A thick level set approach to model evolving damage and transition to fracture
Résumé
Local damage models are known to suffer from spurious localization and present therefore a high sensitivity to the mesh. Several damage models were proposed in the literature to avoid these issues [1], as for instance non-local damage models [2, 3] or higher order gradients models [4, 5]. We proposed a new approach for damage growth modeling in solids [6], using level set functions to represent the damaged zones. The damage front is then located on the iso-zero of the level set. Its propagation can be described in terms of the energy along the front while its curvature is used to introduce a characteristic length in the model.
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