Effects of Aspect Ratio on the Stresses and Deformations of Radial Passenger Tires

Abstract

The effects of aspect ratio on the stresses and deformations of radial passenger tires under inflation pressure are analyzed with the nonlinear finite element method. The stiffness properties of the cord-rubber composites used in this paper were measured by a Shimadzu Universal Testing Machine DCS-500. The analysis shows that when the aspect ratio decreases from 80 to 70, while the properties of the materials and the inflation pressure of the tires remain the same, the stresses in the carcass decrease by 5%, and those in the belt increase by 10–15%. Illustrations are given for inflated shapes, cord loads, and lower sidewall displacements.