复合弹冲击四方蜂窝夹芯板的动态特性数值模拟

This paper is dedicated to numerically investigate the dynamic response and deformation/failure mode of the 304 stainless steel square honeycomb sandwich plate under combined shock loading and fragment impact, which is a new technique to simulate combined blast wave and fragment impact by firing composite projectile composed of aluminum foam bullet and fragment simulation projectile. The numerical calculation is carried out by using the finite element analysis software ABAQUS/Explicit. The reliability of the finite element model is verified, and the five-stage dynamic response is presented; moreover, the response in different impact loading conditions is discussed. The results reveal that under different impact loads, the overall dynamic response of sandwich plate is similar. No matter how the impact loading changes, the honeycomb core contributes the most to the protection effect, followed by the lower panel and the upper panel. When the initial velocity remains unchanged, the smaller built-in depth of fragment simulation projectile, the more easily the lower panel of sandwich plate will tear and destroy, but the protection ability of fragment simulation projectile will be enhanced.