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<p>Due to the nature of grain boundaries, it is challenging to simulate the transgranular and intergranular fractures in polycrystalline materials. In this contribution, to model the crack propagation inside grain’s boundaries, e.g., intergranular fracture, we introduce additional relations between tensile strength at boundary and grain, which regard to the work in Riad et al. (Finite Elem. Anal. Des., 2021), to our previous anisotropic damage model, Vuong et al. (Theor. Appl. Fact. Mec. 2022). The developed damage model can smoothly simulate interfacial fracture without requiring an expensive mesh for interface regions. Furthermore, the interplay between transgranular and intergranular&#xa0;fractures is well captured through numerical tests. Several reported interfacial fracture phenomena are reproduced to show the accuracy of the developed technique.</p>

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Transgranular and intergranular fractures in polycrystalline materials with the anisotropic smoothing gradient damage model

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Chanh Dinh Vuong,
  • Tinh Quoc Bui

摘要

Due to the nature of grain boundaries, it is challenging to simulate the transgranular and intergranular fractures in polycrystalline materials. In this contribution, to model the crack propagation inside grain’s boundaries, e.g., intergranular fracture, we introduce additional relations between tensile strength at boundary and grain, which regard to the work in Riad et al. (Finite Elem. Anal. Des., 2021), to our previous anisotropic damage model, Vuong et al. (Theor. Appl. Fact. Mec. 2022). The developed damage model can smoothly simulate interfacial fracture without requiring an expensive mesh for interface regions. Furthermore, the interplay between transgranular and intergranular fractures is well captured through numerical tests. Several reported interfacial fracture phenomena are reproduced to show the accuracy of the developed technique.