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- Title
On the implementation of finite deformation gradient-enhanced damage models.
- Authors
Ostwald, Richard; Kuhl, Ellen; Menzel, Andreas
- 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.
- Subjects
ORDINARY differential equations; DAMAGE models
- Publication
Computational Mechanics, 2019, Vol 64, Issue 3, p847
- ISSN
0178-7675
- Publication type
Article
- DOI
10.1007/s00466-019-01684-5