Add h-refinement
Description
Adaptive grid refinement (h-refinement) can be used to decrease the discretization error in the solution, which can be suitable especially for evaluating the stresses near fiber ends, which cause singularities. However, it is currently unclear which error estimator to use.
Proposal
- Choose and implement and error estimator
- Add h-refinement as solver option
- Implement h-refinement as iterative process:
- Solve on the current grid
- Compute error estimator
- Refine grid based on estimator
- Repeat