Abstract
The synchronous belts are used under fluctuation torque conditions in an automobile cam-shaft drive system. Under such conditions, the fatigue damage is accumulated at the tooth root in the driving direction side, although the fatigue damage is accumulated at the opposite tooth root under steady torque conditions. In this study, the mechanism in which the damage accumulation site is changed with the torque condition is examined. Especially, effects of belt tension, tooth load and tooth height on the damage accumulation site are examined using FEM analysis.
