Thermal condition - can not compute

[FC2008]

Hi,
I am getting some funny results when using thermal condition.

I just put a uniform temperature on, not higher than 225degC (437degF) and run a Static Structural analysis to look at the von mises equvalent stresses.
I have one fixed constraint, and no other forces/moments.
The material is the default Structural Steel.

What puzzles me is the fact that the Von Mises stresses go way above the materials yield. And it is not only a notch stress, it is pretty well distributed.

By the way, I am using workbench V.11.

Can someone tell me what I am doing wrong? Thank you.

 

[corus]

If the temperature is applied to a shell you may find you've applied it to only one surface, effectively giving you a through wall temperature difference.

corus

 

[bagarbilla]

First on what are you running the analysis

Second i am just wondering how you getting results of thermal input to structural analysis with only one fixed constraint.