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This particular optimization problem has two output parameters: the maximum Von Mises stress and the volume of the quarter plate. In order to specify the two output parameters, first open the (Open) Mechanical > (Expand) Geometry > (Highlight) Surface Body. In the "Details of "Surface Body"" table expand Properties then check the box to the left of Volume. A "P" should now be located within the box.
Go to Step 4: Design of Experiments
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