PC基防弹玻璃受冲击时力学行为数值模拟

Numerical Simulation of Mechanical Behavior of PC-based Bullet-proof Glass under Impact

防弹玻璃是重要的军民共用透明窗口材料,兼具多种特殊功能和结构承载力。提出一种由无机玻璃、聚甲基丙烯酸甲酯(PMMA)和聚碳酸酯(PC)三种材料根据不同组合热压而成的防弹玻璃模型,以提高防弹玻璃的抗冲击性并实现材料的轻量化。利用ABAQUS软件,采用数值模拟的方法,分析了该防弹玻璃受冲击过程中的应力应变行为。模拟结果表明,在相同厚度时,层数愈多应力分布愈集中,变形的范围越小;材料的抗冲击性与厚度成正比。在优化条件下模拟该新型结构防弹玻璃的结果表明,14 mm厚度可抵抗7.62 mm弹头600 m/s速度的正面冲击。

Bullet-proof glass is a kind of transparent window material utilized for load-bearing and various specialized functions in both military and civil field.Based on the previous studies,a new composite structure composed of inorganic glass,PMMA and PC materials with different combinations was proposed with the aim of improved impact resistance and lightened material weight.Using ABAQUS software,the mechanical properties of the designed bullet-proof glass during impact process were investigated by numerical simulation.The results showed that for the same thickness,the more the layers were,the more concentrated the stress distribution was,and that the impact resistance of the material was proportional to the thickness.Under optimized configuration,the 14mm thick bullet-proof glass was able to withstand the frontal impact of a 7.62 mm warhead at a speed of 600 m/s.