Buckling, postbuckling, and crippling of shallow-curved composite plates with edge stiffeners

Abstract

Stress-energy density A theoreticai/anal ytical capability for prediction of buckling, p ostbuckling, and crippling ,af metal and composite shallow curved plates is presented. The theoretical model accounts for both geometric and material nonlinearities. The composite material formulation is valid fgr anisstropic lamina with the nonlinear behavior described by Ramberg-Osgood inplane and matrix stress-strain relations. Transverse shear effects are 4153 included. Correlations with available metai and composite experimental data confirm the accuracy qf the p resent approach. Stress-energy density of the th lamina as a function of inplane stresses in material coordinates Stress-energy denstiy of kth layer of matrix m aterial Inplane shear moduius relative ts material axes coordinates Yatrix material shear modulus and stiffener average shear modulus, respectively Yomenclature Laminate thickness