Contact dynamics of EHL contacts with time varying operating conditions


Venner, C.H. and Popovici, G. and Wijnant, Y.H. (2003) Contact dynamics of EHL contacts with time varying operating conditions. In: G. Dalmaz & A.A. Lubrecht & M. Priest (Eds.), Transient Processes in Tribology. Elsevier, pp. 189-200. ISBN 9780444517067

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Abstract:By means of numerical simulations of two situations with time varying operating conditions it is shown that the dynamic behaviour of Elasto-Hydrodynamically Lubricated contacts in terms of vibrations can be characterized as: Changes in the mutual approach lead to film thickness changes in the inlet which are propagated through the film at the momentary entrainment speed. The mutual approach of the two contacting bodies is determined by the equation of motion. The frequency of oscillations that occur can accurately be predicted from a simplified analysis based on a Hertzian dry contact. The amplitude of the induced film thickness oscilations depends on the elastic properties of the loading system and on the amount of lubricant supplied. The damping depends on the lubricant properties and on the degree of starvation. The computations were carried out for the configuration of a ball on disk apparatus for which experimental results have been published.
Item Type:Book Section
Copyright:© 2003 Elsevier
Engineering Technology (CTW)
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