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A FEniCS implementation of the phase field method for quasi-static brittle fracture
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作者 HIRSHIKESH Sundararajan NATARAJAN Ratna Kumar ANNABATTULA 《结构与土木工程前沿:英文版》 EI CSCD 2019年第2期380-396,共17页
In the recent years, the phase field method for simulating fracture problems has received considerable attention. This is due to the salient features of the method: 1) it can be incorporated into any conventional fini... In the recent years, the phase field method for simulating fracture problems has received considerable attention. This is due to the salient features of the method: 1) it can be incorporated into any conventional finite element software;2) has a scalar damage variable is used to represent the discontinuous surface implicitly and 3) the crack initiation and subsequent propagation and branching are treated with less complexity. Within this framework, the linear momentum equations are coupled with the diffusion type equation, which describes the evolution of the damage variable. The coupled nonlinear system of partial differential equations are solved in a 'staggered? approach. The present work discusses the implementation of the phase field method for brittle fracture within the open-source finite element software, FEniCS. The FEniCS provides a framework for the automated solutions of the partial differential equations. The details of the implementation which forms the core of the analysis are presented. The implementation is validated by solving a few benchmark problems and comparing the results with the open literature. 展开更多
关键词 phase field method FEniCS BRITTLE FRACTURE CRACK PROPAGATION VARIATIONAL theory of FRACTURE
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