Multiaxial fatigue life prediction method of notched specimens considering stress gradient effect

doi:10.1111/ffe.13438

CORC > 兰州理工大学 > 兰州理工大学 > 机电工程学院

	Multiaxial fatigue life prediction method of notched specimens considering stress gradient effect
	Liu, Jianhui 1; Ran, Yong 1; Xie, Linjun 2; Xue, Wenzhuo 1
刊名	FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
	2021-02
卷号	44 期号:5 页码:-
关键词	Crack initiation Cracks Predictive analytics Shear flow Shear stress Stress analysis Critical plane method Effect of stress Equivalent stress Multiaxial fatigue life Multiaxial proportional loading Notched specimens Stress gradient Stress gradient effects
ISSN号	8756-758X
DOI	10.1111/ffe.13438
英文摘要	This paper investigates the effect of stress gradient on the fatigue life of U-notched specimens under multiaxial proportional loading by studying the shear stress gradient and normal stress gradient on the crack initiation plane separately. First, based on the energy method and critical plane method, an energy-critical plane method for determining the direction of crack initiation is proposed. Second, with the help of the concept of stress field intensity, the shear stress gradient and normal stress gradient on the critical plane are studied. Finally, a multiaxial fatigue life prediction model is established by combining the equivalent stress field intensity, composed of the shear stress field intensity and normal stress field intensity, with the Manson-Coffin equation. Theoretical analysis is verified by the experiments of Q345 steel notched specimens, and the results show that the predicted accuracy of the proposed method is not conservative and is superior to the local stress-strain method.
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	Blackwell Publishing Ltd
WOS记录号	WOS:000620065900001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147277]
专题	机电工程学院
通讯作者	Ran, Yong
作者单位	1.Lanzhou Univ Technol, Sch Mech & Elect Engn, 36 Pengjiaping Rd, Lanzhou, Gansu, Peoples R China; 2.Zhejiang Univ Technol, Coll Mech Engn, Hangzhou, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jianhui,Ran, Yong,Xie, Linjun,et al. Multiaxial fatigue life prediction method of notched specimens considering stress gradient effect[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,2021,44(5):-.
APA	Liu, Jianhui,Ran, Yong,Xie, Linjun,&Xue, Wenzhuo.(2021).Multiaxial fatigue life prediction method of notched specimens considering stress gradient effect.FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,44(5),-.
MLA	Liu, Jianhui,et al."Multiaxial fatigue life prediction method of notched specimens considering stress gradient effect".FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 44.5(2021):-.