A mechanical system to predict wet grip potential of pavements

Abstract

A precise friction model is essential for the prediction of tyre wet grip performance and optimization of pavement surface texture design. A mechanical system for predicting the wet grip potential of asphalt pavement was systematically presented using an extended rubber material model by a time step integration scheme. This analytical approach was transferred to a 2D numerical multi-body system consisting of interconnected masses, coupling spring and elementary rubber element of a generalized Maxwell model of rubber tyre tread. The system consists of two basic modules with the same program structure and algorithm, considering the frequency-, temperature-, and strain-dependency behaviors of the complex dynamic modulus of rubber element. The dependence of penetration depth and friction coefficient on the velocity was simulated and validated. It can be concluded that this system can be used for predicting the wet grip potential of asphalt pavements.

Keywords

wet grip / rubber tyre rim / penetration depth / friction coefficient / dynamic model

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