1 results about "Slip velocity" patented technology

This invention discloses a method for predicting the macroscopic friction coefficient of tires based on the microscopic friction properties of tread rubber, belonging to the field of tire friction coefficient prediction technology. The method first obtains the shape and pressure distribution of the tire contact patch through experiments or simulations, establishing a three-dimensional complex contact patch model considering longitudinal grooves. Then, by conducting friction tests on tread rubber blocks, a microscopic friction model is established to show how the friction coefficient varies with contact pressure and slip velocity. Next, the slip velocity distribution within the contact patch is calculated, and combined with the contact pressure and the microscopic friction model, the friction coefficient at each point within the patch is determined. Finally, by integrating the stress over the entire contact patch area, the longitudinal dynamic friction coefficient of the tire is obtained, achieving accurate prediction from the microscopic properties of the tread rubber material to the overall macroscopic friction coefficient of the tire. This invention improves prediction accuracy, shortens the development cycle, and provides an effective tool for tire design and virtual vehicle matching.