Main Question or Discussion Point
To makes things simple, consider a simple beam fixed at one end an a load applied at the other. This load will produce shear stress, bending stress, and torsional stress. When looking at yield at the fixed end, do I take the biggest stress of the three or do I add their magnitudes to see if it exceeds the yield stress of the beam? Also what do I do if I have shear and bending in 2 directions?