Discussion
Assertion (A): A stress singularity at a sharp re-entrant corner does not converge with mesh refinement.
Reason (R): The elasticity solution is genuinely unbounded at such a corner.
Select the correct answer from the options below.
Answer: B
Both are true and the second explains the first. Refining the mesh merely produces a larger number, so the honest responses are to model the fillet the real part has, or to assess the region by fracture mechanics instead.
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