Abstract：Morphing aircraft change the wing shape according to different flight conditions to obtain the best aerodynamic performance, thus improving the ability to execute multi-objective missions under multiple working conditions. The flexible skin of surface structure is one of the key technologies to realize morphing structure, so flexible skin structure is not only designed to have enough sufficient synergistic deformation ability but also can withstand aerodynamic loads on the surface and maintain smooth aerodynamic shape. To meet the needs, this paper proposes a sandwich flexible skin structure with large deformation based on Ω-shaped honeycomb (Ω-shaped flexible skin). The topological structure of Ω configuration is determined by using parameter optimization techniques to minimize the stiffness of configuration deformation direction; the in-plane equivalent elastic performance prediction formula of Ω-shaped flexible skin honeycomb structure is derived, while the in-plane deformation performance and out-of-plane bearing capacity of the structure are analyzed by numerical simulation. By comparing with in-plane deformation capacity of two sandwich flexible skin structure, namely serpentine-shaped honeycomb and sine-cosine-shaped honeycomb verifies this flexible skin good performance. The results show that the proposed Ω-shaped flexible skin honeycomb structure has good in-plane recoverable large deformation ability and out-of-plane bearing ability.
2022, Vol. 43 
