Handling Stress Concentrations
If you apply loads to datum points or curves, be aware of the following:
• Point loads can introduce theoretically infinite stresses or fluxes in both solid and shell models. These problems can lead to poor accuracy for analysis results.
• Curve loads can introduce theoretically infinite stresses or fluxes in solid models.
You may want to define a small surface region and apply the load to the region instead of to a point. This approach distributes the stresses and fluxes over a slightly wider portion of the model, avoiding concentration problems.
Alternatively, you can create one or more small
excluded elements near the point or curve with the help of
Isolate for Exclusion AutoGEM Control, so that results are not distorted in surrounding elements.