抄録
Fatigue failure mechanism in synchronous belts with steel cord was investigated. The belt failure was initiated near the tooth root, where the steel cords were broken. The steel cord was made for twisting steel wires. There are many kinds for the wire constitution. The bending stress of each wire is necessary to examine the bending strength of the twist cord, that wire constitution is different. The bending stress of the wire is found from a change of the curvature when a wire was bent. In this study, the geometrical calculating method of the wire curvature is proposed. In addition, the example of calculating the bending stress is shown by proposed method.
