切欠きを有する平織擬似等方CFRP積層板の異なる応力比に対するS-N関係の予測

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  • Prediction of S-N Curves of a Notched Quasi-Isotropic Woven CFRP Laminate for Fatigue Loading at Different Stress Ratios

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Notched fatigue behavior a quasi-isotropic woven fabric CFRP laminate has been studied. Static and fatigue tests are performed on unnotched and center-hole coupon specimens for different stress ratios. The notched fatigue life of the plain woven CFRP laminates is predicted using the notched fatigue life prediction method that was developed in an earlier study. The values of fatigue life predicted using the model are compared with the fatigue lives observed in this study. The notched fatigue life of the plain woven CFRP laminates under the assumption of fatigue notch insensitivity agrees well with the experimental fatigue life observed, regardless of stress ratio, demonstrating the potential usefulness of the notched fatigue life prediction method for notched fatigue life prediction for the composite.

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