peteroznewman
Subscriber

In SpaceClaim, you can select all the faces on the top face of the material thickness with a few mouse clicks, since they are all connected with tangent faces.


Ctrl-C to copy those faces and Ctrl-V to paste them in as a surface.


Now delete the solid.  You can use that surface directly in mechanical and define the element offset to the top or bottom to compute the bending correctly.