Okay I'm in 2009 SP4.1 so this might be a glitch that no longer exists. I was having problems getting 1 component of an assembly to mesh so I decided to investigate it separately to find usable mesh settings. Found those, but when I did a simple simulation to verify it was sufficient I get some screwy results.
It's a welded shaft with differing cross-sections. I started with 2 bearing supports then switched to 2 circular fixtures, both give weird results. It is fine using a centrifugal load only, but applying gravity or a pressure/force on the OD face towards a reference plane is being misinterpretted somewhere.
Hints? Am I missing something here or is this simply a glitch in the Matrix? I tried gravity and centrifugal on a plain tube and things were fine.
setup of tube with gravity and 2 cylindrical fixtures
with centrifugal forces the results are reasonable, very small radial expansion
But when I apply gravity it acts like it is a HUGE centrifugal load. It should be bending downward, in the middle, not expanding radially.