For linear static studies, a new incremental processing option is available in the Create Study (or Modify Study) dialog box, under Advanced Options. The new option, Large Displacement Solve, specifies that iterative processing is used to solve the study. This produces a more accurate solution in studies where the deflection of the model is large relative to the dimensions of the model.
Example:
Consider a sheet metal part with a narrow thickness. If the linear static analysis results compute the displacement of the part to be a high value relative to the size or thickness of the part, then a more accurate solution would be produced using the Large Displacement Solve option.