Numerical Study On Multi Layered Target Material Subjected To Impact Loading

Abstract In this study, the glass/epoxy composite laminate is layered with polyurethane foam/ polyurethane sheet and silicon carbide to analyse their response during high mass and low velocity impact. The silicon carbide is layered in two forms, one is as plate and the other is as inserts. The target materials are prepared in various combinations and the bonding of layers is done by using epoxy. Effectiveness of silicon carbide inserts and plates are compared in terms of their energy absorbing capacities. The numerical simulation is also carried for the target material with the same experimental conditions. The experimental results are compared with the numerical results for validation and a reasonably good agreement is found. Further, the validated numerical model is extended to understand the ballistic performance of the target material. It is observed that the introduction of silicon carbide as front layer improves both the structural and ballistic performance. Also, the damage in case of samples with silicon carbide inserts is localized as opposed to that of silicon carbide plate.

摘要：本研究以玻璃/环氧树脂复合层合板为基体，分别搭配聚氨酯泡沫/聚氨酯片材与碳化硅（silicon carbide）进行层合构造，以分析其在高质量、低速冲击载荷下的力学响应。碳化硅在层合结构中采用两种布置形式：一为完整板材形式，二为嵌件形式。通过环氧树脂实现各层之间的粘接固化，制备得到多种组合构型的靶材试样。以吸能能力为评价指标，对比碳化硅嵌件与碳化硅板材的防护效能。同时，在与实验一致的工况下，针对该靶材体系开展了数值模拟研究。将实验结果与数值模拟结果进行对比以验证模型可靠性，二者呈现出良好的吻合度。进一步将验证后的数值模型推广应用，以探究该靶材的弹道防护性能。研究表明，将碳化硅作为表层引入层合结构，可同时提升靶材的结构性能与弹道防护性能。此外，相较于采用碳化硅板材的试样，采用碳化硅嵌件的试样其损伤区域更为局限集中。