A bond-level energy-based peridynamics for mixed-mode fracture in rocks

This paper deals with the numerical simulation of initiation and propagation of mixed mode fracture in rocks. A bond-level energy-based peridynamic model is developed by introducing a dilatation function to capture both volumetric and deviatoric deformations. We proceed to define the nonlocal stress...

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Bibliographic Details
Published in:Computer methods in applied mechanics and engineering 2023-09, Vol.414, p.116169, Article 116169
Main Authors: Wang, Yunteng, Wu, Wei
Format: Article
Language:English
Subjects:
Energy-based failure criteria
Mixed-mode fracture
Nonlocal stress tensor
Ordindary state-based peridynamics
Rock materials
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Summary:This paper deals with the numerical simulation of initiation and propagation of mixed mode fracture in rocks. A bond-level energy-based peridynamic model is developed by introducing a dilatation function to capture both volumetric and deviatoric deformations. We proceed to define the nonlocal stresses to obtain the isotropic and deviatoric forces commensurate with the deformations. We then come up with a new failure model to link computational peridynamics with some phenomenological failure criteria, which is highly relevant for both brittle and quasi-brittle rocks. Finally, several numerical examples of mixed-mode fractures are presented to show the performance of our model.
ISSN:0045-7825
1879-2138
DOI:10.1016/j.cma.2023.116169