Why phase field fracture method is better that other fracture methods?
Answers
Answer:
Phase-field models for fracture are part of the family of gradient models and overcome the issue of widening of ... damage models and the phase-field approach to fracture.
Answer:
Fracture is one of the most commonly encountered failure modes of engineering materials and structures. Prevention of cracking-induced failure is, therefore, a major constraint in structural designs. Computational modelling of fracture constitutes an indispensable tool not only to predict the failure of cracking structures but also to shed insights into understanding the fracture processes of many materials such as concrete, rock, ceramic, metals and biological soft tissues. This manuscript provides an extensive overview of the literature on the so-called phase field fracture (PFF) models, particularly, for quasi-static and dynamic fracture of brittle and quasi-brittle materials, from the points of view of a computational mechanician. PFF models are the regularised versions of the variational approach to fracture which generalises Griffith's theory for brittle fracture. They can handle topologically complex fractures such as intersecting and branching cracks in both two and three dimensions with a quite straightforward implementation. One of our aims is to justify the gaining popularity of PFF models. To this end, both theoretical and computational aspects are discussed and extensive benchmark problems (for quasi-static and dynamic brittle/cohesive fracture) that are successfully and unsuccessfully solved with PFF models are presented. Unresolved issues for further investigations are also documented.
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