复合结构活性破片对双层靶标毁伤效应

研究可承受炸药爆炸加载的活性破片毁伤威力具有实际应用意义。通过14.5 mm口径弹道枪加载试验分析铝粉与聚四氟乙烯复合结构活性破片撞击不同组合形式下双层靶标毁伤效应，并采取多元回归分析方法建立活性破片对前层板的穿孔直径和后层板的扩孔面积经验公式。结果表明：在800~1 400 m/s速度范围内，活性破片撞击前层钢板或铝板形成的穿孔直径随着速度、靶厚增大而增加，而撞击碳纤维复合材料板形成的穿孔直径与速度、靶厚无关，且钢板、铝板、碳纤维复合材料板穿孔直径分别是破片直径的1.25~1.62倍、1.08~1.42倍、1.13倍；活性破片对后层铝板或碳纤维复合材料板呈现扩孔撕裂毁伤模式，且前层板强度越大，撞击速度越高，则扩孔毁伤面积越大，同时对碳纤维复合材料板毁伤应着重考虑背面碳纤维与树脂基体剥离分层模式；建立的毁伤效应经验公式准确、可靠，经试验验证其相对误差控制在5%以内，能够为活性破片对双层靶标毁伤评估提供参考。

Damage Effect of Composite Structural Reactive Fragments on Double-layer Targets

It is of great significance to study the damage power of reactive fragments which can withstand the loading of explosive. The damage effect of Al/PTFE composite structural reactive fragments on the different types of double-layer targets is studied through the loading experiment with 14.5 mm ballistic gun. The empiricial formulas of penetration diameter in front layer plate and expanding perforation area on rear layer plate were established using multiple regression analysis. The results show that the penetration diameter in front layer steel or aluminum plate increases with the rising of impact velocity and target thickness in the range of 800-1 400 m/s. The penetration diameters in the steel, aluminum and carbon fiber composite plates are 1.25-1.62 times, 1.08-1.42 times and 1.13 times of fragment diameter, respectively. Expanding and tearing damages are caused to the rear layer aluminum plate or the carbon fiber composite plate by the ractive fragments. The expanding perforation area increases with the increase in front layer target strength and impact velocity, and the delamination of carbon fiber and resin matrix for the back of carbon fiber composite plate should be considered in damage assessment. The empiricial formulas were proved to be accurate and reliable, and the relative error was controlled within 5% through experiment.