Issue 54

R. B. P. Nonato, Frattura ed Integrità Strutturale, 54 (2020) 88-103; DOI: 10.3221/IGF-ESIS.54.06

Fig. 10 shows the distribution realizations with respect to the mentioned load condition, which covers just a little portion of the S-N curve. The correlation factor is φ SN = 0.7922, which demonstrates great influence of the UIQ S on the SRQ N.

Figure 10: Sensitivity analysis of SRQ stress related to the SRQ fatigue life and their deterministic values.

Correlation coefficient φ bS = -0.3747 φ hS = -0.8347 φ FS = 0.0790 φ bN = 0.3048 φ hN = 0.6531 φ FN = -0.0685

UIQ

SRQ

b

S MAX

h

S MAX

F

S MAX

b

N

h

N

F

N

S MAX φ SN = -0.7922 Table 5: Correlation coefficients between UIQs and SRQs. N

Combining the information from Tabs. 3, 4, and 5, the cross-section height h is the aleatory-type UIQ with simultaneously the greatest dispersion and the greatest impact on the stress SRQ. In the second position, the parameter b; and the last in dispersion and correlation is the applied load. It is important to observe that not always the one with the highest correlation will have the greatest dispersion.

Figure 11: P-boxes of SRQs stress and number of cycles, and their deterministic values.

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