Fatigue Reliability on Endurance Limit
To me it doesn't make sense to apply standard text book reliability factors to the endurance limit for an infinite life check. IE. Modified Goodman Theory Failure Criterion. I can't find any references that provide definite direction to perform it or not to perform it. The FE manual doesn't have it as a factor, but it can't be used as reference. With the typical fatigue chart I am looking at it normally has the endurance limit past 1E7 cycles. Since the cycles go well past the 1E6 for the enduring limit, adding a reliability factor does not make sense. Adding surface finish, geometry, and notch factors does make sense. Can anyone point me to a good reference on this that says it in black and white?