I can't find the answer to this question in my old textbooks or online! Please see the image at the following link. http://tinypic.com/r/20qjt60/5 It is a small stepped stem in a cantilever beam position. If I have a force F at the end of the beam, the bending stress will be My/I correct? How can I calculate I and y correctly? Is I about an x-axis at the fixed end? Also, will cantilever beams exceed yield strength in bending before failure in shear in this case? Are there significant stress concentrations at the step? I really appreciate any help you may give. Thanks!