Verification & Validation
"Verification and validation" can be thought of as a formal process for checking results. We previously performed some sanity checks on the deformed shape. A further basic check is how the results change on refining the mesh. The following video shows how to recalculate the results including the stress concentration factor on a refined mesh.
Axial Stress Concentration Factor
In the table below, the axial stress concentration factors on the original and refined meshes are compared with the hand calculation from the Pre-Analysis step. Recall that the hand calculation used a formula from Roark’s Formulas for Stress and Strain.
ANSYS, Original mesh
ANSYS, Refined mesh
There is only a slight change on refining the mesh. The stress concentration factor on either mesh is accurate to within the level of accuracy of the cited formula, i.e. 5%. This increases our confidence in the ANSYS results.