Finite Element Analysis of Time-Dependent Inelastic Deformation in the Presence of Transient Thermal Stresses

摘要

A finite element formulation for the solution of time-dependent inelastic deformation problems for metallic structures, in the presence of transient thermal stresses, is presented. A rate formulation of the equations is used and any of a number of recently proposed combined creep-plasticity constitutive models with state variables can be adopted to describe material behavior. The computer program developed can solve planar (plane strain and stress) and axisymmetric problems. Using one of the above mentioned constitutive models, numerical results are presented for several illustrative problems, and comparisons of results, using either the quasi-steady or the unsteady diffusion equation for the determination of the temperature field, are carried out. (ERA citation 05:038510)