The spectral moment for a PSD is nth (B-1) where f is frequency G(f) is the one-sided PSD The expected peak rate is (B-2) The Dirlik histogram formula N(S) for stress cycles ranges is (B-3) where T is the duration S is the stress cycle range (peak-to-peak) The function p(S) is (B-4) The coefficients and variables are (B-5) (B-6) (B-7)
The nth spectral moment for a PSD is (B-1) where f is frequency G(f) is the one-sided PSD The expected peak rate is (B-2) The Dirlik histogram formula N(S) for stress cycles ranges is (B-3) where T is the duration S is the stress cycle range (peak-to-peak) The function p(S) is (B-4) The coefficients and variables are (B-5) (B-6) (B-7)
psd_fatigue_comparison_revA.docx