"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.
<iframe width="600" height="338" src="//www.youtube.com/embed/oqKk62f_e9o?rel=0" frameborder="0" allowfullscreen></iframe> |
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 Roarkās Formulas for Stress and Strain.
ANSYS, Original mesh |
ANSYS, Refined mesh |
Hand calculation |
---|---|---|
1.309 |
1.316 |
1.377 |
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.
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