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反覆굽힘荷重下의 Unnotched & Notched 試片의 스프링平鋼에 對한 疲勞强度에 關한 硏究
朴卿東 國立釜山工業專門學校 1975 論文集 Vol.15 No.-
The author has Studied about the effect of fatigue limit about the spring flat plate steel under the repeat bending load, Above all, I have extensively discussed the notched specimen and unnotched specimen. The Content of this study is as follow. (1) After testing the unnotched specimen and the notched specimen of U form's. I have examined the fatigue limit, I have made the radious of notch in 0.5mm, 1mm, 2mm, 4mm, and 8mm. (2) I have discussed the ftigue limit about U form's notched specimen and O hole form's specimen. (3) I have examined mechanical properties after tension test about annealed specimen and tempered specimen. The specimen that used in this study is spring flat plate steel. (4) I have discussed the notch constant about U form's notched specimen and O hole form's specinen.