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<p>To investigate the deformation and crack propagation behavior of rock, a modified Mohr–Coulomb yield criterion is integrated into peridynamics theory to develop an elastoplastic model. A return mapping algorithm is presented to determine the strain increment corresponding to the stress increment, while updating the force state on the virtual bonds. Cumulative plastic deformation is used as the criterion for fracture initiation in the virtual bonds. The model is applied to simulate the fracture propagation and coalescence behavior of both single-flaw rocks with a central hole and multi-flaw rocks. The results demonstrate that the proposed model effectively captures the fracture propagation paths in both single- and multi-flaw rocks under uniaxial loading.</p>

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Numerical Analysis of Fracture and Crack Propagation in Rock Materials Based on Peridynamics

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Lei Kou,
  • Yibo Wang,
  • Xin Wen,
  • Huan He,
  • Zhihui Xiong

摘要

To investigate the deformation and crack propagation behavior of rock, a modified Mohr–Coulomb yield criterion is integrated into peridynamics theory to develop an elastoplastic model. A return mapping algorithm is presented to determine the strain increment corresponding to the stress increment, while updating the force state on the virtual bonds. Cumulative plastic deformation is used as the criterion for fracture initiation in the virtual bonds. The model is applied to simulate the fracture propagation and coalescence behavior of both single-flaw rocks with a central hole and multi-flaw rocks. The results demonstrate that the proposed model effectively captures the fracture propagation paths in both single- and multi-flaw rocks under uniaxial loading.