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An extended FE strategy for transition from continuum damage to mode I cohesive crack propagation. (English) Zbl 1108.74052
Summary: An integrated strategy is proposed for the simulation of damage development and crack propagation in concrete structures. At the initial stage of damage growth, concrete is considered to be macroscopically integer and is modeled by a non-symmetric isotropic non-local damage model. The transition to the discrete cohesive crack model depends on the local mesh size, and is driven by an analytical estimate of the current bandwidth. When a crack is introduced in the model, an extended finite element approach is used to follow the propagation path, independent of the background mesh. The proposed methodology is tested on a notched tension specimen, and then is applied to the analysis of a wedge splitting test.

MSC:
74R10 Brittle fracture
74S05 Finite element methods applied to problems in solid mechanics
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