ABSTRACT
The dry friction in the tyre-road contact is mainly based on two physical effects i.e. hysteresis and adhesion. The asphalt roughness effects deformations in the visco-elastic tyre material which leads to energy dissipation and hysteresis friction. Adhesion originates from intermolecular bindings between rubber and the contact partner. The presented hysteresis model describes the rubber as a linear visco-elastic material with an extended Maxwell model. According to Kummer the rubber friction process can be divided into four parts: hysteresis, adhesion, cohesion and viscous friction. The rubber compound used for experiments and simulations in this work is a styrene butadiene rubber (SBR) filled with 60 phr carbon black. Adhesion friction arises from intermolecular links between the contact partners. This effect causes an adhesion force which is not negligible, especially on dry surfaces. A model for hysteresis friction has been developed that works in time domain.
