Nonlinear mechanical, thermal and thermo-mechanical postbuckling of imperfect eccentrically stiffened thin FGM cylindrical panels on elastic foundations

摘要: Abstract This paper presents an analytical approach to investigate the nonlinear stability analysis of eccentrically stiffened thin FGM cylindrical panels on elastic foundations subjected mechanical loads, thermal loads and combination these loads. The material properties are assumed be temperature-dependent graded in thickness direction according a simple power law distribution. Governing equations derived basing classical shell theory incorporating von Karman–Donnell type nonlinearity, initial geometrical imperfection, Lekhnitsky smeared stiffeners technique Pasternak foundations. Explicit relations load–deflection curves for determined by applying stress function Galerkin method. effects properties, buckling postbuckling discussed detail. obtained results validated comparing with those literature..