Buckling strength of longitudinally stiffened orthotropic rectangular plate under in-plane compressive forces

Abstract

In this paper an analytical solution applicable to the buckling analysis of longitudinally stiffened orthotropic plate subjected to the in-plane linearly distributed loads is developed. All edges of plate are assumed to be simply supported and the stiffener is modeled as a beam element. Considering the torsional rigidity of stiffener the buckling equation is derived by using Rayleigh-Ritz method. The upper limit of the buckling coefficient of plate is also estimated by using Lagrangian multiplier method. The results of buckling analysis are given in a graphical form, and they are compared with conventional ones which were obtained by considering only the flexural rigidity of stiffener.