金属材料の高温における動クリープおよび疲労 : 高温強度特集号

概要

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The analysis by the author, which aims to predict the dynamic creep and fatigue strength from the information of static creep test, is presented in a summarized form and discussed in comparison with the experimental results for various metallic materials. The analysis is classified into the following four categories : (a) Dynamic creep rupture: In the case of the dynamic stress with small stress ratio (ratio of alternating stress to mean stress), rupture strength can be estimated from static creep rupture data by analysing on the basis of the idea of cummulative creep damage. In conducting the analysis, the equivalent static stress, which yield the same rupture life as the dynamic stress, has been determined as [numerical formula] where σ_m, A, t and ω are mean stress, stress ratio, time and frequency of alternating stress, respectively, and α_s is a constant which is obtained as the inclination of log-log plots of stress vs. rupture time diagram of the static creep rupture test.
社団法人日本材料学会の論文
1962-03-15