In-situ Pressure Measurements Using Raman Microspectroscopy in a Rolling Elastohydrodynamic Contact-Reference-Cited by-同舟云学术

In-situ Pressure Measurements Using Raman Microspectroscopy in a Rolling Elastohydrodynamic Contact

Published:2001-05-22 Issue:1 Volume:124 Page:114-120
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Jubault I.¹,Mansot J. L.¹,Vergne P.²,Mazuyer D.³

Affiliation:

1. Groupe de Technologie des Surfaces et Interfaces, Universite´ Antilles-Guyane, Pointe a` Pitre, Guadeloupe

2. Laboratoire de Me´canique des Contacts, UMR CNRS/INSA de Lyon 5514, Villeurbanne, France

3. Laboratoire de Tribologie et de Dynamique des Syste`mes, UMR CNRS 5513, Ecole Centrale de Lyon, Ecully, France

Abstract

The physical conditions (pressure, shear stress, temperature) generated in an elastohydrodynamic (EHD) contact are the main parameters governing the evolution of the physico-chemical properties of the lubricant within the contact. This paper presents in-situ measurements of pressure in an EHD point contact using Raman microspectroscopy. Two model lubricants are studied: a pure polyphenyl ether (5P4E) oil and a mixture of this oil with a liquid crystal. The influence of load and speed on the pressure distributions is investigated. The Petrusevich pressure spike is measured and its evolution with the operating parameters is in good agreement with the theoretical predictions. The addition of the liquid crystal to the base oil leads to an important diminution of the mixture viscosity, and consequently of the film thickness in the contact. The different rheological properties of the lubricants induce significant variations of the pressure profiles.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/124/1/114/5938820/114_1.pdf

Reference30 articles.

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3. Hamrock, B. J., and Dowson, D., 1976, “Isothermal Elastohydrodynamic Lubrication of Point Contacts, Part I: Theoretical Formulation,” ASME J. Lubr. Technol., 98, pp. 223–229.

4. Greenwood, J. A. , 1972, “An Extension of the Grubin Theory of Elastohydrodynamic Lubrication,” J. Phys. D, 5, pp. 2195–2211.

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