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Phase field modeling of ductile fracture at large plastic strains using adaptive isotropic remeshing

Abstract : In this paper, a phase field model of ductile fracture is described within the framework of large plastic strains. Most results dealing with phase field modeling of ductile fracture are carried out on a fixed mesh, which requires a fine mesh throughout all the computation. The aim of this paper is to introduce an adaptive isotropic remeshing strategy coupled with a phase field model of ductile fracture to achieve accurate results with a major decrease in computational time. A mixed velocity/pressure finite element formulation is used for the solution of mechanical fields. The plastic strain field needs to be transferred to the new mesh after each remeshing operation. This field transfer requires the use of a suitable remeshing-transfer operator. Different field transfer operators are tested and results are reported. In order to reduce the numerical diffusion associated with the field transfer operation, a volume quality based metric has been introduced. This paper presents different numerical examples with both qualitative and quantitative analyses in order to show the ability of the developed strategy in predicting crack evolution in ductile materials. The proposed framework is also able to predict crack paths in highly ductile materials while benefiting from space-adaptivity.
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Submitted on : Friday, March 11, 2022 - 10:08:09 AM
Last modification on : Monday, July 18, 2022 - 1:24:40 PM

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Hazem Eldahshan, Pierre-Olivier Bouchard, José Alves, Etienne Perchat, Daniel Pino Muñoz. Phase field modeling of ductile fracture at large plastic strains using adaptive isotropic remeshing. Computational Mechanics, Springer Verlag, 2021, 67 (3), pp.763-783. ⟨10.1007/s00466-020-01962-7⟩. ⟨hal-03472563⟩

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