Publication:
Quasi-static thermoelastic fracture: Adaptive phase-field modeling with variable-node elements

Placeholder Image
Date
01-04-2023
Journal Title
Journal ISSN
Volume Title
Publisher
Research Projects
Organizational Units
Journal Issue
Abstract
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.
Description
Keywords
Adaptive phase field method, Hanging nodes, Thermo-mechanical loading, Variable node finite element method
Citation
Collections