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Research Papers: Contact Mechanics

Thermal Study of the Dry Sliding Contact With Third Body Presence

[+] Author and Article Information
David Richard, Mathieu Renouf, Yves Berthier

Laboratoire de Mécanique des Contacts et des Structures, INSA-Lyon, CNRS, UMR 5259, F69621, Villeurbanne, France

Ivan Iordanoff

Laboratoire Matériaux Endommagement Fiabilité et Ingénierie des Procédés, ENSAM Université, Bordeaux 1, Equipe d’accueil 27 27, Esplanade des Arts et Métiers, 33405, Talence, France

J. Tribol 130(3), 031404 (Jun 23, 2008) (10 pages) doi:10.1115/1.2913540 History: Received October 05, 2007; Revised March 25, 2008; Published June 23, 2008

When the thermal aspect of sliding contacts is investigated, few models take into account the presence of a third body at the contact interface. Moreover, when the presence of the third body is considered, its rheology is neglected. For this reason, the thermal study of such contact configuration is not fully understood and relies on strong hypothesis or even important simplifications. To fill this lack of knowledge, a thermal model has been developed embedded in a discrete element scheme. Such investigations highlight the key role played by both thermal and mechanical properties of the contact elements. If the third body rheology can affect the localization of the heat generation leading to important thermal asymmetries, the diffusive nature of the first bodies can also strongly control the phenomenon and accentuate or diminish the initial differences of surfaces temperature for the contacting volumes. The goal of this paper is to bring information or complete existing theories (Blok, H. A., 1937, “Theoretical Study of Temperature Rise at Surface at Actual Contact Under Oilness Lubricating Conditions  ,” I. Mech. E. Conf. Publ., 2, pp. 222–235;Ryhming, I. L., 1979, “On Temperature and Heat Source Distributions in Sliding Contact Problems  ,” Acta Mech., 32, pp. 261–274;Dragon-Louiset, M., and Stolz, C., 1999, “Approche Thermodynamique des Phénomenès liés à l’Usure de Contact  ,” Acad. Sci. Paris, C. R., 327, pp. 1275–1280) but also to bring a new point of view on the differences observed in the past between the numerical predictions and experimental measurements.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

The four regimes of the third body according to the particle adhesion γN. (a) Fluid regime. (b) Semifluid regime. (c) Elastoplastic regime. (d) Elastic regime. UW for upper wall, LW for lower wall, and TB for third body.

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Figure 2

Description of the frontier between the granular and continuum volumes

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Figure 3

Evolution of the surface temperatures for the lower and upper bodies according the the ratio Rd∕c

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Figure 4

(a) Evolution of the temperature of the upper wall with X∕R for a semi-infinite volume (z=+∞). (b) Evolution of the temperature of the upper and lower walls with time for a finite first body thickness e. The constant of time τ=e2∕αFB appears.

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Figure 5

Thermal profiles through the contact thickness for the four different third body regimes

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Figure 6

Evolution of the upper and lower wall surface temperatures for the four different third body regimes according to X∕R

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Figure 7

Evolution of the heat flow penetrating the first bodies according to the sliding displacement

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Figure 8

Thermal asymmetries obtained by an upper first body (Material 2) more diffusive than the lower first body (Material 1) for the fluid regime where originally there is no asymmetries

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Figure 9

Inversion of the surface maximum temperature value (left) for the semifluid regime when the upper body (Material 2) is more diffusive than the third and lower body (Material 1) and surface temperature evolution with time (right)

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Figure 10

Thermal symmetry obtained in the case of the semifluid regime when the upper wall is three times more diffusive than the other bodies

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