Abstract
V-ribbed belts is a friction transmission belt, and is used as alternator, compressor and water pump drives using the power of crankshaft. The V-ribbed belt consists of a fabric, cords, adhesive rubber and rib rubber. Recently, according to the crash safety technology for the engine room, belt width is required to be reduced. Associating with the narrow width, the cord tension increases and then a new failure mode of "pop-out" is initiated at the belt side face. In this study, the failure initiation mechanism of the pop-out was discussed caring out some observations and FEA. The first step of the pop-out was the failure of the strand at the cord side-surface.
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