機械構造用鋼の応力-ひずみヒステリシス・ループと繰返し応力-ひずみ曲線に関する結晶塑性的解析 : 第2報, 解析結果とその低サイクル疲労寿命推定への応用

概要

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The stress-strain hysteresis loops and the cyclic stress-strain curves of structural steels for machine components were estimated through the use of analytical equations proposed in the previous report. The analysis on the loop profile describes well the Bauschinger effect which inherently appears in the cyclic deformation. The cyclic stress-strain curve calculated under the incremental step test condition was in quite good agreement with the test results, and that for the companion specimens method left some problems to be discussed only in the extremely low strain range. Moreover, the analyses on the hysteresis loops were successfully applied to predict the low cycle fatigue life curves plotted against a plastic strain range. Thus, the proposed analysis seems to make it possible to estimate the cyclic stress-strain curves and the low cycle fatigue lives to steels, using only the yield stress and the work hardening exponent in a static tension.
一般社団法人日本機械学会の論文
1986-08-25