Issue 40

L. Zou et alii, Frattura ed Integrità Strutturale, 40 (2017) 137-148; DOI: 10.3221/IGF-ESIS.40.12 146 Figure 6 : Determine of the fatigue characteristics domains. Mean Mean 1 Mean 2 Mean 3 Mean 4 Mean 5 Mean 6 A 3.206 3.369 3.483 2.972 3.268 3.509 3.689 B –0.2139 –0.2398 –0.2626 –0.1844 –0.2213 –0.2607 –0.2866 Table 5 : Coefficients of the Basquin equation Figure 7 : S-N curve modeling based on the fatigue characteristics domain In the process of statistical analysis, the goodness-of-fit statistics including SSE, R-square, adjusted R-square and RMSE of Mean 1 -Mean 6 are shown in Tab. 6. Mean 1 Mean 2 Mean 3 Mean 4 Mean 5 Mean 6 SSE 0.0068 0.0129 0.0648 0.08228 0.0291 0.0013 R-square 0.9465 0.8795 0.7263 0.7877 0.8983 0.9897 Adjusted R-square 0.9389 0.8695 0.7053 0.7665 0.8813 0.9871 RMSE 0.0312 0.0328 0.0706 0.09071 0.0696 0.0181 Table 6 : Goodness-of-fit statistics of Mean 1 -Mean 6 .