Estimation Method of Micropitting Life from S-N Curve Established by Residual Stress Measurements and Numerical Contact Analysis

Micropitting is a type of rolling contact fatigue (RCF) associated with rough surfaces and severe lubrication conditions. In the present study, we developed an estimation method for micropitting life. An S-N curve, which is a relationship between micropitting life and stresses acting in the region a...

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Autores principales:	Naoya Hasegawa, Takumi Fujita, Michimasa Uchidate, Masayoshi Abo, Hiroshi Kinoshita
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2019
Materias:	micropitting life estimation residual stress contact stress s-n curve boundary element method Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/08ab47f86e6244358b403f5401596163
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spelling	oai:doaj.org-article:08ab47f86e6244358b403f54015961632021-11-05T09:17:49ZEstimation Method of Micropitting Life from S-N Curve Established by Residual Stress Measurements and Numerical Contact Analysis1881-219810.2474/trol.14.131https://doaj.org/article/08ab47f86e6244358b403f54015961632019-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/14/3/14_131/_pdf/-char/enhttps://doaj.org/toc/1881-2198Micropitting is a type of rolling contact fatigue (RCF) associated with rough surfaces and severe lubrication conditions. In the present study, we developed an estimation method for micropitting life. An S-N curve, which is a relationship between micropitting life and stresses acting in the region affected by surface asperities (near-surface stress), is established by using data from RCF tests and estimated histories of near-surface stresses (stress history). Changes in the surface topography and residual stresses including the initial condition are measured in order to estimate the stress history. This enables us to consider the influences of surface topography and residual stresses on micropitting. Micropitting life under an arbitrary operating condition is estimated from the established S-N curve and the estimated stress history up to a finite cycle. It is revealed that micropitting life can be accurately estimated from the established S-N curve within the range of our experiment. The median, minimum, and maximum of the relative life ratio (ratio of actual micropitting life to the estimated life) were 0.89, 0.49, and 1.82, respectively. Further analysis confirms that the accuracy is improved by considering residual stresses.Naoya HasegawaTakumi FujitaMichimasa UchidateMasayoshi AboHiroshi KinoshitaJapanese Society of Tribologistsarticlemicropittinglife estimationresidual stresscontact stresss-n curveboundary element methodPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 14, Iss 3, Pp 131-142 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	micropitting life estimation residual stress contact stress s-n curve boundary element method Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	micropitting life estimation residual stress contact stress s-n curve boundary element method Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Naoya Hasegawa Takumi Fujita Michimasa Uchidate Masayoshi Abo Hiroshi Kinoshita Estimation Method of Micropitting Life from S-N Curve Established by Residual Stress Measurements and Numerical Contact Analysis
description	Micropitting is a type of rolling contact fatigue (RCF) associated with rough surfaces and severe lubrication conditions. In the present study, we developed an estimation method for micropitting life. An S-N curve, which is a relationship between micropitting life and stresses acting in the region affected by surface asperities (near-surface stress), is established by using data from RCF tests and estimated histories of near-surface stresses (stress history). Changes in the surface topography and residual stresses including the initial condition are measured in order to estimate the stress history. This enables us to consider the influences of surface topography and residual stresses on micropitting. Micropitting life under an arbitrary operating condition is estimated from the established S-N curve and the estimated stress history up to a finite cycle. It is revealed that micropitting life can be accurately estimated from the established S-N curve within the range of our experiment. The median, minimum, and maximum of the relative life ratio (ratio of actual micropitting life to the estimated life) were 0.89, 0.49, and 1.82, respectively. Further analysis confirms that the accuracy is improved by considering residual stresses.
format	article
author	Naoya Hasegawa Takumi Fujita Michimasa Uchidate Masayoshi Abo Hiroshi Kinoshita
author_facet	Naoya Hasegawa Takumi Fujita Michimasa Uchidate Masayoshi Abo Hiroshi Kinoshita
author_sort	Naoya Hasegawa
title	Estimation Method of Micropitting Life from S-N Curve Established by Residual Stress Measurements and Numerical Contact Analysis
title_short	Estimation Method of Micropitting Life from S-N Curve Established by Residual Stress Measurements and Numerical Contact Analysis
title_full	Estimation Method of Micropitting Life from S-N Curve Established by Residual Stress Measurements and Numerical Contact Analysis
title_fullStr	Estimation Method of Micropitting Life from S-N Curve Established by Residual Stress Measurements and Numerical Contact Analysis
title_full_unstemmed	Estimation Method of Micropitting Life from S-N Curve Established by Residual Stress Measurements and Numerical Contact Analysis
title_sort	estimation method of micropitting life from s-n curve established by residual stress measurements and numerical contact analysis
publisher	Japanese Society of Tribologists
publishDate	2019
url	https://doaj.org/article/08ab47f86e6244358b403f5401596163
work_keys_str_mv	AT naoyahasegawa estimationmethodofmicropittinglifefromsncurveestablishedbyresidualstressmeasurementsandnumericalcontactanalysis AT takumifujita estimationmethodofmicropittinglifefromsncurveestablishedbyresidualstressmeasurementsandnumericalcontactanalysis AT michimasauchidate estimationmethodofmicropittinglifefromsncurveestablishedbyresidualstressmeasurementsandnumericalcontactanalysis AT masayoshiabo estimationmethodofmicropittinglifefromsncurveestablishedbyresidualstressmeasurementsandnumericalcontactanalysis AT hiroshikinoshita estimationmethodofmicropittinglifefromsncurveestablishedbyresidualstressmeasurementsandnumericalcontactanalysis
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Estimation Method of Micropitting Life from S-N Curve Established by Residual Stress Measurements and Numerical Contact Analysis

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