重複繰返し応力に対する疲れ強さ : 二段三重重複の場合

概要

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The problems of the fatigue of materials have been studied by many investigators, but there still remain many unknown factors, especially on the damaging effects due to the repeated stress with varying amplitude. In this study, we carried out the fatigue tests on the medium carbon steel by superposing the higher stress reversals upon the fundamental repeated stress levels in order to discuss the process of fatigue stressing, and investigated the effect of the cycle ratio of the primary stress, the effect of the secondary higher stress level, and its reversals on the cumulative cycle ratio to failure. As a result, it has been found that the more the cycle ratio of the primary stress amplitude is and the lower the secondary stress level is, the greater the cumulative cycle ratio to failure amounts. Besides, we have interpreted these test results by the use of the cycle ratio-damage curves (D-R curves).
一般社団法人日本機械学会の論文
1960-01-25