爆炸冲击波与破片联合作用下泡沫夹芯板的毁伤特性研究

The dynamic response and damage experiments of foam aluminum panel under the combined action of air explosion shock wave and high-speed fragments were carried out. The effects of different explosion distances on the perforation distribution characteristics, core damage characteristics and damage morphology of the back plate were analyzed. Meanwhile, the formation mechanism of petal-shaped crevasses of the back plate was discussed. The research shows that it is an effective method to generate the combined load of blast wave and fragments by driving prefabricated fragments with explosive charge. Foam aluminum sandwich panels produce various failure modes under the combined action of explosion shock wave and fragment groups. Among them, there are a series of failure modes in the core layer of foam aluminum sandwich panel, such as local perforation, shear of core layer and interface failure between core layer, etc. The backboard has damage modes such as honeycomb-shaped pore groups and petal cracking. In the case of dense fragments, the center of back plate is prone to petal cracking similar to that of local contact explosion, and materials with better tensile properties should be selected.