Vibration Fatigue

[izax1]

Can anyone direct me to articles, books etc. on fatige calculations on wide band random process?? I have already checked Steinberg, but that seems to cover only narrow band processes.

From my FE analysis, I have the random response (No. of positive crossings, rms stress, PSD stress etc.) I need to calculate the fatigue damage from three dominant freuency peaks.

Where can I look???

Thanks

bernt

 

[KalleH]

I agree with Dampit. Dirlik-Bishops method is the most appropriate one for non-narrow bandwidth noise that can be characterized as stationary random.

It will give you a nice range-no mean histogram, which you can use to calculate damage. HalfPenny @ nCode has written a nice indroduction to the method. It used to be available on the web.

A small word of caution though. Make sure your load can be considered as being stationary random.
Otherwise: stuff in -> stuff out

Cheers!