Abstract
The normal and tangential belt forces for two types of flat belts are measured and compared. From friction theory, it was assumed that the actual contact area Aa is proportional to normal pressure p; i.e., Aaαpn. For a flat belt with cloth backing, the n =2/3 is obtained for the belt surface contact model. For a flat belt with rubber backing, which is used for power transmission, the n = 0.9 to 1.0 is suggested as a surface model. Different friction surfaces, construction materials, and geometries for the two belts resulted in different contact patterns and different friction characteristics.
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