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Re: pic: Broken Output Shaft
Learning how to use COMSOL 4.0 at work (an excellent FE program for those who are interested, much better than COMSOL 3.5) I decided to see if it could show the stress risers in this particular situation, and it did so quite well. I've attached two plots. One plot is of the surface stresses, which does indeed show the stress concentrations in the groove. However, I find the slice plot much more illuminating as to why this groove is a stress riser. If you look at how the shear stress flows through the part you can see that it likes to stay near the outside surface, but the snap ring groove abruptly forces stress towards the middle, compressing the stress (if you will) around the groove.
Pay no attention to the magnitude of the stresses, I just picked a load number out of the air that was close-ish.
PS- I hope no one is too upset about reviving an older thread.
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Last edited by JamesCH95 : 21-10-2010 at 14:00.
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