desertfox,
Thank you for the information. I still have the problem of my mean stress component being very high while the alternating component ( (kb/(kb+kj))*F in this case ) is very low. Not so much an issue except the fact that the mean component causes me to get unrealistic results...
So I threw together a rough model of what I'm looking at. What I'm trying to look at is how much tension 'T' is in the bolt. We have a force due to preload 'P' and then an alternating force 'F'. Based on my observations, I'd feel like the tension would be P+F. So my mean stress component would...
Sorry, the bolt is preloaded (tightened) then the pieces it holds together are subjected to an axial load in tension.
The part that confuses me is that several places people have discussed that as long as the axial load doesn't exceed the bolt preload force, there is no alternating component...
I feel like I'm missing something simple here. I'm doing a simple fatigue analysis on a bolt. The loading scenario is a simple repeated load. The part that I am struggling to figure out is how to consider the bolt preload. I've prescribed a torque spec and can find a nominal stress due to...
