Composite materials have been widely used in civil aviation aircraft, but due to low electrical conductivity and thermal conductivity, a wide range of ablation damage occurs after lightning strikes, threatening the operation safety of civil aviation passenger aircraft. In order to make composite materials more safely used in civil aviation aircraft, the lightning strike protection characteristics of commonly used curved composite materials in civil aircraft were studied, an electrothermal coupled finite element model of lightning strike damage of curved composite materials was established, and the influence of different factors on the lightning strike damage performance of curved laminates was studied. It was found that the ablation area of the bent laminate was increased by 1.51 times under the action of the peak lightning current of 50 kA due to the influence of thermal conductivity, and the depth expanded to the sixth layer, and the minimum layer was The damage area increased by 10.67 times; in addition, the peak value of the lightning strike current and the bending angle have a greater impact on the lightning strike damage results, while the aspect ratio, the direction of fiber layup, and the thickness are more affected by the potential and thermal conductivity of the bent laminate. It is quite different from the influence characteristics of lightning strike factors of uncurved laminates.
单泽众,杨霄,马凯,等. 弯曲复合材料层合板雷击损伤影响分析[J]. 科学技术与工程, 2023, 23(30): 13179-13186.
Shan Zezhong, Yang Xiao, Ma Kai, et al. Effects on Lightning Damage of Bending Composite Laminates based on Electrothermal Coupled Finite Element Analysis Model[J]. Science Technology and Engineering,2023,23(30):13179-13186.