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Fatigue behavior of transverse stiffener subjected to variable amplitude loading
The variable amplitude fatigue data were statistically analyzed to determine the effect of spectrum type for multiple comparisons between means. According to the results, the differences between the fatigue lives of the specimens cycled with the ST and MT spectra were not significant at either equivalent stress range. The stress ratio has no significant effect on variable amplitude fatigue strength unlike the constant amplitude fatigue. Therefore, all ST and MT data were combined and analyzed as one set of variable amplitude fatigue data regardless of stress ratio. In comparison with the constant amplitude mean S-N line, the data points fell on both sides of the line atfr=94 N/mm2, to the right at 80 N/mm2 with one exception, and entirely to the right at 63 N/mm2. And, the equivalent stress range model based on the mean S-N line and mean fatigue limit overestimates the fatigue strength in comparison of the constant and variable amplitude fatigue data with the predicted mean S-N curves for ST spectrum loading.
Fatigue behavior of transverse stiffener subjected to variable amplitude loading
The variable amplitude fatigue data were statistically analyzed to determine the effect of spectrum type for multiple comparisons between means. According to the results, the differences between the fatigue lives of the specimens cycled with the ST and MT spectra were not significant at either equivalent stress range. The stress ratio has no significant effect on variable amplitude fatigue strength unlike the constant amplitude fatigue. Therefore, all ST and MT data were combined and analyzed as one set of variable amplitude fatigue data regardless of stress ratio. In comparison with the constant amplitude mean S-N line, the data points fell on both sides of the line atfr=94 N/mm2, to the right at 80 N/mm2 with one exception, and entirely to the right at 63 N/mm2. And, the equivalent stress range model based on the mean S-N line and mean fatigue limit overestimates the fatigue strength in comparison of the constant and variable amplitude fatigue data with the predicted mean S-N curves for ST spectrum loading.
Fatigue behavior of transverse stiffener subjected to variable amplitude loading
KSCE J Civ Eng
Woo, Sang-Ik (author) / Jung, Kyoung-Sup (author) / Albrecht, Pedro (author)
KSCE Journal of Civil Engineering ; 6 ; 151-160
2002-06-01
10 pages
Article (Journal)
Electronic Resource
English
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