Exercise 1:

Using one-dimensional link or bar elements, create a one-dimensional mesh for the stepped shaft using elements with different cross-sectional areas. Note what happens at the sharp re-entrant corner. Refine the mesh in the vicinity of the step and report your results for the stress variation across the step. 

Exercise 2:

Rerun the SimCafe tutorial refining the mesh in the vicinity of the fillet. Using h-convergence mesh refinement, optimize the ratio of element edge length to fillet radiusUnder construction