On the implementation of finite deformation gradient-enhanced damage models

Research output: Contribution to journalArticle

Abstract

We introduce a comprehensive framework for the efficient implementation of finite deformation gradient-regularised damage formulations in existing finite element codes. The numerical implementation is established within a thermo-mechanically fully coupled finite element formulation, where the heat equation solution capabilities are utilised for the damage regularisation. The variationally consistent, gradient-extended and geometrically non-linear damage formulation is based on an overall free energy function, where the standard local free energy contribution is additively extended by two non-local terms. The first additional term basically contains the referential gradient of the non-local damage variable. Secondly, a penalty term is added to couple the local damage variable—the evolution of which is governed by an ordinary differential equation—and the non-local damage field variable that is governed by an additional balance equation of elliptic type.

Details

Authors
Organisations
External organisations
  • Technical University of Dortmund
  • University of Bremen
  • Stanford University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Computational Mathematics

Keywords

  • Abaqus, Finite element implementation, Gradient-enhanced damage, Heat equation
Original languageEnglish
JournalComputational Mechanics
Publication statusE-pub ahead of print - 2019
Publication categoryResearch
Peer-reviewedYes