加工硬化した鋼材の疲勞(第7報)

概要

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The Ono type rotational bending fatigue limits are shown about two groups of usual carbon steel specimens. The first group were deformed by statical torsional shear strain of 3.5 to 21% before bending fatigue. The second group were deformed by statical torsion after statical tensile deformation (or vice versa). Comparing with the annealed state, the fatigue limit of the first falls about 6% for small strain, and rises about 4% for large strain. This tendency is similar to that obtained for specimens after plastically deformed by tension, or compressive deformation, that is, affected by the work hardening only (shown in 2nd report). Thus, the effect of residual stress upon the fatigue limit can not be found. Arranging the experimental results by sum of the octahedral shear strain for preworking tension and torsion, the fatigue limits of the second group coinside with that obtained by the first.
宇宙航空研究開発機構の論文
1953-08-31