疲労強度に及ぼす表面粗さの影響の定量的評価 : 粗さの深さとピッチの影響

概要

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In order to investigate the effect of surface roughness on fatigue strength, fatigue tests for a medium carbon steel, which was annealed and free of residual stress (HV≅170) and quenched and tempered (HV≅650). were carried out. To simulate the actual surface roughness, extremely shallow periodical notches with a constant pitch but irregular depth were introduced. The equivalent defect size √<area>_R for roughness was defined to evaluate the effect of irregularly shaped roughness using the √<area> parameter model. The fatigue limits of the annealed medium carbon steel specimens with artificial surface roughness are much higher than those of the specimen with a single notch because of the interference effect of notches. The fatigue limits predicted by the √<area> parameter model are in good agreement with the experimental results.
一般社団法人日本機械学会の論文
1997-08-25