Probabilistic fatigue evaluation of notched specimens considering small sample properties under multiaxial loading

doi:10.1016/j.tafmec.2024.104316

IR > 机电工程学院

	Probabilistic fatigue evaluation of notched specimens considering small sample properties under multiaxial loading
	He, Yingbao 1; Liu, Jianhui1 ; Lu, Jumei 1; Wang, Jie 1; Feng, Ruicheng1 ; Ren, Junqiang2
	2024-04
在线发表时间	2024-02
发表期刊	Theoretical and Applied Fracture Mechanics
ISSN	0167-8442
卷号	130
摘要	Probabilistic fatigue evaluation is the key to ensure the service integrity of large-sized mechanical equipment, but in practical engineering, the probabilistic fatigue models coupled with multiaxial stress conditions and small sample information characteristics are still insufficient. Accordingly, the virtual subsample augmentation method is effectively coupled with the improved Bootstrap method to propose a general probabilistic fatigue evaluation process. Specifically, the random sample regeneration method is first used to expand the small sample fatigue data, and then life distribution information under different stress levels is fused based on the backwards statistical inference method, the P-S-N curve is fitted with the integrated life dispersion information. Secondly, a new fatigue damage parameter based on the inhibition function is proposed to modify the P-S-N curve and predict fatigue life. Meantime, the multiaxial fatigue test of Q355(D) alloy steel with different notch sizes is carried out, and the model is verified in conjunction with existing fatigue test data of TC4-DT alloy and TC4 alloy. The results show that the proposed model has a certain universality for notched specimens, the modified stress field intensity method can accurately characterize the impact of notch and size effects on fatigue damage of specimens. © 2024 Elsevier Ltd
关键词	Alloy steel Fatigue testing Function evaluation Statistical methods Backward statistical inference method Fatigue analysis Inference methods Inhibition function Probabilistic fatigue Probabilistic fatigue analyse Self-constrained field radius Small sample expansion Small samples Statistical inference
DOI	10.1016/j.tafmec.2024.104316
收录类别	EI ; SCIE
语种	英语
资助项目	National Natural Science Foundation of China [52365016]; Gansu Province Young Doctor Fund Project [2023QB-030]; Lanzhou University of Technology Graduate Research Exploration Project; Innovation and Entrepreneurship Talent Project of Lanzhou [2021-RC-23]
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
WOS记录号	WOS:001195992600001
出版者	Elsevier B.V.
EI入藏号	20240815608906
EI主题词	Fatigue damage
EI分类号	531.1 Metallurgy ; 545.3 Steel ; 921.6 Numerical Methods ; 922.2 Mathematical Statistics ; 951 Materials Science
原始文献类型	Journal article (JA)
EISSN	1872-7638
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/169982
专题	机电工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Liu, Jianhui
作者单位	1.School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, 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	He, Yingbao,Liu, Jianhui,Lu, Jumei,et al. Probabilistic fatigue evaluation of notched specimens considering small sample properties under multiaxial loading[J]. Theoretical and Applied Fracture Mechanics,2024,130.
APA	He, Yingbao,Liu, Jianhui,Lu, Jumei,Wang, Jie,Feng, Ruicheng,&Ren, Junqiang.(2024).Probabilistic fatigue evaluation of notched specimens considering small sample properties under multiaxial loading.Theoretical and Applied Fracture Mechanics,130.
MLA	He, Yingbao,et al."Probabilistic fatigue evaluation of notched specimens considering small sample properties under multiaxial loading".Theoretical and Applied Fracture Mechanics 130(2024).