A novel method coupling the scaled boundary finite element method (SBFEM) and the finite element method (FEM) is developed for linear elastic fracture modelling. A very simple but effective remeshing procedure based on the FE mesh only is used to accommodate crack propagation. The crack-tip region is modelled by an SBFE subdomain whose semi-analytical displacement solutions are used to extract accurate stress intensity factors. The SBFE subdomain is coupled with the surrounding FE mesh through virtual interfaces so that non-matching nodal discretisations of the shared boundaries can be used and only one SBFE subdomain is needed at a crack-tip. A few plane problems are modelled to validate the new method.
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- Scaled boundary finite element method
- Non-matching mesh
- Stress intensity factors
- Crack propagation
- Remeshing procedure
- Linear elastic fracture mechanics
Yang, Z., Wang, X. F., Yin, D. S., & Zhang, C. (2015). A non-matching finite element-scaled boundary finite element coupled method for linear elastic crack propagation modelling. Computers and Structures, 153(June), 126-136. https://doi.org/10.1016/j.compstruc.2015.02.034