Abstract
Laminate that is constructed of helical cord and rubber is used inside of tire. The cord is usually used under the tensile load. However, the compressive load is applied when an automobile is driven under severe conditions such as sharp veering, stopping and starting. The compressive loading is one of the important factors for the fatigue failure in tire. In this study, the mechanical properties of the helical cord are investigated under compressive and bending conditions. A simplified mechanical model is proposed to explain the compressive and bending stiffness of helical cord and the composite material of the helical cord and rubber.
