Local strain estimation method for low- and high-cycle fatigue strength evaluation

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• 作者：Kawin Saiprasertkit^a ; ^{saiprasertkit.k.aa@m.titech.ac.jp} ; Takeshi Hanji^b ; ¹ ; ^{hanji@civil.nagoya-u.ac.jp} ; Chitoshi Miki^a ; ² ; ^{miki@cv.titech.ac.jp}
• 关键词：Load-carrying cruciform joints ; Effective notch strain ; Low- and high-cycle fatigue strength
• 刊名：International Journal of Fatigue
• 出版年：2012
• 期刊代码：79_01421123
• 类别：et
• 出版时间：July, 2012
• 卷：40
• 期：Complete
• 页码：1-6
• 文件大小：796 K

摘要

The authors previously proposed a fatigue strength evaluation method based on the effective notch strain concept and reported that the fatigue strength of load-carrying cruciform joints can be assessed by the effective notch strain regardless of the mismatching and the incomplete penetration ratio from the low- to the high-cycle fatigue region. However, in applications to actual structures, this method has difficulty in modeling and analysis because it requires extremely fine meshing around the welds. Therefore, in this paper, an estimation method of the effective notch strain from nominal strain is proposed.