TY - JOUR

T1 - Phase-field modeling of porous-ductile fracture in non-linear thermo-elasto-plastic solids

AU - Dittmann, M.

AU - Aldakheel, F.

AU - Schulte, J.

AU - Schmidt, F.

AU - Krüger, M.

AU - Wriggers, P.

AU - Hesch, C.

N1 - 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

PY - 2020/4/1

Y1 - 2020/4/1

N2 - 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.

AB - 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.

KW - Ductile fracture

KW - GTN model

KW - Isogeometric analysis

KW - Phase-field approach

KW - Thermomechanics

UR - http://www.scopus.com/inward/record.url?scp=85075861360&partnerID=8YFLogxK

U2 - 10.1016/j.cma.2019.112730

DO - 10.1016/j.cma.2019.112730

M3 - Article

AN - SCOPUS:85075861360

VL - 361

JO - Computer Methods in Applied Mechanics and Engineering

JF - Computer Methods in Applied Mechanics and Engineering

SN - 0045-7825

M1 - 112730

ER -