Abstract
This paper describes the simulation procedure of a ply steer residual aligning torque (PRAT) using a stationary global rolling finite-element method (FEM) tyre model combined with a detailed local FEM tread pattern model. The simulated results of the PRAT for eight tread pattern variants are compared with measured values of experimental tyres and do show a high correlation. Additionally, simulated local contact stress distributions of the tread blocks on a rolling tyre show a high degree of similarity compared with measured distributions generated with a specific in-house test drum. Finally, the local contact stresses are mechanically interpreted to obtain a basic understanding of how the PRAT is generated by the tread pattern. The application of the prescribed simulation procedure to realistic serial patterns is planned for the future. Thus tyre body and pattern PRAT effects can be balanced and the car manufacturers’ requirements will be met in an early stage of product development.
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