ガラスマットFRPの低サイクル疲労強度の温度依存性に関する統計的考察

概要

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Low-cycle tensile fatigue tests for glass-mat FRP were performed at low (-20℃), intermediate (room temperature and 60℃) and high (100℃) temperatures. The scatter of fatigue life data was considerably large in spite of the fact that the scatter of static tensile strength was comparatively small. As the results of statistical analysis based on the stress-median life diagram, it was found that one regression line intersecting at about 100% of stress level is obtained for low and intermediate temperature levels when the stress amplitude is standardized by the static strength measured in each temperature, while the median life data at 100℃ fit well to another regression line with approximately the same slope located at the lower stress level by about 12%. This result suggests that the temperature effect on the low-cycle fatigue strength of glass-mat FRP at the high temperature is more remarkable than that at low and intermediate temperatures in comparison with the case of static strength.
社団法人日本機械学会の論文
1986-12-25