Verification & Validation — Lesson 8

"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.

There is only a slight change after 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.