Definition of stress and strain ranges for multiaxial fatigue life evaluation under non-proportional loading

被引：0

作者：

机构：

[1] Div. of Mech. Eng., Graduate School of Engineering, Univ. of Fukui, Bunkyo, Fukui

[2] Dept. of Mech. Eng., Collage of Science and Engineering, Ritsumeikan Univ., Nojihigashi, Kusatsu

[3] Course of Mech. Eng., Graduate School of Engineering, Univ. of Fukui, Bunkyo, Fukui

来源：

Itoh, T. | 2013年 / Society of Materials Science Japan卷 / 62期

关键词：

Fatigue life evaluation; Low cycle fatigue; Multiaxial fatigue; Non-proportional loading; Stress and strain;

D O I：

10.2472/jsms.62.117

中图分类号：

学科分类号：

摘要：

A simple and clear method of evaluating stress and strain ranges under non-proportional multiaxial loading where principal directions of stress and strain are changed during a cycle is needed for assessing multiaxial fatigue. This paper proposes a simple method of determining the principal stress and strain ranges and the severity of non-prop ortional loading with defining the rotation angles of the maximum principal stress and strain in a three dimensional stress and strain space. Based on the method proposed, non-proportional stress and strain ranges are derived and applicability of the range to the life evaluation of type 304 stainless steel under 15 proportional and non-proportional strain paths are discussed. The strain range taking account of intensity of loading path reducing life can be suitable parameter for multiaxial fatigue life evaluation under non-proportional loading. © 2013 The Society of Materials Science, Japan.

引用

页码：117 / 124

页数：7

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