Analysis of Prefabricated Fragment Intrusion Damage Based on Complete Restart Technique

To study the damage to the target plate under the combined action of shock wave and fragment, using the complete restart technique to extract the damage of the target plate after the action of the shock wave, and then a single fragment penetrating target plate is simulated. The Arbitrary Lagrange-Euler (ALE) algorithm and Particle Blast Method (PBM) algorithm are used to analyze the damage to the target plate by prefabricated fragments after the explosion and compare with the test to verify the feasibility of the PBM algorithm. Completely restart the target plate under the action of the shock wave generated by PBM algorithm. The Ls-dyna software is used to simulate the fragment penetration into the target plate, so as to obtain the damage of the target plate under different incidence angles. The simulation results show that the combined action of shock wave and fragment has a strong penetration ability; the end penetration capability of cylindrical fragment is greater than that of lateral penetration; the fragment penetration ability is the strongest at vertical incidence.