Unified phase field model to simulate both intergranular and transgranular failure in polycrystalline aggregates
| Autor: | Soukaina Riad, Didier Bardel, Julien Réthoré |
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| Přispěvatelé: | Institut de Recherche en Génie Civil et Mécanique (GeM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), FRAMATOME |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Misorientation Regularized interfaces 0211 other engineering and technologies 02 engineering and technology 01 natural sciences Intergranular failure Phase field [PHYS.MECA.SOLID]Physics [physics]/Mechanics [physics]/Solid mechanics [physics.class-ph] [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] polycrystal 0101 mathematics Anisotropy 021106 design practice & management Transgranular failure Crack propagation Applied Mathematics General Engineering Transgranular fracture Fracture mechanics Mechanics Intergranular corrosion Computer Graphics and Computer-Aided Design 010101 applied mathematics Fracture (geology) Grain boundary Crystallite Analysis |
| Zdroj: | Finite Elements in Analysis and Design Finite Elements in Analysis and Design, Elsevier, In press, ⟨10.1016/j.finel.2021.103555⟩ |
| ISSN: | 0168-874X |
| Popis: | International audience; In this work we develop a new phase field method for modeling fracture in polycrystalline materials. Many studies addressed this problem by combining cohesive models at the grain boundaries and damage models for the bulk. In this paper, a unified formulation is proposed in the phase field framework. Anisotropic failure is considered within the grain. Each of the preferential failure direction is associated with a damage variable. An additional damage variable is dedicated to the grain boundaries which are considered of finite thickness. Furthermore the value of the fracture energy at the grain boundaries is set depending on the local misorientation. The obtained model allows modeling competition and interactions between intergranular and transgranular fracture. The proposed model is illustrated through several numerical examples including crack initiation and propagation in polycrystalline aggregates. |
| Databáze: | OpenAIRE |
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