含金属簇绒结构CFRP层合板雷击烧蚀防护性能模拟

Simulation on lightning erosion protection performance of CFRP laminates with metal cluster structure

簇绒技术具有灵活性高、经济性高等优点,研究发现金属簇绒结构能显著改善碳纤维复合材料的机械性能和电气性能。为探究含新型雷击防护金属簇绒结构CFRP(carbon fiber reinforced polymer)层合板在雷击过程中损伤特性,建立不同结构参数下含金属簇绒结构CFRP层合板电-热耦合模型,通过与实验结果对比分析发现,仿真模型的损伤样貌、损伤区域及损伤扩展趋势与实验相吻合,证明了模型的有效性。研究结果表明:含金属簇绒结构CFRP层合板的烧蚀表面积降低至基准件的8.06%;金属丝间距对高电势区域面积和区域形状有影响,金属丝间距对雷击烧蚀面积影响最大。

The tufting technology has the advantages of high flexibility and high economy.Research has found that metal tufting structures can significantly improve the mechanical and electrical properties of carbon fiber composites,and have great prospects in engineering applications.In order to investigate the damage characteristics of carbon fiber CFRP laminates with metal tufted structures during lightning strikes and the influence of structural parameters on lightning protection effectiveness,an electric thermal coupling model of CFRP laminates with metal tufted structures was established.Comparing the simulation and experimental results under the same load condition,it was found that the two were consistent in terms of damage appearance,damage area,and damage propagation trend,proving the effectiveness of the model.The transverse heat transfer process and current conduction path of CFRP laminates with metal cluster structure were discussed.The research results indicate that the ablation surface area of CFRP laminates with metal tufted structures is reduced to 8.06%of the reference component.Wire spacing had an effect on the area and shape of the area of the high potential region,and the wire spacing had the greatest impact on the ablation area of lightning strikes.