Effect of material properties on nonlinear static aeroelastic properties of high-aspect-ratio wings

LEI Shuai1, WANG Jun-li1, LI Tuo-lei1, LI Qing-qing1, LU Zheng-wu1, FENG Bo-lin2
(1.Mechanical Engineering College, Shaanxi University of Technology, Hanzhong 723000, China;
2.Northwest Institute of Mechanical & Electrical Engineering, Xianyang 712099, China)

Abstract: Aiming at the problem of nonlinear static aeroelasticity of composite wings with high-aspect-ratio, the CFD / CSD bidirectional loose fluid-solid coupling calculation method was used to research the nonlinear static aeroelastic properties of composite wings and aluminum alloy wings with the same thickness. The aerodynamic load was solved by Navier-Stokes (N-S) governing equation, and the nonlinear structural motion equation was solved. The structure characteristics, longitudinal aerodynamic characteristics and stability of the composite wing at different angles of attack were compared with the same thickness aluminum alloy wing. The results indicate that the composite wing is significantly lighter than the aluminum alloy wing, reaching 25.95%. The elastic deformation of the composite wing in the lift direction is greater than that of the aluminum alloy wing, which has an increase of about 29.6%. Comparing with the aluminum alloy wing, the stiffness of the composite wing is reduced.

Key words: high-aspect-ratio wing; composite material; structural characteristics; longitudinal aerodynamic characteristics and stability