Yes, exclude the B area from the simulation. But how exactly are you going to do that? You can't just have a fixed support at the cut face. You need to allow the section to get smaller the way it does when you have area B.nUse three planes of symmetry and keep 1/8 of the narrow center section. The face opposite the center plane cut will have a displacement in Y only, leaving X and Z Free (assuming Y is vertical).n