PSI - Issue 28

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Giovanni Meneghetti et al. / Procedia Structural Integrity 28 (2020) 1062–1083 G. Meneghetti/ Structural Integrity Procedia 00 (2019) 000–000

1069

5) Evaluate the stress singularity exponents λ i and the averaged SED coefficients e i as a function of the notch opening angle of the considered location (weld toe or root side) and of the material (see Table 1) 6) Evaluate the PSM parameters f wi from Eq. (7) and the mean stress correction factors c wi from Eq. (3), for each loading mode.

7) Evaluate the equivalent peak stress from Eq. (6) and the local biaxiality ratio λ from Eq. (8)

8) Select the proper PSM fatigue design curve according to the criterion defined in Table 3

9) By comparing the equivalent peak stress calculated at point (7) with the selected PSM fatigue design curve, estimate the fatigue life with a desired survival probability.

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