Elasto-plastic collapse load analysis of single mitred bends

Abstract

As a primary aim of this study, solution procedures have been developed for nonlinear analysis of Single Mitred Bends. An analysis of single mitred bends made of anisotropic material typical of metal matrix has also been considered. An assumed displacement finite element approach, based on the degenerate shell concept that incorporates bending-extensional coupling and some measure of transverse shear deformation is adopted. Attention has been devoted to achieving a computationally efficient mesh and an accurate numerical integration across the thickness of the single mitred bend.

A special purpose computer PLAMBS7 has been developed. A number of problems have been analyzed and results compared with solutions elsewhere in the literature. The range of problems included elastic, elasto-plastic, and elasto-anisotropic single mitred bends under pressure or in-plane bending. For the bending load, he effect of large deformation in relation to opening and closing moments on the elastoplastic response of the mitre model has been explored.