Finite element analysis for large axisymmetric deformations of plastic and viscoplastic materials with plastic spin

Abstract

The objective of this work is to study the rate-independent or ratedependent constitutive modelling with plastic spin for large axisymmetric deformations by finite element analysis. The constitutive equations under consideration are based on the internal time theory for rate-independent model and the Chaboche model for rate-dependent model wherein the concept of plastic spin is incorporated. A finite element code is written for analysis of large axisymmetric deformation with nonzero torsion possible. The effect of plastic spin upon the response of materials is examined for a combined isotropickinematic hardening model as well as purely kinematic hardening model using this FEM code under large torsional or uniaxial deformations.