Nonlinear FEM Structures Analysis for Radial Tire Contact Deflection

3D nonlinear FEM analysis for 195/60R14 radial tire was conducted. Under two loading conditions, the fundamental characteristics of cord tensile stress and shear stress were studied, respectively. They preliminary numerical results point out that the contact friction forces is not symmertrical distribution along the centerline of the tire. This skew symmetric distribution of the contact friction forces is caused by the belt construction of the radial tire. The cord stress distribution is complex in cap ply, belt and carcass. The distribution and value of cord stress change greatly with the varieties of load. The stress level is high in shoulder and the cord stress changes greatly with the varieties of load in the local. It will cause layer desquamation due to enduring periodic load. The results are helpful to predict the performance of tire and avoid quantity damage caused by tire construction design. Some bad force status for performance of tire can be corrected by optimizing tire structure.