04.2 - Aerostructures Design, Structural Dynamics, AeroelasticityWIND TUNNEL EXPERIMENT WITH AN EPP-WING TO INVESTIGATE AEROELASTIC EFFECTS OF NONLINEAR ELASTIC STIFFNESSESK. Bramsiepe¹, M. Braune¹, W. Krüger¹, L. Tichy¹; ¹DLR - Institute of Aeroelasticity, Germany The idea of this concept is to modify the linear properties of wing structures to influence the lift distribution for load alleviation. rnThis work demonstrates the nonlinear elastic characteristics of a wing composed of foam material (EPP) in a wind tunnel test campaign. The degressive nonlinear elastic stiffness reduces the root bending moment of the wing.rn |