used for the steel projectile and the contact and eroding between the projectile and the concrete target are controlled. The numerical simulation results show the critical limit velocity really exists for blunting and eroding projectile. The greater the initial impact velocity increase, the severer the projectile nose shape change and eroding become, the penetration depth will reduce. By contrasting the numerical simulation results with the experimental results, the steel projectile model parameters arc chosen to simulate the high velocity penetration into concrete. At last, the penetration ability of three type's projectiles is analyzed by the numerical simulation using the chosen model parameters.