Fatigue allowable at hole in steel plate
Fatigue allowable at hole in steel plate
(OP)
Hi all.
Can anyone suggest what fatigue allowables I should use at the steel just around a bolt hole, where the bolt is loaded in tension/compression, as well as the reference used?
Looking for infinite life,
Bolt load fluctuates from -1460 to +1460 lb
Method of analysis - linear static FE
Load applied on a circle (not on a cylindrical surface)
thanks in advance,
tg
Can anyone suggest what fatigue allowables I should use at the steel just around a bolt hole, where the bolt is loaded in tension/compression, as well as the reference used?
Looking for infinite life,
Bolt load fluctuates from -1460 to +1460 lb
Method of analysis - linear static FE
Load applied on a circle (not on a cylindrical surface)
thanks in advance,
tg





RE: Fatigue allowable at hole in steel plate
RE: Fatigue allowable at hole in steel plate
RE: Fatigue allowable at hole in steel plate
I'd suggest the method in Michael Niu's book "Airframe Structural Design", pp232, where he combines the bypassing stress and the load transfer to determine a stress concentration factor.
RE: Fatigue allowable at hole in steel plate
The stress concentration factor for a hole is 3.0
Ed.R.
RE: Fatigue allowable at hole in steel plate
corus
RE: Fatigue allowable at hole in steel plate
The 50% recomendation is only for polished steels with no surface discontinuities and with lower UTS, it is really only a special case. The endurance limit will lie anywhere below this and really depends on the steel grade and thermomechanical history. If you can find an S-N curve for your steel you will learn an awful lot.
RE: Fatigue allowable at hole in steel plate