Evaluation of fatigue strength on multiaxial notched specimenss considering failure probability

doi:10.1016/j.ijfatigue.2021.106649

IR > 机电工程学院

	Evaluation of fatigue strength on multiaxial notched specimenss considering failure probability
	Liu, Jianhui; Hua, Feilong; Lang, Shanshan; Ran, Yong; Zi, Rong
	2022-03
发表期刊	International Journal of Fatigue
ISSN	0142-1123
卷号	156
摘要	Based on the von-Mises criterion, the influence of stress gradient and additional strengthening effects on fatigue life are considered and a fatigue life prediction method suitable for notched specimens is established combining with Weibull distribution. Firstly, the maximum shear strain amplitude is defined as the damage parameter to determine the location of the critical plane, which can reflect the mechanism of crack initiation and propagation. Secondly, the equivalent stress gradient factor on the critical plane is obtained and the stress gradient influence index is introduced to characterize the degree of influence of the stress gradient. Finally, considering the effects of stress gradient and non-proportional additional strengthening, a new fatigue life prediction method is proposed based on the von-Mises criterion and the Weibull distribution, which can be used to obtain the fatigue life of multiaxial notched specimens under different failure probabilities. In order to verify the reliability of the proposed model, the prediction life using the proposed method, the SWT model, FS model and Manson-Coffin equation are compared with the experimental life of five materials (GH4169, TC4, Al7050, EN8, C40), and the compared results show that the accuracy of the proposed method is higher than that of the other three methods under proportional and non-proportional loading. Meanwhile, the P-S-N curves of multiaxial notched specimens with different failure probabilities are given and analysed. © 2021 Elsevier Ltd
关键词	Failure (mechanical) Fatigue of materials Forecasting Shear strain Critical plane method Failure Probability Fatigue life prediction Multiaxial Multiaxial notched specimen Non-proportional additional strengthening Notched specimens Stress gradient Stress gradient effects Von mises criterion
DOI	10.1016/j.ijfatigue.2021.106649
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000789651300001
出版者	Elsevier Ltd
EI入藏号	20214711202708
EI主题词	Weibull distribution
EI分类号	922.2 Mathematical Statistics ; 931.1 Mechanics ; 951 Materials Science
来源库	WOS
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/158060
专题	机电工程学院
通讯作者	Liu, Jianhui; Lang, Shanshan
作者单位	Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Liu, Jianhui,Hua, Feilong,Lang, Shanshan,et al. Evaluation of fatigue strength on multiaxial notched specimenss considering failure probability[J]. International Journal of Fatigue,2022,156.
APA	Liu, Jianhui,Hua, Feilong,Lang, Shanshan,Ran, Yong,&Zi, Rong.(2022).Evaluation of fatigue strength on multiaxial notched specimenss considering failure probability.International Journal of Fatigue,156.
MLA	Liu, Jianhui,et al."Evaluation of fatigue strength on multiaxial notched specimenss considering failure probability".International Journal of Fatigue 156(2022).