玻璃钢-聚氨酯泡沫夹层板抗破片侵彻贯穿研究

为研究环氧树脂玻璃钢-聚氨酯泡沫夹层复合材料靶的抗弹性能，利用弹道枪发射钨合金球形破片撞击不同厚度的单层板及不同组合方式的夹层靶板.获得了不同入射速度下靶板的破坏形貌，通过高速摄影测得破片初速与余速，并利用上下调整速度法估算出靶板弹道极限速度，分析了结构特征对复合材料靶比吸收能的影响，在此基础上，对常用理论模型进行计算对比分析.结果表明:玻璃纤维抽拔、拉伸断裂是靶板吸收能量的主要方式；聚氨酯泡沫抗弹性能较差，作为夹层材料主要作用是防护冲击波；靶板的比吸能与面密度之间呈二次函数抛物线关系，而在相同面密度下，夹层板的吸能总体上是随着玻璃钢占比的增加而增强；THOR公式更加适用于这种材料夹层板的弹道极限计算. 

Impact Resistance of Glass Fiber Reinforced Plastic-Polyurethane Foam Sandwich Panels Against Projectiles

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.