Proposition of Thermal-Diffusion-Induced Spiral Model for the Rapid Oil-Film Breakdown Process during Scuffing

The dominant factors and processes for the rapid progression of scuffing from a partial area to an entire surface under lubricated, plane contact, and pure sliding conditions were studied by performing an in situ observation of the surface, and in situ measurements of the oil-film thickness and temp...

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Autores principales:	Mamoru Tohyama, Takashi Izumi, Shuzo Sanda
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2021
Materias:	scuffing oil-film film thickness in situ observation frictional heat thermal diffusion 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/abb1762dfd3d43f9835ba5eb917c649b
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id	oai:doaj.org-article:abb1762dfd3d43f9835ba5eb917c649b
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spelling	oai:doaj.org-article:abb1762dfd3d43f9835ba5eb917c649b2021-11-05T09:31:04ZProposition of Thermal-Diffusion-Induced Spiral Model for the Rapid Oil-Film Breakdown Process during Scuffing1881-219810.2474/trol.16.89https://doaj.org/article/abb1762dfd3d43f9835ba5eb917c649b2021-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/16/2/16_89/_pdf/-char/enhttps://doaj.org/toc/1881-2198The dominant factors and processes for the rapid progression of scuffing from a partial area to an entire surface under lubricated, plane contact, and pure sliding conditions were studied by performing an in situ observation of the surface, and in situ measurements of the oil-film thickness and temperature distributions during scuffing. Transitions of the oil-film thickness were measured using three-wavelength optical interferometry, and the temperature distributions of the sliding surface were measured using thermography. It was observed that oil-film breakdown progressed from a partial area to an entire surface within several tens of milliseconds under high sliding speed and high-load conditions. The proposed process of the rapid progression of oil-film breakdown on the surface was described using the "thermal-diffusion-induced spiral model." The processes in the model are as follows: (I) the frictional heat generated in a solid contact area diffused into the adjacent region of the surface; (II) the oil-film temperature in the adjacent region increased within a short time, as the films were very thin (several tens of nanometers); (III) the viscosities of the oil-films decreased; (IV) the solid contact area grew larger, and these phenomena repeated continuously until the oil-film breakdown reached the entire surface.Mamoru TohyamaTakashi IzumiShuzo SandaJapanese Society of Tribologistsarticlescuffingoil-filmfilm thicknessin situ observationfrictional heatthermal diffusionPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 16, Iss 2, Pp 89-98 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	scuffing oil-film film thickness in situ observation frictional heat thermal diffusion Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	scuffing oil-film film thickness in situ observation frictional heat thermal diffusion Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Mamoru Tohyama Takashi Izumi Shuzo Sanda Proposition of Thermal-Diffusion-Induced Spiral Model for the Rapid Oil-Film Breakdown Process during Scuffing
description	The dominant factors and processes for the rapid progression of scuffing from a partial area to an entire surface under lubricated, plane contact, and pure sliding conditions were studied by performing an in situ observation of the surface, and in situ measurements of the oil-film thickness and temperature distributions during scuffing. Transitions of the oil-film thickness were measured using three-wavelength optical interferometry, and the temperature distributions of the sliding surface were measured using thermography. It was observed that oil-film breakdown progressed from a partial area to an entire surface within several tens of milliseconds under high sliding speed and high-load conditions. The proposed process of the rapid progression of oil-film breakdown on the surface was described using the "thermal-diffusion-induced spiral model." The processes in the model are as follows: (I) the frictional heat generated in a solid contact area diffused into the adjacent region of the surface; (II) the oil-film temperature in the adjacent region increased within a short time, as the films were very thin (several tens of nanometers); (III) the viscosities of the oil-films decreased; (IV) the solid contact area grew larger, and these phenomena repeated continuously until the oil-film breakdown reached the entire surface.
format	article
author	Mamoru Tohyama Takashi Izumi Shuzo Sanda
author_facet	Mamoru Tohyama Takashi Izumi Shuzo Sanda
author_sort	Mamoru Tohyama
title	Proposition of Thermal-Diffusion-Induced Spiral Model for the Rapid Oil-Film Breakdown Process during Scuffing
title_short	Proposition of Thermal-Diffusion-Induced Spiral Model for the Rapid Oil-Film Breakdown Process during Scuffing
title_full	Proposition of Thermal-Diffusion-Induced Spiral Model for the Rapid Oil-Film Breakdown Process during Scuffing
title_fullStr	Proposition of Thermal-Diffusion-Induced Spiral Model for the Rapid Oil-Film Breakdown Process during Scuffing
title_full_unstemmed	Proposition of Thermal-Diffusion-Induced Spiral Model for the Rapid Oil-Film Breakdown Process during Scuffing
title_sort	proposition of thermal-diffusion-induced spiral model for the rapid oil-film breakdown process during scuffing
publisher	Japanese Society of Tribologists
publishDate	2021
url	https://doaj.org/article/abb1762dfd3d43f9835ba5eb917c649b
work_keys_str_mv	AT mamorutohyama propositionofthermaldiffusioninducedspiralmodelfortherapidoilfilmbreakdownprocessduringscuffing AT takashiizumi propositionofthermaldiffusioninducedspiralmodelfortherapidoilfilmbreakdownprocessduringscuffing AT shuzosanda propositionofthermaldiffusioninducedspiralmodelfortherapidoilfilmbreakdownprocessduringscuffing
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Proposition of Thermal-Diffusion-Induced Spiral Model for the Rapid Oil-Film Breakdown Process during Scuffing

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