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On the application of cohesive crack modeling in cementitious materials
Abstract Cohesive crack models—in particular the Fictitious Crack Model – are applied routinely in the analysis of crack propagation in concrete and mortar. Bridged crack models—where cohesive stresses are assumed to exist together with a stress singularity at the crack tip—on the other hand, are used typically for multi scale problems such as crack propagation in fiber reinforced composites. Mortar and concrete, however, are multi-scale materials and the question naturally arises, if bridged crack models in fact are more suitable for concrete and mortar as well? In trying to answer this question a model for a centrally cracked sheet is established applying semi-analytical, bridged and fictitious crack modeling. The semi-analytical crack model is compared with a FEM analysis and it is demonstrated, that the standard fictitious crack implementation in FEM packages (in this case DIANA) provides a good approximation. Further, a quantitative condition is established indicating when a bridged crack model can be approximated with a cohesive crack model with smooth crack closure in terms of the ratio between the energy dissipation associated with the crack tip and the process zone.
On the application of cohesive crack modeling in cementitious materials
Abstract Cohesive crack models—in particular the Fictitious Crack Model – are applied routinely in the analysis of crack propagation in concrete and mortar. Bridged crack models—where cohesive stresses are assumed to exist together with a stress singularity at the crack tip—on the other hand, are used typically for multi scale problems such as crack propagation in fiber reinforced composites. Mortar and concrete, however, are multi-scale materials and the question naturally arises, if bridged crack models in fact are more suitable for concrete and mortar as well? In trying to answer this question a model for a centrally cracked sheet is established applying semi-analytical, bridged and fictitious crack modeling. The semi-analytical crack model is compared with a FEM analysis and it is demonstrated, that the standard fictitious crack implementation in FEM packages (in this case DIANA) provides a good approximation. Further, a quantitative condition is established indicating when a bridged crack model can be approximated with a cohesive crack model with smooth crack closure in terms of the ratio between the energy dissipation associated with the crack tip and the process zone.
On the application of cohesive crack modeling in cementitious materials
Stang, Henrik (author) / Olesen, John Forbes (author) / Poulsen, Peter Noe (author) / Dick-Nielsen, Lars (author)
Materials and Structures ; 40 ; 365-374
2007-01-18
10 pages
Article (Journal)
Electronic Resource
English
On the application of cohesive crack modeling in cementitious materials
| British Library Conference Proceedings | 2007
On the application of cohesive crack modeling in cementitious materials
| Online Contents | 2007
On the application of cohesive crack modeling in cementitious materials
| British Library Online Contents | 2007
On the application of cohesive crack modeling in cementitious materials
| Online Contents | 2007
On the application of cohesive crack modeling in cementitious materials
| Online Contents | 2007