Paper: Effects of debris particles in sliding/rolling EHD contacts.

Authors: Nikas, G. K., Sayles, R. S., and Ioannides, E.

Where: Abstracts of papers of the First World Tribology Congress, 8-12 September 1997, London, England, p. 271.

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Abstract

    The influence of debris particles in concentrated contacts has been studied in the past, mainly experimentally. Most theoretical studies were focused on purely rolling, isothermal contacts. The present work is a summary of the theoretical work done in the frame of a research project dealing with the thermo-elastoplastic effects of relatively soft particles in EHD contacts. The theoretical formulation is based on the theory of thermoelasticity and covers several areas of study. The mathematical modelling and computer simulation involve the following.

    The present work covers sliding-rolling (and not only purely rolling) contacts, it incorporates a three-dimensional thermal stress analysis, and all three-dimensional calculations are based on as few as possible simplifying assumptions. Material thermal properties are allowed to vary with temperature and thermal anisotropy is incorporated into the theoretical model (assuming orthotropic materials). Realistic boundary conditions are used throughout the analysis.

    Some of the most important results are the following:

Fig. 1. Temperature rise on a surface owing to the frictional heating when a 30 micron particle is trapped in a sliding EHD contact. Copyright George K. Nikas

Fig. 1. Temperature rise on a surface owing to the frictional heating when a 30 micron particle is trapped in a sliding EHD contact.

 

See also the author's related paper.

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