Effect of stiff coatings on EHL film thickness in point contacts

Yuchuan Liu; Q Jane Wang; Dong Zhu

doi:10.1115/IJTC2007-44161

Effect of stiff coatings on EHL film thickness in point contacts

Yuchuan Liu^*, Q Jane Wang, Dong Zhu

^*Corresponding author for this work

Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

This study investigates the influences of coating material properties and coating thickness on lubricant film thickness based on a point-contact isothermal EHL model developed recently by the authors. The results present the trend of minimum film thickness variation as a function of coating thickness and elastic modulus under a wide range of working conditions. Numerical results indicates that the increase in minimum film thickness, I_max and the corresponding optimal dimensionless coating thickness, H₂, can be expressed in the following formulas I_max = 0.766M ^0.0248R₂^0.0296L^0.1379 exp(-0.0245 ln² L) H₂=0.049 M^0.4557 R₂- ^0.1722L^0.7611 exp(-0.0504ln² M - 0.0921 ln ² L) These formulas can be used to estimate the effect of a coating on EHL film thickness.

Original language	English (US)
Title of host publication	2007 Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2007
Pages	165-166
Number of pages	2
Volume	PART A
DOIs	https://doi.org/10.1115/IJTC2007-44161
State	Published - May 16 2008
Event	2007 ASME/STLE International Joint Tribology Conference, IJTC 2007 - San Diego, CA, United States Duration: Oct 22 2007 → Oct 24 2007

Other

Other	2007 ASME/STLE International Joint Tribology Conference, IJTC 2007
Country/Territory	United States
City	San Diego, CA
Period	10/22/07 → 10/24/07

ASJC Scopus subject areas

Mechanical Engineering
Surfaces, Coatings and Films
Condensed Matter Physics
Surfaces and Interfaces

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10.1115/IJTC2007-44161

Cite this

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title = "Effect of stiff coatings on EHL film thickness in point contacts",

abstract = "This study investigates the influences of coating material properties and coating thickness on lubricant film thickness based on a point-contact isothermal EHL model developed recently by the authors. The results present the trend of minimum film thickness variation as a function of coating thickness and elastic modulus under a wide range of working conditions. Numerical results indicates that the increase in minimum film thickness, Imax and the corresponding optimal dimensionless coating thickness, H2, can be expressed in the following formulas Imax = 0.766M 0.0248R20.0296L0.1379 exp(-0.0245 ln2 L) H2=0.049 M0.4557 R2- 0.1722L0.7611 exp(-0.0504ln2 M - 0.0921 ln 2 L) These formulas can be used to estimate the effect of a coating on EHL film thickness.",

author = "Yuchuan Liu and Wang, {Q Jane} and Dong Zhu",

year = "2008",

month = may,

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doi = "10.1115/IJTC2007-44161",

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volume = "PART A",

pages = "165--166",

booktitle = "2007 Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2007",

note = "2007 ASME/STLE International Joint Tribology Conference, IJTC 2007 ; Conference date: 22-10-2007 Through 24-10-2007",

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T1 - Effect of stiff coatings on EHL film thickness in point contacts

AU - Liu, Yuchuan

AU - Wang, Q Jane

AU - Zhu, Dong

PY - 2008/5/16

Y1 - 2008/5/16

N2 - This study investigates the influences of coating material properties and coating thickness on lubricant film thickness based on a point-contact isothermal EHL model developed recently by the authors. The results present the trend of minimum film thickness variation as a function of coating thickness and elastic modulus under a wide range of working conditions. Numerical results indicates that the increase in minimum film thickness, Imax and the corresponding optimal dimensionless coating thickness, H2, can be expressed in the following formulas Imax = 0.766M 0.0248R20.0296L0.1379 exp(-0.0245 ln2 L) H2=0.049 M0.4557 R2- 0.1722L0.7611 exp(-0.0504ln2 M - 0.0921 ln 2 L) These formulas can be used to estimate the effect of a coating on EHL film thickness.

AB - This study investigates the influences of coating material properties and coating thickness on lubricant film thickness based on a point-contact isothermal EHL model developed recently by the authors. The results present the trend of minimum film thickness variation as a function of coating thickness and elastic modulus under a wide range of working conditions. Numerical results indicates that the increase in minimum film thickness, Imax and the corresponding optimal dimensionless coating thickness, H2, can be expressed in the following formulas Imax = 0.766M 0.0248R20.0296L0.1379 exp(-0.0245 ln2 L) H2=0.049 M0.4557 R2- 0.1722L0.7611 exp(-0.0504ln2 M - 0.0921 ln 2 L) These formulas can be used to estimate the effect of a coating on EHL film thickness.

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VL - PART A

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BT - 2007 Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2007

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Y2 - 22 October 2007 through 24 October 2007

ER -

Effect of stiff coatings on EHL film thickness in point contacts

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