The present study reports the response of composite laminates under high velocity impact by fragments. A numerical model is developed to simulate a hostile scenario of impact of fragments after their interaction with a blast wave to study the response of cross ply laminates. The composite laminates are modelled using a progressive damage model having a string of failure criteria and damage variables. The damage model is based on a combined elastic–plastic response which was found to have good agreement with existing experimental and numerical results. The CONWEP blast wave model is used to interact with a stacked set of fragments which then goes on to collide with the laminate. The 12-ply laminate is kept at various standoff distances as well as angles for different cases to study the collective and individual effect of fragment impact. The performance of laminates is discussed based on different combinations of standoff distances and angles for deformable AA7075 and rigid Steel projectiles.

本研究报告了复合材料层压板在高速撞击下碎片的响应。建立了一个数值模型来模拟碎片与爆炸波相互作用后的不利影响，以研究交叉层压板的响应。使用具有一系列破坏准则和破坏变量的渐进式破坏模型对复合材料层压板进行建模。损伤模型基于组合的弹塑性响应，发现该模型与现有的实验和数值结果具有很好的一致性。CONWEP爆炸波模型用于与堆叠的片段集进行交互，然后继续与层压板碰撞。12层层压板在不同情况下保持不同的间距和角度，以研究碎片撞击的集体和个体影响。