采用试验和数值的方法对30层芳纶织物复合材料的抗冲击性能进行了研究.首先对30层芳纶织物复合材料进行了子弹打靶冲击试验,得到芳纶复合材料在子弹冲击下的鼓包、穿透、纤维断裂等信息;其次,建立复合材料冲击有限元模型,并基于Hashin断裂准则模拟了织物在冲击载荷作用下的失效和断裂行为,采用Cohesive单元模拟材料的变形和层间开裂失效,得到了材料在冲击作用下的位移场、应变场、界面分层、纤维断裂以及子弹的冲击速度变化等信息.最后,对试验测量和有限元分析结果进行对比,分析了复合材料在冲击载荷作用下的能量吸收、能量耗散等抗冲击性能,为材料的工程应用提供参考.%Experimental and numerical method were employed to determine impact resistance of the 30 layer-aramid fabric compositeby. Firstly, the multi-layer fabric composite was fabricated and specimens were prepared according to the experiment requirement. Secondly, the bullet impact experiment was implemented to obtain mechanical performance of the composite, such as interface delaminate, fiber fracture. Thirdly, the FEM model was set up in Abaqus, and Hashin criterion and Cohesive element were adapted to simulate behavior of composite failure and interface delamination. The information of displacement, strain field, velocity of the bullet were obtained. Finally, FEM simulation result was compared with experi-ment result, ballistic performance of the composite under impact load was analyzed, which contributed to engineer applica-tion.
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