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Quasi-static thermoelastic fracture: Adaptive phase-field modeling with variable-node elements
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DOI：10.1016/j.tafmec.2023.103811.png)
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摘要
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Although robust in handling different fracture processes such as nucleation, branching and coalescence, the phase-field method (PFM) is computationally very expensive because it requires extremely fine meshes to resolve the necessary physics. This paper presents a hybrid adaptive PFM discretized by using finite element method to model quasi-static fracture of thermoelastic solids and quenching. Based on a user-defined threshold on the phase field variable, the computational domain is local refined. The incompatibility between the meshes due to local refinement is directly handled by the variable-node elements, without the special handling of hanging-nodes. The coupled phase-field thermo-elastic equations are solved using the hybrid approach combined with a staggered solution scheme, and the robustness of the proposed framework in terms of capturing the crack morphology is demonstrated with several standard benchmark problems.
Keyword:
Variable node finite element method
Hanging nodes
Adaptive phase field method
Thermo-mechanical loading
期刊
IF:
5.6
论文数:
4.7K
被引数:
1.3W
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