A Two-point Method for Multiaxial Fatigue Life Prediction

doi:10.1007/s10338-021-00287-z

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	A Two-point Method for Multiaxial Fatigue Life Prediction
	Liu, Jianhui 1; Pan, Xuemei 1; Li, Youtang 1; Chen, Xiaochuang 2
刊名	ACTA MECHANICA SOLIDA SINICA
	2022
卷号	35 期号:2 页码:316-327
关键词	Multiaxial fatigue Stress gradient Life prediction Critical distance method Local stress-strain method
ISSN号	0894-9166
DOI	10.1007/s10338-021-00287-z
英文摘要	Fatigue fracture is one of the most common failure modes of engineering components, and the combined action of geometric discontinuity and multiaxial loading is more likely to cause severe fatigue damage of components. This work focuses on the fatigue behavior of U-notched Q345 steel specimens with different notch sizes under proportional cyclic tension-torsion. Firstly, based on the concept of strain energy, the calculation method of critical plane is given and the equivalent stress of the specified path on the critical plane is extracted to characterize the equivalent stress distribution state and the stress gradient effect. Then, based on the high stress volume method and theory of critical distance, a simple method for determining the critical distance is given considering the contribution of stress at the dangerous point and the critical point. In addition, based on the idea of stress-distance normalization, a new stress gradient impact factor is defined and a new method for predicting the multiaxial fatigue life of notched specimens is given. The prediction results of the proposed model, the local stress-strain method and the point method of theory of critical distance are compared with the experimental results. The comparisons show that the prediction results of the proposed model are closer to experimental life, and the calculation accuracy is higher.
WOS研究方向	Materials Science ; Mechanics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000741880600002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/154857]
专题	机电工程学院学报编辑部
作者单位	1.Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Peoples R China; 2.Lanzhou Jinchuan Adv Mat Technol Co Ltd, Lanzhou 730101, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jianhui,Pan, Xuemei,Li, Youtang,et al. A Two-point Method for Multiaxial Fatigue Life Prediction[J]. ACTA MECHANICA SOLIDA SINICA,2022,35(2):316-327.
APA	Liu, Jianhui,Pan, Xuemei,Li, Youtang,&Chen, Xiaochuang.(2022).A Two-point Method for Multiaxial Fatigue Life Prediction.ACTA MECHANICA SOLIDA SINICA,35(2),316-327.
MLA	Liu, Jianhui,et al."A Two-point Method for Multiaxial Fatigue Life Prediction".ACTA MECHANICA SOLIDA SINICA 35.2(2022):316-327.