Reply To: Problem with the moment

[dlooman]

If you used true scale you shouldn't see the model expand like that.  The moment doesn't seem too large.  Are you just trying to evaluate stress in the shaft?  For that the impeller would not even need to be modeled.  If you wanted to apply the moment in a realistic way to represent the rotational acceleration of the impeller you could scope a Rotational Acceleration load to the impeller.  If you ramp the load on in several substeps you shouldn't get the error you are reporting in the initial substep.