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Phase field fracture model for viscoplastic materials in large deformations
Kabore, Brice Wendlassida; Loew, Pascal Juergen; Peters, Bernhard
2019Conference on Computational Modeling of Fracture and Failure of Materials and Structures (CFRAC 2019)
 

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Keywords :
Phase-field fracture; viscoplasticity; large deformations
Abstract :
[en] Phase-field modeling approach to material fracture and damage has received a growing interest among researchers. It has proven to be an effective way to address crack related discontinuities in continuum mechanics. Also, it solves the problem related to tracking the fracture surface by simply representing the fracture phase with a continuous field variable. Recently, phase-field fracture models have been extended to finite deformations, crack nucleation and applied to complex material behaviors such as plasticity and viscoplasticity. In this contribution we describe a viscoplastic model coupled with a phase-field dynamic fracture model in a large strain formulation. The model include damage, history, rate and temperature dependent behavior. A finite element implementation is presented in a staggered time integration. Moreover, we address the crack closure and crack surfaces interpenetration taking into account tension-compression strength asymmetry. Performance of the model on dynamic crack propagation are presented.
Disciplines :
Materials science & engineering
Author, co-author :
Kabore, Brice Wendlassida ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Loew, Pascal Juergen ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC)
Peters, Bernhard ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
External co-authors :
no
Language :
English
Title :
Phase field fracture model for viscoplastic materials in large deformations
Publication date :
13 June 2019
Event name :
Conference on Computational Modeling of Fracture and Failure of Materials and Structures (CFRAC 2019)
Event date :
12-06-2019 to 14-06-2019
Focus Area :
Computational Sciences
Available on ORBilu :
since 25 June 2019

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