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International audienceVibration and wear debris analyses are the two main conditions monitoring techniques for machinery maintenance and fault diagnosis. In addition, numerical simulation can provide useful tools to assess the proper functioning of industrial machines. We use dierent suspension theories with a concern of the eect of solid particles liquid lubricant itself on bearing behavior. We consider both simple models based on the Einstein's mixture theory and a micropolar uid theory, which is characterized by the presence of suspended rigid micro-structured particles. We suppose in this study that there are no abrasion and no wear (which are not benecial for the contact performances) due to the presence of particles. Thus in this case we found theoretically that the presence of rigid particles in the lubricant increases the eective viscosity which enhances the load-carrying capacity as well as the minimum lm thickness

On the influence of particle concentration in a lubricant and its rheological properties on the bearing behavior