Why doesn't the solution of the analysis change upon further optimization in grid size, but remains constant while doing a grid independent study?

07 July 2014 1 7K Report

There is not really enough information to provide you with an accurate answer BUT if the FE model you are using is able to capture the exact solution then mesh refinement is superfluous. For example, all (most) finite elements can model exactly a constant stress state so if your loading conforms with such a state the solution will be independent of mesh refinement.

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