一方向CFRPの非主軸切欠き疲労強度の温度依存性とそのモデル化

抄録

Effect of temperature on notched off-axis fatigue behavior of CFRP laminates has been studied. Static and fatigue tests are performed at different temperatures on unnotched (UN) and center-hole (CH) coupon specimens of unidirectional CFRP laminates for different fiber orientations as well as for different stress ratios. The notched off-axis fatigue life of the unidirectional CFRP laminate at difference temperatures is predicted using the notched fatigue life prediction method that was started to develop in an earlier study on the notched off-axis fatigue life of unidirectional CFRP laminates at room temperature. The values of fatigue life predicted using the method are compared with the fatigue lives observed in this study. The predicted off-axis notched fatigue life of unidirectional CFRP laminates agrees well with the experimental fatigue life, demonstrating the potential usefulness of the model for prediction of notched fatigue life of unidirectional composites at high temperature.