切欠効果の軽減に関する一研究
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概要
- 論文の詳細を見る
The strength of a shaft with keyways decreases considerably owing to the stress concentration at the bottoms of the grooves, when the shaft is subjected to reversal of stresses. While the endurance limit of a metal increases perceptively by suitable cold working. Accordingly, the decrease of the endurance limit due to stress concentration may be diminished, when the material at the bottoms of grooves is improved by cold working. Torsional fatigue tests have been done with this idea. The specimens used are somwhat different from serrated shafts of practical use and are those of diameter 16mm with two longitudinal grooves of 3mm depth, situated at symmetrical position. The bottoms of grooves were compressed by two rollers with the contours of the groove at their peripheries. Tests were done for two carbon steels of 0.29%C and 0.89%C, respectively. The results show that the torsional endurance limits for specimens of these metals increase in every case by about 30% due to suitable rolling at the bottoms of grooves.
- 一般社団法人日本機械学会の論文
- 1953-07-20