About modeling of dry friction between a wheel and a road surface

Abstract

The friction between the wheel and the road, its measurement and the relationship with the risks of road accidents are important issues. Thousands of road engineers around the world are doing this. In many countries, there are certain thresholds for road adhesion that determine the least acceptable road friction. If the friction level is below this value, the risk of accidents may increase. These thresholds are the result of a study of the relationship between the speed of the center of the wheel and its angular velocity. The purpose of the work is to investigate the methods used for measuring dry friction and the quantitative relationships between the coefficients of friction with the road, the risk of accidents and the theoretical approach to their estimates. The connection of friction between the roadbed and the wheel of the car with the risk is obvious. If the road is very slippery, then the risk of skidding increases significantly, but the exact determination of the thresh old values of the coefficient of friction, which should set the parameters of the road surface, is not an easy task. This problem can be divided into two parts – methods of measuring friction and the relationship between friction and the risk of an accident.