Sensitivity Analysis Of The Bead Area Of Radial Tire By Combination Modeling Techniques

Due to the frequent occurrence of tire failure damage of BTR tire, more and more attention is paid to the Finite Element Analysis (FEA) of the dangerous region in tire bead area. The performance optimization for the tire dangerous region mainly depends on two methods: one concerns the tire structure, through adjusting the structure parameters of tire to improve the performance; the other concerns the material properties of tire, through adjusting the material parameters of tire to improve the performance. Owing to the complexity of tire manufacturing process, the former is usually time and money consuming while the latter becomes more and more appreciated by tire companies with the development of tire materials technology. Through adjusting the material parameters of tire, the paper tries to get optimized material parameters for improving the stress-strain field of tire bead area by numerical means.Based on 1200R20 BTR tire, with the application of ABAQUS software, the multiple combination model of tire was constructed by combination modeling techniques. The cases of assembly, inflation, static loading were carried out. Necessary evaluation of the model was conducted.Based on the model above, the sensitivity analysis of the normal stress and strain of the dangerous region to the material parameter C10 of the rubber in tire bead area was carried out under standard operating conditions. The influence of the dangerous region in tire bead area caused by the parameter altering of rubber materials was investigated. Numerical results show that the increase of the material parameter C10 of bead rubber, wear-resistant rubber, upper triangular rubber and lower triangular rubber, that is, the increase of the fixed extension module of corresponding materials at the same time can effectively improve the performance of the dangerous region in tire bead area. For the nonlinear problem investigated in the paper, different load conditions can cause different constraint conditions which have great influence on optimization program. Owing to the frequent occurrence of tire damage under overload conditions, the optimization program under standard operating conditions was carried out further under low pressure overload, standard pressure overload and overpressure overload conditions. Numerical results show that the optimization program under standard operating conditions can be applied to standard pressure overload and overpressure overload conditions not to low pressure overload conditions.