A general transient model for microelastohydrodynamic lubrication with Eyring fluid was established in this paper to describe the basic processes involved in thin film lubrication with rough surfaces, namely the process of a single asperity when it passes through the macro-EHL contact with or without sliding, and the process for a pair of asperities when they collide under macro-EHL pressure ambient. The solution of this model was performed by a relaxation iteration method that had been found to be simple and effective. Results showed some physical features that were previously unknown, and provided information to unlock the mysteries of several important failure mechanisms in lubricated concentrated contacts.

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