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Communication Dans Un Congrès Année : 2017

Modeling inter/ trans granular failure using an anisotropic phase field approach

Résumé

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 [1], avoiding defining an additional phase for grains; (b) an anisotropic phase field model [2]; (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.
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Dates et versions

hal-01558550 , version 1 (18-07-2017)

Identifiants

  • HAL Id : hal-01558550 , version 1

Citer

Thanh Tung Nguyen, Julien Réthoré, Julien Yvonnet, Marie-Christine Baietto. Modeling inter/ trans granular failure using an anisotropic phase field approach. Fifth International Conference on Computational Modeling of Fracture and Failure of Materials and Structures, Jun 2017, Nantes, France. ⟨hal-01558550⟩
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