Analysis of Ballistic Impact of Blunt Striker on Aluminum-Honeycomb Panels

In this paper, a new analytical model has been presented for energy absorption of aluminum-honeycomb sandwich panels under high velocity impact. In high velocity impact, striker with initial velocity penetrates into target and perforates it completely and exits by residual velocity. The panels consist of hexagonal honeycomb core sandwiched between two aluminum skins. In analytical model cylindrical projectile with flat ended have been considered. It is supposed that aluminum skins failure by mean resistive pressure. Energy absorption of honeycomb has been determined by wierzbicki model. Energy balancing equation has been employed for determination the ballistic limit and residual velocity of striker. The results of ballistic limit and residual velocity of striker computed by new model have good agreement with experimental results. Also the effects of projectile mass and diameter and cell diameter of honeycomb in energy absorption of sandwich panel has been investigated.