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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.
2018-05-01
Source PublicationFATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
ISSN8756-758X
Volume41Issue:5Pages:1089-1101
AbstractWith 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.
description.department[pan, l. ; xie, y. j.] liaoning shihua univ, dept mech engn, 1 dandong rd, fushun 113001, peoples r china ; [pan, l. ; pang, j. c. ; zhang, m. x. ; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [nie, l. l. ; mao, y. x. ; chen, m.] china southern power grid, power generat co, 32 longkou east rd, guangzhou 510630, guangdong, peoples r china
KeywordFinite-element-analysis Metallic Materials High-cycle Notched Components Fracture-mechanics Surface-roughness Strength Size Stress Initiation
Subject AreaEngineering, Mechanical ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China [51331007]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79343
Collection中国科学院金属研究所
Corresponding AuthorPang, 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.
Recommended Citation
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.
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