複雑な表面性状が疲労限度信頼性に及ぼす影響のメゾ特性からの定量的評価 : 第2報,疲労限度信頼性の予測法の提案と軸対称の表面粗さ問題への応用

概要

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In this paper, a method to predict the fatigue limit reliability of specimens with various surface roughness is proposed. First, the mechanical profile for fatigue limit is proposed. This is obtained from the ineffective crack length. Then the equivalent notch depth is proposed to treat a rough surface as a smooth surface with a notch. Next, a method to predict the fatigue limit reliability is discussed. As the surface roughness is expressed with the spectrum analysis, computational simulation is used to produce surface profiles. And stress analysis described in the first report is carried out for each specimen. Then a fatigue limit of an arbitrary metal specimen with an arbitrary small notch can be estimated. Moreover, rotating bending fatigue tests of 0.1% carbon steel with a complex surface are carried out. Then the experimental fatigue limit data is compared with the present estimated values. As results, the validity of the present meso-analysis is examined.
一般社団法人日本機械学会の論文
2003-08-25