Critical plane-based fatigue life model under multiaxial random loading

doi:10.1108/IJSI-06-2022-0083

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	Critical plane-based fatigue life model under multiaxial random loading
	Wang, Jie; Liu, Jianhui; Hua, Feilon; He, Yingbao; Wang, Xuexue
刊名	International Journal of Structural Integrity
	2022-09-12
卷号	13 期号:5 页码:845-856
关键词	Fatigue damage Forecasting Hardening Titanium alloys Additional hardening Critical plane method Critical planes Cycle counting Fatigue life prediction Life predictions Multiaxial Random load Random loading Strain cycles
ISSN号	1757-9864
DOI	10.1108/IJSI-06-2022-0083
英文摘要	Purpose: Engineering components/structures are usually subjected to complex and variable loads, which result in random multiaxial stress/strain states. However, fatigue analysis methods under constant loads cannot be directly applied to fatigue life prediction analysis under random loads. Therefore, the purpose of this study is how to effectively evaluate fatigue life under multiaxial random loading. Design/methodology/approach: First, the average phase difference is characterized as the ratio of the number of shear strain cycles to the number of normal strain cycles, and the new non-proportional additional hardening factor is proposed. Then, the determined random typical load spectrum is processed into a simple variable amplitude load spectrum, and the damage in each plane is calculated according to the multiaxial fatigue life prediction model and Miner theory. Meanwhile, the cumulative damage can be calculated separately by projection method. Finally, the maximum projected cumulative damage plane is defined as the critical plane of multiaxial random fatigue. Findings: The fatigue life prediction capability of the method is verified based on test data of TC4 titanium alloy under random multiaxial loading. Most of the predicting results are within double scatter bands. Originality/value: The objective of this study is to provide a reference for the determination of critical plane and non-proportional additional hardening factor under multiaxial random loading, and to promote the development of multiaxial fatigue from experimental studies to practical engineering applications. © 2022, Emerald Publishing Limited.
WOS研究方向	Engineering
语种	英语
出版者	Emerald Publishing
WOS记录号	WOS:000835773200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159724]
专题	机电工程学院
作者单位	School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou, China
推荐引用方式 GB/T 7714	Wang, Jie,Liu, Jianhui,Hua, Feilon,et al. Critical plane-based fatigue life model under multiaxial random loading[J]. International Journal of Structural Integrity,2022,13(5):845-856.
APA	Wang, Jie,Liu, Jianhui,Hua, Feilon,He, Yingbao,&Wang, Xuexue.(2022).Critical plane-based fatigue life model under multiaxial random loading.International Journal of Structural Integrity,13(5),845-856.
MLA	Wang, Jie,et al."Critical plane-based fatigue life model under multiaxial random loading".International Journal of Structural Integrity 13.5(2022):845-856.