Validation of Finite Element Approaches for Modelling Creep Continuum Damage Mechanics

摘要

FE creep and damage calculations are performed for a number of simple geometry models which are used to represent uniaxial, bi-axial, tri-axial and multi-material creep behaviours, using a user-subroutine CREEP within ABAQUS. A one damage variable, Kachanov-type creep damage constitutive equation is included into CREEP. The results obtained are compared to the corresponding results obtained using the user-subroutine UMAT with the same type of constitutive equations. For all of the cases considered, the results are in very good agreement, confirming the validity of using the CREEP subroutine in continuum damage analyses as an alternative and potentially faster facility for practical application.