为了对含紧固件复合材料层压板的雷击烧蚀损伤特征进行分析，根据雷击过程中的能量平衡关系，建立了含紧固件复合材料层压板结构雷击烧蚀损伤数学分析模型。基于该分析模型，在 ABAQUS中建立了含紧固件复合材料层压板结构雷击烧蚀损伤分析三维有限元模型，并对不同电势边界条件下的雷击烧蚀损伤进行了分析。分析结果表明：由于金属紧固件的存在，雷电流可以通过紧固件沿层压板结构厚度方向传导，然后在各铺层内进行电流分配，各方向铺层传导雷电流的能力与该层电势梯度方向和电势梯度方向的电导率有关；在不同的电势边界条件下，各层的电势分布有所差异，从而导致了各铺层传导雷电流能力的不同，最终引起不同的雷击烧蚀损伤分布。通过本文的研究，能够对含紧固件复合材料层压板结构的雷击烧蚀损伤特征有定性的认识。
In order to analyze the damage characteristics of mechanical fastened composite laminates subj ected to lightning strike,mathematical analysis model of the ablation damage of composite laminate structure with fastener was constructed based on the principle of energy balance.According to the model,an effective three dimensional thermal-electrical coupling analysis finite element model of composite laminate structure with fastener subj ected to lightning current has been established based on ABAQUS,and lightning strike ablation damage under different po-tential boundary conditions was analyzed.Analysis results indicate that:lightning current could pass through the thickness direction of the laminate due to the existence of the metal fastener,then distribute to all layers,and finally conducted in in-plane of layer,conductive ability of different layup orientations was dependent on the potential gradi-ent direction and electrical conductivity along the potential gradient direction;different potential boundary conditions was corresponding to different potential distribution in layers,resulting in conductive ability of different layup orien-tations was changed,and then caused different lightning strike ablation damage distribution.According to the inves-tigation in this paper,the lightning strike ablation damage characteristic of composite laminate with fastener can be qualitatively recognized.
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