Research on Optimum Design of Composite Plate Wings for Aeroelastic Characteristics Using Lamination Parameters (The First Report)-flutter and Divergence Characteristics of Composite Plate Wings-

The present paper treats the flutter and divergence characteristics of composite plate wings with various sweep angles. In the first report of this paper, the effect of laminate configuration on the flutter and divergence characteristics is investigated for composite plate wings. Aeroelastic analysis of composite plates is based on the finite element method and the subsonic unsteady lifting surface theory. To examine the effect of laminate configuration, the flutter and divergence characteristics are represented on the lamination parameter plane, instead of using the composite fiber angle or the non-dimensional cross-coupling parameter. The representation gives a comprehensive explanation of the effects of principal-axis stiffness and bending-torsional coupling on the flutter and divergence characteristics.