Experimental and finite element studies of the running of V-ribbed belts in pulley grooves

Abstract

A finite element model of a complete loop of V-ribbed belt running between two torque transmitting pulleys has been created to study the mechanics of contact between a belt rib and pulley groove. It has been validated against experimental measurements of radial movement of a K-section belt running on 80 mm diameter pulleys. Patterns of sticking and slip between the belt and pulley are predicted. Of particular interest are the patterns of traction in entry and exit regions and, in fully seated regions, the variations with distance from the cord line. Both steady state and transient behaviours are modelled. Successful computations have only been achieved after developing a simplified description of the belt rubber's incompressible hyperelasticity, based on subsidiary experimental and finite element testing. Of major interest is the severe contact conditions predicted on driving pulleys compared to driven pulleys at the same loading.