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This tutorial was created with an older version of ANSYS (14.5), where the mesh generator and the refinement process was not as strong as it is now. This will result in a different solution than the one shown; work is being done to update to the newer version as soon as possible. (In ANSYS 16.1, the optimization results in a radius of ~1.25in-1.27in) |
Verification & Validation
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The convergence criteria which was inserted earlier was used to view the effect of mesh refinement with a radius of 1.4853 inches.
Number of Elements | Equivalent Von Mises Stress (PSI) | Percent Change |
|---|---|---|
244 | 32,495 |
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775 | 32,712 | 0.6656 |
As one can see from the data above, over the course of the mesh refinement, the equivalent Von Mises Stress only changes by less than one percent. Thus, the solution has been verified with respect to mesh refinement. However, notice how the equivalent Von Mises Stress now lies above our constraint. While our optimization looked promising, we had not taken into account the slight change in results from a finer mesh.
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The optimization was carried using each of the four optimization methods offered in ANSYS workbench. Note that the default optimization method in ANSYS is Screening.
Optimization Method | Radius (In) | Volume (In^3) | Equivalent Von Mises Stress (PSI) |
|---|---|---|---|
Screening | 1.3278 | 9.8615 | 32,484 |
MOGA | 1.3267 | 9.8618 | 32,500 |
NLPQL | 1.3291 | 9.8613 | 32,503 |
As one can see from the table above, there is no significant differences between the results from the four methods.
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