Fastener Fatigue Analysis

Following are some fastener design and analysis examples. Unfortunately I don't think they include fatigue. Sorry about that. (I haven't verified the accuracy of these pages.)

Try the ASM Metals Handbook volume 11 "Failure Analysis and Prevention".

Good Luck

Machinery's handbook has a section on bolt torque, tension, and fatigue - - however, my copy (25th Edidtion) appears to have some small error(s) of some sort.
If you use the numbers you get from the Torquing guide there, but make the units ft-lbs, rather than the inch-lbs it says, you will be pretty close to standard guides.

Otherwise, here's a quick guide:
n is expected number of cycles
if n>1,000,000 use n=1,000,000

For Grade 5 Bolts: D = 1/4'' - 1-1/4''
T = [ 1 - (log)/30)*10^(3.95 + 3.145log(D) )

For Grade 5 Bolts: D = 1-3/8'' - 2-1/2''
T = [ 1 - (log)/30)*10^(3.96 + 3.07log(D) )


For Grade 8 Bolts: D = 1/4'' - 1-1/4''
T = [ 1.25 - (log)/24)*10^(3.95 + 3.145log(D) )

For Grade 8 Bolts: D = 1-3/8'' - 2-1/2''
T = [ 1.25 - (log)/24)*10^(3.96 + 3.07log(D) )

Hope this helps
Curmudgeon