Experimental Analysis of Ballistic Limit Velocity of Autoclaved Aerated Concrete Targets under Rigid Projectile Penetration

In this paper, experimental analysis of ballistic limit velocity of autoclaved aerated concrete (AAC) targets under rigid projectile penetration is presented. Industrial blocks with dimension of 600×250×20 (mm) were cut into 125×125×50(mm) samples, impacted by gas gun using three different nose shaped projectiles (flat, ogive and conic). In this study damage mechanism and penetration depth were investigated and compared with conventional concrete which revealed significant difference in the initial penetration and cratering phase. Due to difference of weight and initial velocity of the projectiles, initial energy for three- nose shape was measured.. The results show that in low velocity with equal energy, deep penetration has a direct relation with nose shape, but as energy increased, this relation decline which could be found that by rising velocity, shearing mode become dominant. Finally, the result compared and the difference between penetration mechanisms and cratering were discussed and investigated.