08 December 2018
- Last edited 08 December 2018
I'm travelling and this laptop only has 18.2 so I can't give you back an 18.1 archive, but I will make screen shots to explain.
1) The geometry has overlapping solids causing interference. Fix that in SpaceClaim by using the flat face of the long part to Split Body on the end part to delete the triangular piece. I will assume you did that. Next, in SpaceClaim, set Share Topology to Share.
Sandeep thinks as I do, that Sweep is a good Method in this case. In Mechanical, RMB on Mesh and Show Sweepable Bodies. The long part will not turn green. The reason is the faces don't match on the top and bottom. At most of the junctions, there is a line across the top and bottom face at the transition. At one of the junctions, there is no line. There either has to be all lines or no lines in order to sweep. Do you see the missing line?
Unless you need to divide the face to apply a load, it is best to remove all unnecessary lines. This is easily done in SpaceClaim by picking the Repair tab and then clicking the Extra Edges button. It will remove all the lines on the top and bottom face. Refresh the Project then in Mechanical, RMB on Mesh and Show Sweepable Bodies and the long part turns green.
2) You mentioned you are losing features due to mesh defeaturing, so turn it off.
3) Delete all the Hex Dominant mesh controls and add a Mesh Control Method called Sweep.
I see now why you had those lines!
To Sandeep's point about improvements to meshing in each version, here is what the 19.2 mesh looked like with the edges removed.
When I added the missing line, the body didn't show as Sweepable. Instead, I Split Body at each transition. Now with Sweep Method applied to just the center body, all the other bodies follow along because of the Shared Topology.