玻璃钢-聚氨酯泡沫夹层板抗破片侵彻贯穿研究

To study the ballistic performance of epoxy resin FRP/polyurethane foam sandwich composite targets, tungsten alloy spherical fragments were fired from a ballistic gun to impact single-layer targets with different thicknesses and sandwich targets with different combinations of glass fiber reinforced plastic polyurethane foam plates. The failure morphology of the targets at different incident velocities was obtained. The initial and residual velocities of the fragment were measured by high-speed photography, and the ballistic ultimate velocity of the target was estimated by up-down adjustment velocity method. The influence of structural characteristics on the specific absorption energy of the composite target was analyzed. Research results show that the main ways of energy absorption are drawing and tensile fracture of glass fiber, the relation between the specific absorption energy of the target plate and the surface density is quadratic parabola, and the THOR formula is more suitable for calculating the ballistic limit of sandwich plates.