Nonlinear response of imperfect eccentrically stiffened FGM cylindrical panels on elastic foundation subjected to mechanical loads

•The eccentrically stiffened FGM panels on elastic foundation is considered.•The Lekhnitsky smeared stiffeners technique and stress function are used.•The effects of elastic foundations and outside stiffeners are analyzed.•The obtained results are validated by comparing with those in the literature.

In the present paper, the nonlinear response of eccentrically stiffened FGM cylindrical panels on elastic foundation subjected to mechanical loads is presented. Material properties are graded in the thickness direction of the FGM panel according to a simple power law distribution. By applying Bubnov-Galerkin method, the Lekhnitsky smeared stiffeners technique with Pasternak type elastic foundation and stress function, explicit relations of load-deflection curves for simply supported eccentrically stiffened FGM panels are determined. Numerical results are given for evaluate effects of material and geometrical properties, elastic foundation and eccentrically outside stiffeners on the buckling and postbuckling of the FGM panels. The obtained results are validated by comparing with those in the literature.