Verification & Validation
Biased edge sizing can be applied to the model to get a dense mesh at the crack tip (center of the semicircle). The mesh convergence study is shown below. A bias factor of 50 is used. The stresses are measured in Pascals.
number of division=100, face sizing=2m
number of division=200, face sizing=1m
number of division=400, face sizing=0.5m