A prediction method for fatigue life of large moving components as function of scale factor: A case of motor-generator rotor

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	A prediction method for fatigue life of large moving components as function of scale factor: A case of motor-generator rotor
	Pan, L; Pang, JC; Zhang, MX; Xie, YJ; Nie, LL; Mao, YX; Chen, M; Zhang, ZF; Zhang, ZF (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
刊名	FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
	2018-05-01
卷号	41 期号:5 页码:1089-1101
关键词	Finite-element-analysis Metallic Materials High-cycle Notched Components Fracture-mechanics Surface-roughness Strength Size Stress Initiation
ISSN号	8756-758X
英文摘要	With the development of science and technology, more and more large moving components have been used in industry, and their service lives have become an important issue. After analysis of the previous results, considering the scale factor, a prediction method for fatigue life of large moving components based on the Basquin relation was proposed at first, and then the magnet pole part of motor-generator rotor was chosen to make simulation parts with different scale factors mainly in terms of their S-N curves and fractographies. It was found that with the change of specimen scale factor, the stress concentration factor at transition arc is almost unchanged as well as the fatigue strength exponent, and the fatigue strength coefficient changes linearly. Based on those results, a life prediction method was validated, and the results show that this method is a simple but more precise relation. After fatigue fracture surface and crack growth angle observations and quantitative analyses, the fatigue damage mechanisms associated with the relation among fatigue strength exponent and coefficient and scale factors were explained well. Those studies will provide a new clue to the prediction of the service life for those large moving components.; With the development of science and technology, more and more large moving components have been used in industry, and their service lives have become an important issue. After analysis of the previous results, considering the scale factor, a prediction method for fatigue life of large moving components based on the Basquin relation was proposed at first, and then the magnet pole part of motor-generator rotor was chosen to make simulation parts with different scale factors mainly in terms of their S-N curves and fractographies. It was found that with the change of specimen scale factor, the stress concentration factor at transition arc is almost unchanged as well as the fatigue strength exponent, and the fatigue strength coefficient changes linearly. Based on those results, a life prediction method was validated, and the results show that this method is a simple but more precise relation. After fatigue fracture surface and crack growth angle observations and quantitative analyses, the fatigue damage mechanisms associated with the relation among fatigue strength exponent and coefficient and scale factors were explained well. Those studies will provide a new clue to the prediction of the service life for those large moving components.
学科主题	Engineering, Mechanical ; Materials Science, Multidisciplinary
语种	英语
资助机构	National Natural Science Foundation of China [51331007]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79343]
专题	金属研究所_中国科学院金属研究所
通讯作者	Pang, JC; Zhang, ZF (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Pan, L,Pang, JC,Zhang, MX,et al. A prediction method for fatigue life of large moving components as function of scale factor: A case of motor-generator rotor[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,2018,41(5):1089-1101.
APA	Pan, L.,Pang, JC.,Zhang, MX.,Xie, YJ.,Nie, LL.,...&Zhang, ZF .(2018).A prediction method for fatigue life of large moving components as function of scale factor: A case of motor-generator rotor.FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,41(5),1089-1101.
MLA	Pan, L,et al."A prediction method for fatigue life of large moving components as function of scale factor: A case of motor-generator rotor".FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 41.5(2018):1089-1101.