Phase-field modeling of porous-ductile fracture in non-linear thermo-elasto-plastic solids

authored by: M. Dittmann, F. Aldakheel, J. Schulte, F. Schmidt, M. Krüger, P. Wriggers, C. Hesch
Abstract: Phase-field methods to regularize sharp interfaces represent a well established technique nowadays. In fracture mechanics, recent works have shown the capability of the method for brittle as well as ductile problems formulated within the fully non-linear regime. In this contribution, we introduce a framework to simulate porous-ductile fracture in isotropic thermo-elasto-plastic solids undergoing large deformations. Therefore, a modified Gurson–Tvergaard–Needleman GTN-type plasticity model is combined with a phase-field fracture approach to account for a temperature-dependent growth of voids on micro-scale followed by crack initiation and propagation on macro-scale. The multi-physical formulation is completed by the incorporation of an energy transfer into the thermal field such that the temperature distribution depends on the evolution of the plastic strain and the crack phase-field. Eventually, this physically comprehensive fracture formulation is validated by experimental data.
Organisation(s): Institute of Continuum Mechanics
External Organisation(s): University of Siegen
Type: Article
Journal: Computer Methods in Applied Mechanics and Engineering
Volume: 361
ISSN: 0045-7825
Publication date: 01.04.2020
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Computational Mechanics, Mechanics of Materials, Mechanical Engineering, Physics and Astronomy(all), Computer Science Applications
Electronic version(s): https://doi.org/10.1016/j.cma.2019.112730 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{1646e864a8684d7ba3ba0312a0208fb9,
title = "Phase-field modeling of porous-ductile fracture in non-linear thermo-elasto-plastic solids",
abstract = "Phase-field methods to regularize sharp interfaces represent a well established technique nowadays. In fracture mechanics, recent works have shown the capability of the method for brittle as well as ductile problems formulated within the fully non-linear regime. In this contribution, we introduce a framework to simulate porous-ductile fracture in isotropic thermo-elasto-plastic solids undergoing large deformations. Therefore, a modified Gurson–Tvergaard–Needleman GTN-type plasticity model is combined with a phase-field fracture approach to account for a temperature-dependent growth of voids on micro-scale followed by crack initiation and propagation on macro-scale. The multi-physical formulation is completed by the incorporation of an energy transfer into the thermal field such that the temperature distribution depends on the evolution of the plastic strain and the crack phase-field. Eventually, this physically comprehensive fracture formulation is validated by experimental data.",
keywords = "Ductile fracture, GTN model, Isogeometric analysis, Phase-field approach, Thermomechanics",
author = "M. Dittmann and F. Aldakheel and J. Schulte and F. Schmidt and M. Kr{\"u}ger and P. Wriggers and C. Hesch",
note = "Funding information: Support for the present research was provided by the Deutsche Forschungsgemeinschaft (DFG), Germany under grant HE5943/8-1 and DI2306/1-1 . The authors C. Hesch and M. Dittmann gratefully acknowledge this support. The authors P. Wriggers and F. Aldakheel thank the DFG for their financial support of the Collaborative Research Centre 1153. Appendix",
year = "2020",
month = apr,
day = "1",
doi = "10.1016/j.cma.2019.112730",
language = "English",
volume = "361",
journal = "Computer Methods in Applied Mechanics and Engineering",
issn = "0045-7825",
publisher = "Elsevier",
}