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复合材料在飞机上的应用越来越广泛,与金属相比复合材料导电性较差,因此处于雷击区域的复合材料部件表面要设计导电防护层以承受雷击时的瞬间放电,避免复合材料部件的烧蚀损伤。本研究利用数值仿真的方法建立了数学模型,计算了复合材料表面导电层通过雷击电流脉冲后的电场和温度场分布,并对该导电层的雷击防护能力及可靠性进行了评价。模拟结果表明,厚度为0.20 mm的铝导电层最适宜做飞机表面的雷击防护层。
Composites are more and more widely used in aircrafts. Compared with metals, composites are less conductive. Therefore, the surface of composite parts in lightning strikes should be designed with conductive protective layer to withstand the instantaneous discharge when struck by lightning. Ablation damage. In this study, the numerical simulation method was used to establish the mathematical model. The electric and temperature distributions of the conductive layer on the composite surface after the lightning current pulse were calculated. The lightning protection capability and reliability of the conductive layer were also evaluated. The simulation results show that the aluminum conductive layer with a thickness of 0.20 mm is most suitable for the lightning protection layer on the aircraft surface.