MICRO-SCALE FRICTION MODEL FOR ELASTOMERS CONSIDERING TEMPERATURE DEPENDENT CRITERION FOR WAVE LENGTH LIMIT AND CONTRIBUTION OF ADHESIVE FRICTION

摘要

Existing friction laws for rubber like materials are tuned on available experimental data. Once their parameters are identified, a sensitivity analysis is carried out in order to check their extrapolation and prediction capabilities. It is seen that, although several fiction laws at micro scale are available in the literature, neither one is able to correctly predict the friction law at macro scale for all the tire working conditions. In the present paper a thorough review of the most advanced local friction models, i.e. Persson and Kluppel models, is carried out. Persson's model is then integrated with a limiting criterion and an adhesive contribution is added to improve the prediction of the friction law at macro scale.