Asymptotic fields at the tip of a cohesive frictional crack growing at the bi-material interface between a dam and the foundation rock
| Autor: | Silvio Valente, Andrea Alberto |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Engineering
Asymptotic analysis Bi-material Crack growth resistance curve Growth model Crack closure gfem xfem General Materials Science Geotechnical engineering Extended finite element method business.industry fracture process zone Mechanical Engineering Crack tip opening displacement Fracture mechanics cohesive crack asymptotic analysis Cohesive zone model fracture mechanics Mechanics of Materials Finite Element Method non-linear fracture mechanics simulations business Asymptotic expansion |
| Zdroj: | Engineering Fracture Mechanics. 108:152-161 |
| ISSN: | 0013-7944 |
| DOI: | 10.1016/j.engfracmech.2013.05.005 |
| Popis: | One of the weakest points in concrete dams occurs at the rock/concrete interface at the base of the dam. This has prompted interest in studying the interface laws that can best represent the interaction between damage due to normal stresses and damage caused by tangential stresses (traction–separation law) in the process zone, within the framework of the cohesive crack model. Karihaloo and Xiao (2008) proposed a model considering the Coulomb friction between the crack faces, instead of a tangential cohesive relationship. This model is called the cohesive-frictional crack model,and it is different from the model of frictional contact of crack faces, because the friction operates when the crack faces are open. The above mentioned authors published asymptotic expansions at a cohesive crack tip propagating along an interface between similar elastic media. In the present paper, a new asymptotic expansion is presented and applied to the case of a crack propagating at a bi-material interface between a dam and the foundation rock. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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