Physical-analytical tyre grip model developed with the aim to satisfy motorsport and tyremakers requests, providing the calculation of the power dissipated in a polymeric material indented by a road asperity, taking into account the adhesive / hysteretic effects and the viscoelastic experimental characteristics.

Friction is supposed as composed by two main components: adhesion and deforming hysteresis. adheRIDE predicts local grip for on-line analyses and real time simulations and to evaluate frictional contributions arising at the interface between tyre tread and road. An novel methodology to approximate asperities, based on rugosimetric analyses on macro and micro scale, has been specifically developed. The adhesive component of friction is estimated by means of a formulation based on two different theoretical approaches, whose parameters have been identified thanks to a wide experimental campaign carried out at Tyre Lab. The hysteretic component of friction is estimated by means of an energy balance taking into account rubber viscoelastic behaviour, characterized by means of proper DMA tests, and internal stress / strain distribution due to indentation with road.

Friction maps are produced by adheRIDE as a function of road macro and micro roughness, tread temperature, contact pressure, sliding velocity and tire viscoelastic characteristics, with the aim to feed FEM models, physically scale MF Pacejka's formulations and optimize ride and handling performance varying vehicle setup and consequently tire frictional behaviour.