Multi-axial fatigue properties and life prediction under proportional and non-proportional loading at high temperature

被引：0

作者：

Wang, Jianguo ^{[1
]}

Liu, Lingling ^{[2
]}

Wang, Lianqing ^{[1
]}

Kang, Yonglin ^{[1
]}

Shang, Deguang ^{[3
]}

机构：

[1] State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

[2] Shijiazhuang Railway Institute, Shijiazhuang 050043, China

[3] College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China

来源：

Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | 2006年 / 28卷 / 05期

关键词：

Fatigue of materials - Fatigue testing - Forecasting - High temperature testing - Loading - Shear stress - Superalloys - Torsional stress;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The multiaxial fatigue behavior of the notched specimens and thin wall tube specimens of GH4169 super alloy was investigated. Symmetric axial-torsional strain was controlled in fatigue tests at a high temperature of 650°C by using a MTS 809 tension-torsional servo-controlled electro-hydraulic testing machine with proportional and non-proportional loading. The phases between axial strain and torsional strain were 0° in-phase (proportional) and 45°, 90° out-of-phase (non-proportional) respectively. Based on the critical approach, a model for multiaxial fatigue life prediction was established by combining maximum shear strain and normal strain on the critical plane, and the effect of stress state under the multiaxial cyclic loading condition on the fatigue life was taken into account. The results of life prediction show that the new fatigue life prediction model is validated with the experimental.

引用

页码：448 / 453

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