Extension of Cavity Expansion Theory to Penetration Process in Pre-Drilled and Damaged Concrete Targets

Analysis of penetration in pre-drilled and damaged concrete targets is the main part of anti-structure tandem warhead researches. In this paper the penetration process of the KE projectiles is investigated in pre-drilled and damaged concrete targets by analytical and numerical method. In this research, it has been tried to modify the teland model for achieving an accurate and efficient analytical model for using in tandem warhead design, since there are little analytical models in this area. In the modified model the effect of front cavity, friction and damage is considered. Then the numerical simulation of the problem has been performed in AUTODYN code. The comparison between the results of modified analytical model and experimental data and numerical method show good agreement. Most significant achievement in this research, provide a modified model for determining penetration depth in pre-drilled and damaged concrete targets.