Experiments and numerical simulations of low-velocity impact of sandwich composite panels

Zhang Taotao; Yan Ying; Li Jianfeng

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Experiments and numerical simulations of low-velocity impact of sandwich composite panels

机译：夹芯复合板低速冲击试验与数值模拟

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This article investigates the response of composite sandwich panel with Nomex honeycomb core subjected to low-velocity impact and compression after impact (CAI) by using the methods of experiments and numerical simulations. Low-velocity impact of sandwich panels at five energy levels is carried out to research the damage resistance and tolerance. A failure model based on Hashin failure criterion is implemented to model the intralaminar damage behavior of laminated plies in the numerical simulation. The cohesive zone model is used to simulate the delamination damage between adjacent laminated plies. The honeycomb core behavior is defined as an elastic-plastic material. Good agreements, in terms of contact-force histories, damage shapes, and indentation depths of the sandwich panels, are observed between the experimental and numerical results. During CAI analysis, the damaged panels present a phenomenon of quick crack propagation from impact indentation location to each unloaded side after the structural strength reached. It is found that the in-plane compressive strength of damaged sandwich panels is almost 25-35 reduction than that of undamaged panels. POLYM. COMPOS., 38:646-656, 2017. (c) 2015 Society of Plastics Engineers

机译：本文采用实验和数值模拟的方法，研究了Nomex蜂窝芯复合夹芯板在低速冲击和冲击后压缩（CAI）作用下的响应。对夹芯板在5个能级的低速冲击进行了研究，研究了夹芯板的抗损伤性和耐受性。采用基于Hashin失效准则的失效模型，对数值模拟中叠层层内损伤行为进行建模。内聚区模型用于模拟相邻层合层之间的分层损伤。蜂窝芯行为被定义为弹性塑性材料。实验结果和数值结果在夹芯板的接触力历史、损伤形状和压痕深度方面具有良好的一致性。在CAI分析过程中，损伤板在达到结构强度后，从冲击压痕位置向每个空载侧快速传播裂纹的现象。研究发现，受损夹芯板的面内抗压强度比未损坏的夹芯板低近25-35%。波利姆。作曲， 38：646-656， 2017.（c） 2015 年塑料工程师学会

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《Polymer Composites》 |2017年第4期|646-656|共11页
作者
Zhang Taotao; Yan Ying; Li Jianfeng;
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Beijing Univ Aeronaut & Astronaut, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China;

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正文语种英语
中图分类增强塑料、填充塑料;
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Experiments and numerical simulations of low-velocity impact of sandwich composite panels

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