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Load carrying capacity of a heterogeneous surface bearing

Friction 2015年第4期3卷 287-293页

作者： Evan THOMAS mircea d pascovici Romeo P GLOVNEA Tribology Laboratory Department of Engineering and DesignUniversity of SussexUnited Kingdom Machine Elements and Tribology division Politehnica University of BucharestBucharestRomania

It has been shown before that liquids can slip at a solid boundary,which prompted the idea that parallel-surfaces bearings can be achieved just by alternating slip and non-slip regions in the direction of fluid *** amount of slip at the wall depends on the surface tension at the liquid-solid interface,which in turn depends on the chemical state of the surface and its *** the present study a heterogeneous surface was obtained by coating half of a circular glass disc with a coating repellant to glycerol.A rotating glass disc was placed at a known/calibrated distance and the gap was filled with *** the mobile surface moving from the direction of slip to non-slip region it can be theoretically shown that a pressure build up can be *** pressure gradient in the two regions is constant,similar to that in a Rayleigh step bearing,with the maximum pressure at the separation *** heterogeneous disc was placed on a holder supported by a load cell thus the force generated by this pressure increase can be measured *** were carried out at different sliding speeds and gaps and the load carried was measured and subsequently compared with theoretical *** allowed the slip coefficient to be evaluated.

关键词： bearing slip heterogeneous load

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