Elastoplastic Buckling Analysis of Plates Involving Free Edges By Deformation Theory of Plasticity

In this paper, elastoplastic buckling of rectangular plates with different boundary conditions is investigated. differential governing equations of plate are obtained on the basis of general loading and according to deformation theory (dt) of plasticity. various loading conditions such as uniaxial, biaxial and shear are studied. the employed material is al7075t6 which is usually used in the aerospace industry. a wide range of aspect ratios and plate thicknesses are investigated. the generalized differential quadrature method (gdq) is used as the numerical method to analysis the problem. the obtained results using deformation theory of plasticity are in good agreement with experimental data. an extensive parametric study for the effects of different aspects ratios, loading ratios, transverse shear deformations, thickness ratios and various boundary conditions on the buckling coefficient are presented.