If I consider the bending stress due to the weight, and the bending stress due to the motor torque then to combine them would I simply add them? Von Mises wouldn't apply here would it?
There are actually 2 angles that support the fan, which is mounted in between them so there shouldn't be a torque on the angle per se. I'm thinking the torque acts to rotate the angles, which is resisted by the clamp load of the bolts.
I'm looking at hanging a large industrial fan from 3 x 3 x 1/4" angles. I have the static load of the fan and the torque from the manufacturer. In terms of stress analysis to make sure my angles are sized right for the 8ft span, I'm looking at bending stress (Mc/I) and shear stress (3/2 V/A)...
