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Fig. 12 S-N curves obtained
by the NN-NARX model and
the experimental data for
R = 2 of Material I
Fig. 13 S-N curves obtained
by the NN-NARX model and
the experimental data for,
respectively, R = 0.5 and 1
of Material II-on-axis
Fig. 14 S-N curves obtained
by the NARX model and the
experimental data for,
respectively, R = 0.5 and
1
of Material II-45
°
NN-NARX model prediction results can fairly follow the experimental data trend.
For Material II-on-axis, the NN fatigue life prediction results of R = 0.5 were good
at some stress levels, while those of R =
1 were all underestimated compared to
those of the experimental data. For the later, it can be said nonetheless that although
the corresponding NN fatigue life prediction results were far enough with those of
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