EVP2D- a computer code developed for the eslastoviscoplastic-damage analysis of axyssimetrical and two-dimensional problems

This work aims to describe the computer code EVP2D developed for the elastoviscoplastic-damage analysis of mettalic components, with particular emphasis dedicated to the problem of creep damage and rupture. After a brief introduction of the basic concepts and procedures of Continuum Damage Mechanics, the constitutive equations implemented are presented. Next, the finite element approximation proposed for solution of the initial boundary value problem of interest is discussed, particularly the numerical algorithms used for time integration of the creep strain rate and damage rate equations, and the numerical procedures adopted for dealing with the presense of partially or fully ruptured finite elements in the mesh. As a pratical application, the rupture behaviour of a biaxially tension loaded plate containing a central circular hole is examined. Finally, future developments of the code, which include as prioritiesthe treatment of ciyclic loads and the description of the anisotropic feature of creep damage evolution, are briefly introduced. (author)