A Method for Predicting the Effects of Specimen Geometry and Loading Condition on Fatigue Strength

doi:10.3390/met8100811

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	A Method for Predicting the Effects of Specimen Geometry and Loading Condition on Fatigue Strength
	Sun CQ(孙成奇); Song QY
刊名	METALS
	2018-10-01
卷号	8 期号:10 页码:Ar-811
关键词	notch effect size effect loading condition fatigue strength control volume titanium alloy
ISSN号	2075-4701
DOI	10.3390/met8100811
英文摘要	Specimen geometry and loading condition usually have a great influence on the fatigue strength of metallic materials, which is an important issue in evaluating the reliability of component parts. In this paper, a rotating bending fatigue test is performed at first on an hourglass specimen and a notch specimen of a high strength titanium alloy. Experimental results indicate that, in terms of local stress, the notch specimen endures higher fatigue strength in comparison with the hourglass specimen due to its relatively smaller control volume. Then, a probabilistic control volume method is proposed for correlating the effects of specimen geometry and loading condition on the fatigue strength based on Weibull distribution and the concept of control volume. A simple formula is obtained for the fatigue strength in relation to control volumes, in which the parameter is the shape parameter of Weibull distribution of fatigue strength. The predicted results are in good agreement with the present experimental data for high strength titanium alloy and the data for the high strength steel and the full scale EA4T axle in the literature.
分类号	二类
URL标识	查看原文
WOS关键词	RAILWAY AXLES ; WEAKEST-LINK ; DAMAGE CALCULATIONS ; GIGACYCLE FATIGUE ; HIGH-CYCLE ; SIZE ; STEEL ; NOTCH ; LIMIT ; COMPONENTS
WOS研究方向	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000448658700075
资助机构	National Key Research and Development Program of China "Genera Design, Construction and Sea Trial of Full Ocean Deep Manned Submersible" [2016YFC0300600] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040503, XDB22020201, XDB22020200]
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/78167]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Sun CQ,Song QY. A Method for Predicting the Effects of Specimen Geometry and Loading Condition on Fatigue Strength[J]. METALS,2018,8(10):Ar-811.
APA	孙成奇,&Song QY.(2018).A Method for Predicting the Effects of Specimen Geometry and Loading Condition on Fatigue Strength.METALS,8(10),Ar-811.
MLA	孙成奇,et al."A Method for Predicting the Effects of Specimen Geometry and Loading Condition on Fatigue Strength".METALS 8.10(2018):Ar-811.