Analysis of lightning ablation damage of composite laminates containing fasteners based on thermoelectric coupling model

Abstract

In order to analyze the ablation damage law of composite laminates with fasteners subjected to the action of lightning current, the lightning finite element analysis model of fastener-containing laminates was constructed based on the principle of thermoelectric coupling, and the results of lightning ablation damage were analyzed and tested. The results compare the validity of the model. The ablation damage of fastener-containing laminates under different ratios of electrical conductivity, specific heat and thermal conductivity was analyzed. The variation of ablation damage area under different factors was summarized. The results show that the lightning ablation damage of the fastener-containing laminates compared with the fastener-free laminates is more threatening to the safety of civil aircraft. In addition, the electrical conductivity and specific heat of the laminate have a greater impact on the ablation area of the fastener-containing composite laminate. When the two factors are reduced, the ablation damage area will increase to a certain extent， while the thermal conductivity of laminates and fastener properties have little effect on the ablation damage area.

Keywords

• lightning strike
• composite laminate
• fastener
• ablation damage