Multiaxial fatigue life prediction for titanium alloy TC4 under proportional and nonproportional loading

被引：135

作者：

Wu, Zhi-Rong ^{[1
]}

Hu, Xu-Teng ^{[1
]}

Song, Ying-Dong ^{[1
,2
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Nanjing 210016, Jiangsu, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Jiangsu, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2014年 / 59卷

关键词：

Multiaxial fatigue; Life prediction; Critical plane approach; Nonproportional loading; Additional cyclic hardening;

D O I：

10.1016/j.ijfatigue.2013.08.028

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Both proportional and nonproportional tension-torsion fatigue tests were conducted on titanium alloy TC4 tubular specimens. Six multiaxial fatigue parameters are reviewed and evaluated with life data obtained in the tests. It is found that the effective strain, the maximum shear strain and the Smith-Watson-Topper (SWT) criteria tend to give non-conservative results under nonproportional loading. The shear strain-based critical plane approaches, especially Wu-Hu-Song (WHS) approach show better life prediction abilities. The prediction results based on WHS parameter are all within a factor of two scatter band of the test results. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：170 / 175

页数：6

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