关键词: 混杂纤维复合材料, 铺层设计, 大展弦比机翼, 结构特性, 屈曲

Abstract: The application of carbon/glass hybrid fiber composites significantly enhances the design flexibility of wings. When meeting the strength requirements, incorporating a certain proportion of glass fibers into the matrix can effectively improve the thermal stability, insulation, and dielectric properties of the wings. Using the finite element software Nastran, we investigated the structural characteristics of high aspect ratio wings made from hybrid fiber composites. The study discusses the effects of different hybridization methods and ratios on the modal characteristics, maximum deformation, stress, strain, and buckling properties of the high aspect ratio wings. The results show that both the hybridization method and ratio significantly affect the structural characteristics of the high aspect ratio wings. As the volume fraction of carbon fiber plies increases, the structural performance of the wings improves. Buckling tends to occur in the skin near the trailing edge at the wing root. Optimizing the ply design of the main load-bearing spar or only the regions prone to buckling can increase the critical buckling load of the wing. However, optimizing the ply design of the spar significantly enhances the overall load-bearing capacity of the wing and reduces the maximum deformation.

Key words: hybrid fiber composite, layer design, high aspect ratio wing, structural characteristics, buckling