Finite Element Study of Brittle Fracture by Mohr-Coulomb Failure Criterion
NET2D is a Lagrangian explicit time-integration finite element code for analyzing dynamic impact phenomena. It uses a four-node quadrilateral element for a two-dimensional (2-D) problem. For a more accurate and robust contact force computation, the defense node algorithm was adopted. In this work, the Mohr-Coulomb failure condition was implemented for NET2D. If the failure condition is satisfied along any finite element interface, the nodes on the interface will be debonded and the contiguous two elements will be separated. The failure load and mode were examined for the cleavage fracture of brittle material. The numerical results were compared with the theoretical predictions by Mohr-Coulomb and Griffith criteria.
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Document Type: Research Article
Publication date: September 1, 2018
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