Simulation Analysis Of Tire Tread Wear And Study On Its Wear Characteristic

Tire is the only part of the contact between vehicle and road surface.It bears the impact of vehicle mass and ground face,which directly affects the performance of automobile such as power,safety and reliability.There are many factors affecting the wear performance of tire rubber,and tire hysteresis heat generation affects tire wear performance by changing temperature and tire pressure.Therefore,it is of great significance to study the effect of hysteresis heat generation on tire tread wear performance.In this paper,the influence of tire pressure change on tread wear performance caused by tire hysteresis heat generation is studied by using finite element method and theoretical numerical method,taking 195/55 R15 85H radial tire as the research object,and the effect of tire pressure change on tread wear performance is studied by means of finite element method and theoretical numerical method.First of all,the dependence of load,angle,velocity,tread formula and temperature on the wear performance of rubber composites is analyzed,and the relationship between the influencing factors of tire wear performance is obtained.The angle has the greatest influence on rubber wear performance,and the load has the second impact.For the tire,the load mainly affects the tire wear performance by affecting the pressure of the tire contact surface.The tire pressure is affected by temperature,and the effect of velocity on rubber wear performance is mainly reflected by temperature,which has the most complex mechanism on rubber material.The formula of rubber compound mainly affects the wear performance of rubber by affecting the mechanical properties of rubber.Secondly,based on the analysis of tire heat generation mechanism and tire rolling resistance mechanism,a formula for solving tire hysteresis heat generation with the speed as input is obtained.Through the analysis of the relationship between tire hysteresis heat generation and tire temperature,it is found that there is a four-order function relationship between tire viscoelastic hysteresis loss and tire temperature.Then,according to the relationship between temperature and air pressure in the law of thermodynamics,the functional relationship between tire hysteresis loss and tire pressure is deduced.Finally,based on the analysis of the influence of tire pressure on tire wear,a prediction model of tire pressure change and tire tread wear caused by hysteresis loss is established.Next,according to the actual size and parameters of 195/55 R15 85H radial tire,an accurate finite element model is established,and the Yeoh model is selected to characterize the mechanical properties of rubber materials.The cord-rubber composite material is characterized by reinforcement model,and the model parameters of each part of the material are calculated and solved.Finally,the plane axisymmetric finite element model and the three-dimensional finite element model of tire are established.The displacement of the two-dimensional and three-dimensional finite element model of tire filled with 0.24MPa is compared with the actual situation.The comparison results further prove that the established finite element model is effective.Finally,a new abrasion model considering the historical dependence and directivity of the wear process is proposed.According to the abrasion model,the tire tread wear amount after driving 10000km at the speed of 80km/h,100km/h and 120km/h is calculated in ABAQUS.Then the simulation results and the prediction results of the established prediction model are compared and analyzed,and the comparison results show that the wear amount calculated by the prediction model is close to the simulation results,and the error is 10.46%,which proves that the prediction model established is effective.It is of great significance for predicting tire tread wear.