To Create a Static Analysis with Large Deformation
1. Create a new static analysis, if you have not already created one.
On the Static Analysis Definition dialog box, specify Name, Constraints, Loads, Convergence, and Output.
2. Select the Nonlinear / Use Load Histories check box to display the Nonlinear options area. The Output Steps area appears on the Output tab.
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If your model has elastoplastic materials, hyperelastic materials, nonlinear springs, contact interfaces, or a combination of these, the Nonlinear / Use Load Histories check box is selected by default and the cause of nonlinearity is highlighted in the dialog box.
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3. Select the Calculate Large Deformations check box.
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• For a model with hyperelastic or elastoplastic materials this check box is selected by default.
• For a model with hyperelastic materials, you cannot clear this check box, as large deformations are always calculated for such materials.
• For an model with elastoplastic materials select this check box, to study large strains in the model that occur as a result of plastic deformation. See the example of large deformation analysis for elastoplastic materials.
• For a model with contact interfaces select this check box to calculate large deformations in the model.
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4. Select the Include Snap-through check box on the Convergence tab to study the load displacement history for problems in structures with snap-through or post buckling behavior.
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The Include Snap-through check box is active only if the Calculate Large Deformations check box is selected.
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6. Click OK.
The dialog box reappears displaying the name, type, and description of the new analysis.