![]() ![]() The results represent excellent agreement with available analytical, numerical and experimental observations in the literature. I really dont know where to start, I would like an approach that allows me to specify a damage criteria. I want to avoid element deletion, perhaps a solution using xfem. ![]() The accuracy and robustness of the proposed method are examined by several numerical examples for stationary and propagating crack problems in 2D and 3D settings. I have a material thermally expanding it is quite brittle and I was hoping for some advice as to how to make the crack start, propagate and eventually terminate and maybe close. All implementational aspects and suggested remedies for the treatment of enriched elements, framework setup, evaluation of stress intensity factors, and numerical integration are described in detail. The model pre-processing, level set update, stress intensity factor calculation and crack propagation analysis are conducted by employing COMSOL's built-in features in conjunction with external MATLAB functions through COMSOL LiveLink. The Linear Elastic Fracture Mechanics (LEFM) is exclusively adopted for the crack analysis. To this end, for each set of enrichment functions, an additional Solid Mechanics module is incorporated into the numerical framework, coupled with compatible modifications to the internal variables. An enrichment strategy is proposed, consistent with the structure of the software. This paper presents the first time implementation of the eXtended Finite Element Method (XFEM) in the general purpose commercial software COMSOL Multiphysics.
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