多数微小欠陥を有する丸棒および平板試験片の疲労寿命分布に関する一研究

概要

論文の詳細を見る
Structural metallic materials usually have various types of defects such as inclusions, grain boundaries and mechanical notches. These defects shorten the fatigue life of the material. In this study, the fatigue life distribution of a specimen having many defects was derived from the original fatigue life distribution of a specimen having only one defect by applying a concept of the extremes distribution. The qualitative trend of the experimental results was well explained by this analytical model, but the quantitative effect of the number of defects was not successfully evaluated. In order to overcome this difficulty, the effective factor ξ of the defect number was introduced into the formulation of the fatigue life distribution of the specimen having any number of defects. Analytical results thus obtained were in good agreement with the experimental results of fatigue life distribution characteristics.
一般社団法人日本機械学会の論文
1994-12-25