Composites Part B: Engineering ( IF 13.1 ) Pub Date : 2021-05-24 , DOI: 10.1016/j.compositesb.2021.109023 Zhong-Nan Zhao , Bin Han , Rui Zhang , Qi Zhang , Qian-Cheng Zhang , Chang-Ye Ni , Tian Jian Lu
The ballistic performance of a bi-layer armor encapsulated with ultra-high molecular weight polyethylene (UHMWPE) composite laminate was investigated using a combined experimental and numerical approach. Three series of test specimens were examined: (A) bare and encapsulated aluminum (Al) plates, (B) bare and encapsulated bi-layer mosaic armors, and (C) bi-layer mosaic armors having identical areal density but different encapsulation thicknesses. The ballistic behaviors and failure mechanisms of UHMWPE encapsulated Al plates and bi-layer mosaic armors under different projectile impact velocities were analyzed systematically. Attributed to the integration effect of encapsulation, the encapsulated specimens could effectively disperse localized projectile impacting to the entire structure. The results indicated that the UHMWPE encapsulation could enhance significantly the ballistic resistance of traditional ceramic/metal bi-layer armors, due mainly to serious pulling and stretching deformations of the lateral and rear UHMWPE laminates in resisting the projectile impact. However, thicker encapsulation would not necessarily lead to better ballistic performance for specimens with equal areal density. Further, the thickness (or mass) ratio of the armor substructures needed to be tailored synthetically to achieve optimal ballistic performance.
中文翻译:
UHMWPE 封装对双层马赛克装甲弹道性能的增强
使用组合实验和数值方法研究了用超高分子量聚乙烯 (UHMWPE) 复合层压板封装的双层装甲的弹道性能。检查了三个系列的试样:(A) 裸露和封装的铝 (Al) 板,(B) 裸露和封装的双层马赛克装甲,以及 (C) 具有相同面密度但封装厚度不同的双层马赛克装甲。系统分析了UHMWPE封装的铝板和双层马赛克装甲在不同弹丸冲击速度下的弹道行为和失效机制。由于封装的集成效应,封装的样本可以有效地分散撞击整个结构的局部弹丸。结果表明,UHMWPE 封装可以显着提高传统陶瓷/金属双层装甲的防弹能力,这主要是由于 UHMWPE 层压板在抵抗弹丸冲击方面的横向和后部拉伸变形严重。然而,对于具有相同面密度的样本,更厚的封装不一定会导致更好的防弹性能。此外,装甲子结构的厚度(或质量)比需要综合调整以实现最佳弹道性能。对于具有相同面密度的样品,更厚的封装不一定会导致更好的防弹性能。此外,装甲子结构的厚度(或质量)比需要综合调整以实现最佳弹道性能。对于具有相同面密度的样品,更厚的封装不一定会导致更好的防弹性能。此外,装甲子结构的厚度(或质量)比需要综合调整以实现最佳弹道性能。