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A Method for Predicting the Effects of Specimen Geometry and Loading Condition on Fatigue Strength
Sun CQ(孙成奇); Song QY
发表期刊METALS
2018-10-01
卷号8期号:10页码:Ar-811
ISSN2075-4701
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.
关键词notch effect size effect loading condition fatigue strength control volume titanium alloy
DOI10.3390/met8100811
URL查看原文
收录类别SCI
语种英语
WOS记录号WOS:000448658700075
关键词[WOS]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
WOS类目Materials Science ; Metallurgy & Metallurgical Engineering
项目资助者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]
论文分区二类
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/78167
专题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.
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