Formula Design Of Filled Rubber Material Considering Tire Grounding Characteristics

The wear resistance of the tire is determined by the tire structure and the performance of the material itself.The traditional rubber material formula design does not consider the impact of the tire structure on the wear performance.The Akron wear test results of the rubber material in the tire company cannot be compared with the tire structure wear amount.Correlation,this paper analyzes the characteristics of the tire structure to obtain the relationship between rubber material performance and tire wear performance,and then optimize the rubber material components.A finite element model of the radial tire's contact with the ground was established,and the influence of the properties of the tread rubber material on the tire's ground contact characteristics was analyzed.The simulation results show that as the elastic modulus of the tread rubber increases,the friction work and vertical and horizontal shear forces will increase accordingly;as the elastic modulus of the tread rubber increases,the contact area decreases.According to the material properties of different formulations obtained from single-component changes,a mathematical model between filled rubber formulations and rubber properties was established.The performance prediction system software for filled rubber materials was developed using Python language.The main interface of the software was constructed by some functions in the Pyqt5 library.The Excel data table obtained from the experiment was read in through the Pandas library function.The performance calculation of the filling material uses scipy.optimize.Library Functions.The software can run under the Window10 system and is backward compatible.It can predict various physical properties of rubber materials and can handle changes in the amount of multiple components.The system has the characteristics of beautiful interface and simple operation.The software test results show that the calculated results are in good agreement with the experimental results.The parameter optimization design of the rubber material formula is carried out.The tensile modulus and Akron abrasion of the rubber material are used as the objective function,and the component material content of the rubber is used as the optimization variable.The NSGA-2 multi-objective genetic algorithm is used to optimize the design of the rubber formula.The content of the rubber formula adopts the real number coding method according to the characteristics of the data.The selection of the population adopts the championship method,the crossover adopts the bounded simulation binary crossover method,and the mutation adopts A bounded polynomial mutation.The Pareto optimal solution set of the rubber formula is obtained through genetic algorithm,and the optimized rubber formula combination is given.The optimized calculation results show that when the stearic acid content increases by 0.5 phr and the Packing A increases by 0.65 phr,the Akron abrasion is reduced by 18% and the tensile modulus M50 is reduced by 13.4%.The research in this paper provides a convenient calculation platform for the design of tire rubber formula,which is beneficial to improve the research and development efficiency of new rubber filled materials.