Multiaxial fatigue life prediction method considering notch effect and non-proportional hardening

doi:10.1016/j.engfailanal.2022.106202

CORC > 兰州理工大学 > 兰州理工大学 > 机电工程学院

	Multiaxial fatigue life prediction method considering notch effect and non-proportional hardening
	Ran, Yong 1; Liu, Jianhui 1; Xie, Linjun 2
刊名	Engineering Failure Analysis
	2022-06-01
卷号	136
关键词	Fatigue of materials Hardening Stress concentration Welds Fatigue life prediction Field intensity Life predictions Multiaxial fatigue life NON-proportional hardening Notched effect Stress field Stress field intensity approach The critical plane method
ISSN号	1350-6307
DOI	10.1016/j.engfailanal.2022.106202
英文摘要	Engineering components with geometric discontinuous structures generally appear notch effect, which might eventually induce fatigue failure. In this study, a novel multiaxial fatigue prediction model is established for notched components by incorporating the notch effect and non-proportional hardening. Firstly, according to the notch effect, a computational procure of damage parameters is presented by combining the notion of stress intensity with finite element simulations based on the critical plane method. Secondly, considering the non-proportional hardening effect of path modes and material properties, a new modified non-proportional hardening factor is proposed. Particularly, the relationship between the relative stress gradient and the fatigue life is investigated under different stress concentration factors. Finally, with the help of the Manson-Coffin equation, a multiaxial fatigue life prediction model is developed subjected to multiaxial proportional/non-proportional loadings. Experimental data of medium steel En8 and GH4169 alloys are utilized to evaluate and validate the proposed model as well as four other classical models (FS model, MSWT model, Yu model and CXH model). The result indicates that the proposed model yields a higher accuracy on multiaxial fatigue life than other four models, and the majority of prediction results are within the ±2 life factor. © 2022 Elsevier Ltd
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000802126500003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157907]
专题	机电工程学院
作者单位	1.School of Mechanical & Electronical Engineering, LanZhou University of Technology, Gansu, Lanzhou, China; 2.College of Mechanical Engineering, Zhejiang University of Technology, Zhengjiang, Hangzhou, China
推荐引用方式 GB/T 7714	Ran, Yong,Liu, Jianhui,Xie, Linjun. Multiaxial fatigue life prediction method considering notch effect and non-proportional hardening[J]. Engineering Failure Analysis,2022,136.
APA	Ran, Yong,Liu, Jianhui,&Xie, Linjun.(2022).Multiaxial fatigue life prediction method considering notch effect and non-proportional hardening.Engineering Failure Analysis,136.
MLA	Ran, Yong,et al."Multiaxial fatigue life prediction method considering notch effect and non-proportional hardening".Engineering Failure Analysis 136(2022).