Numerical Computation of Stresses, Strains and Displacements in the Thin Plates in Plastic Range
Editor: Marjanovic D.
Author: Pustaic, D.
Section: Analysis Technologies
An incremental formulation of the basic equations of the finite element method is described in this paper. These basic equations are used in stress and strain analysis in structures in which plastic strains have occurred. The elasto-plastic matrix was formed for the case of plane stress. The dependence between incremental stress vector and incremental elastic-plastic strain vector is established through the matrix . In order to illustrate a numerical procedure, a discretization of a plate quarter was performed on triangular finite elements and on isoparametric quadrilateral ones. The stress fields were computed in elastic-plastic range. The plastic zones spreading around discontinuities are also represented.