Random Vibration Strength Assessment

[Lee.Conti]

Hi,

I have been running MSUP random vibration and take the maximum stress against material strength. If the peak stress is higher than the yield limit, I wonder if I can use nominal stress like what I did in static analysis to compare with material strength?

Or it is supposed to do random vibration fatigue when one performs random vibration?

 

[hacksaw]

If you are dealing with fatigue, your risk of failure is determined by the peak stress and the allowable fatigue stress.