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Multi-phase-field modeling of anisotropic crack propagation for polycrystalline materials

Nguyen, Thanh-Tung ; Réthoré, Julien ; Yvonnet, Julien ; Baietto, Marie-Christine

Computational mechanics, 2017-08, Vol.60 (2), p.289-314 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
Multi-phase-field modeling of anisotropic crack propagation for polycrystalline materials
Autor: Nguyen, Thanh-Tung ; Réthoré, Julien ; Yvonnet, Julien ; Baietto, Marie-Christine
Assuntos: Alloys ; Analysis ; Anisotropy ; Classical and Continuum Physics ; Cleavage ; Cohesion ; Computational Science and Engineering ; Crack initiation ; Crack propagation ; Cracking (fracturing) ; Crystal structure ; Damage ; Elasticity ; Engineering ; Engineering Sciences ; Fracture mechanics ; Grain boundaries ; Mathematical models ; Mechanics ; Mechanics of materials ; Original Paper ; Polycrystals ; Theoretical and Applied Mechanics ; Three dimensional models ; Two dimensional models
É parte de: Computational mechanics, 2017-08, Vol.60 (2), p.289-314
Descrição: A new multi-phase-field method is developed for modeling the fracture of polycrystals at the microstructural level. Inter and transgranular cracking, as well as anisotropic effects of both elasticity and preferential cleavage directions within each randomly oriented crystal are taken into account. For this purpose, the proposed phase field formulation includes: (a) a smeared description of grain boundaries as cohesive zones avoiding defining an additional phase for grains; (b) an anisotropic phase field model; (c) a multi-phase field formulation where each preferential cleavage direction is associated with a damage (phase field) variable. The obtained framework allows modeling interactions and competition between grains and grain boundary cracks, as well as their effects on the effective response of the material. The proposed model is illustrated through several numerical examples involving a full description of complex crack initiation and propagation within 2D and 3D models of polycrystals.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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Multi-phase-field modeling of anisotropic crack propagation for polycrystalline materials

Nguyen, Thanh-Tung ; Réthoré, Julien ; Yvonnet, Julien ; Baietto, Marie-Christine

Berlin/Heidelberg: Springer Berlin Heidelberg

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