Strategy: Minimizing Singularities
To minimize singularities, consider the following:
• Use distributed loads and constraints whenever possible to avoid singular stress or displacement concentrations that could distort your results. Use the Total Load At Point option to distribute a point load over a surface or curve in a statically equivalent manner. You can also use weighted links to spread the effect of applied loads.
• If you cannot avoid singularities, use the
Isolation for shells and 2D solids area of the
AutoGEM Settings dialog box to create a set of small, transitional elements around singular points, edges, or reentrant corners.
• For more precise control, you can create
Isolate for Exclusion AutoGEM controls to create small, transitional elements around singular points, edges, or reentrant corners. When you define an analysis, you may optionally check the
Excluded Elements checkbox on the analysis definition dialog box, so that
Creo Simulate ignores the selected transitional elements when calculating convergence and measure quantities. This minimizes the effect of the singularities on your results.
Sometimes, when trying to avoid element singularities, you impose too few constraints. In these cases, a run may end with an error message in the summary file indicating that your model is insufficiently constrained. For more information on how to address this condition, see
Insufficiently Constrained Models.