title: Phase-field modelling of ductile fracture: a variational gradient-extended plasticity-damage theory and its micromorphic regularization.
abstract: This work outlines a novel variational-based theory for the phase-field modelling of ductile fracture in elastic-plastic solids undergoing large strains. The phase-field approach regularizes sharp crack surfaces within a pure continuum setting by a specific gradient damage modelling. It is linked to a formulation of gradient plasticity at finite strains. The framework includes two independent length scales which regularize both the plastic response as well as the crack discontinuities. This ensures that the damage zones of ductile fracture are inside of plastic zones, and guarantees on the computational side a mesh objectivity in post-critical ranges.
authors.affiliation: Institute of Applied Mechanics, University of Stuttgart, Pfaffenwaldring 7, 70569 Stuttgart, Germany cm@mechbau.uni-stuttgart.de.
authors.forename: C
authors.identifier: http://orcid.org/0000-0002-4099-0948
authors.initials: C
authors.lastname: Miehe
authors.affiliation: Institute of Applied Mechanics, University of Stuttgart, Pfaffenwaldring 7, 70569 Stuttgart, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Teichtmeister
authors.affiliation: Institute of Applied Mechanics, University of Stuttgart, Pfaffenwaldring 7, 70569 Stuttgart, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Aldakheel
keywords: ductile fracture; gradient damage mechanics; phase-field modelling; size effects; strain gradient plasticity; variational principles