期刊
THEORETICAL AND APPLIED FRACTURE MECHANICS
卷 96, 期 -, 页码 174-192出版社
ELSEVIER
DOI: 10.1016/j.tafmec.2018.04.011
关键词
Phase field; Rock; COMSOL; Crack propagation; Crack branching
资金
- Sino-German (CSC-DAAD) Postdoc Scholarship Program 2016
- Natural Science Foundation of China [51474157]
- RISE-project BESTOFRAC [734370]
We present a phase field model (PFM) for simulating complex crack patterns including crack propagation, branching and coalescence in rock. The phase field model is implemented in COMSOL and is based on the strain decomposition for the elastic energy, which drives the evolution of the phase field. Then, numerical simulations of notched semi-circular bend (NSCB) tests and Brazil splitting tests are performed. Subsequently, crack propagation and coalescence in rock plates with multiple echelon flaws and twenty parallel flaws are studied. Finally, complex crack patterns are presented for a plate subjected to increasing internal pressure, the (3D) Pertersson beam and a 3D NSCB test. All results are in good agreement with previous experimental and numerical results.
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