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Authors: Rajesh Bhaskaran and Vincent Prantil
Problem Specificat=
ion
1. Pre-Ana=
lysis & Start-Up
2. Geometry
3. Mesh
4. Physics Setup
5. Numerical Solution
6. Numerical Results
7. Verification & V=
alidation
=
Exercises
C=
omments
"Verification and validation" can be thought of as a formal process for =
checking results. We previously performed some sanity checks on the deforme=
d shape. A further basic check is how the results change on refining the me=
sh. The following video shows how to recalculate the results including the =
stress concentration factor on a refined mesh.
In the table below, the axial stress concentration factors on the original and refined meshes are compared with the hand calculati= on from the Pre-Analy= sis step. Recall that the hand calculation used a formula from Roar= k=E2=80=99s 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 concentra= tion factor on either mesh is accurate to within the level of accuracy of t= he cited formula, i.e. 5%. This increases our confidence in the ANSYS resul= ts.