刚性尖头弹扩孔贯穿金属靶板理论模型的讨论

Ductile hole expansion perforation models for a rigid sharp-nosed projectile perforating a metallic plate

针对延性扩孔破坏模式,讨论了刚性尖头弹贯穿韧性金属靶板的已有六个理论模型（F-W、C-L、JZG、WHM、S-W和JBL）对于靶板厚度和弹头形状的适用范围,统一了各模型参数的选取准则,分别给出了JZG模型尖锥头形和尖卵头形弹体半锥角和无量纲曲率半径（CRH）的适用范围。基于12组冲击速度为200~1 600 m/s,厚径比（靶体厚度与弹身直径之比H/d）为0.605~9.17的多种弹靶材料的穿甲实验,得出：对于尖锥头形弹体贯穿靶板后的残余速度,S-W和WHM、JZG、F-W模型分别对于较薄靶板、中等厚度靶板和较厚靶板的预测效果较好;而对于尖卵头形弹体,WHM和JBL模型预测效果较好。同时,各模型对于弹道极限预测效果的结论和残余速度一致。分析结论可为坦克、舰船等单、多层金属装甲防护结构设计与计算提供参考和依据。

Aiming at the failure mode of ductile hole expansion, the applicable scopes of projectile nose shape and plate thickness of six theoretical models （F-W, C-L, JZG, WHM, S-W, JBL ） for a rigid sharp-nosed projectile perforating a ductile metallic plate were discussed. The criterion of choosing parameters in each model was unified. In addition, the applicable scopes of half apex angle and CRH for sharp conical and ogive projectiles of JZG model were proposed, respectively. Based on 12 perforation tests with impact velocities of 200 ~1600 m/s and dimensionless plate thicknesses （ the ratio of plate thickness and projectile diameter） of O. 605 -9.17, it was conduded that for the prediction of residual velocity of conical projectiles after perforating the plate, S-W and WHM, JZG, F-W models are better for thin, medium and thick plate thicknesses, respectively; for ogive projectiles, WHM and JBL models are better; meanwhile, the conclusions for the prediction of ballistic limit velocity are consistent with those for the prediction of residual velocity. The above conclusions provided a reference for design and calculation of single and multi-layered metallic armor protective structures of tanks and ships.