Application Of New Material NW SiO₂ In The Tread Rubber And Simulation Of Affection Of Belt Structure On The Performance Of Radial Tire

Based on the preceding study in the field of radial tires, supported by the Science and Technology Nova Plan of Beijing City, the study was for the project-Computational Simulation of the Affection of Material Properties and Composite Structure on the Dynamic Performances of Radial Tire. In the study, the theories of tires were summed up. The research work was mainly focused on the two points: one is the application of new silica NW SiO2 in tread of car radial tire and the other is the simulation of belt structures' affection on the static and dynamic performances of radial tire. The main achievements are briefly introduced as the following.In the applications of new materials in tire, it was discovered by contrast experiments that the NW SiO2 could strikingly improve general performances of tire. In this thesis, an explanation was given as to why the new material NW SiO2 may result in a good balance on the "ghost triangle of tire": the rolling resistance, the wearlessness and the wet traction. The experiment results also showed that the NW SiO2 had favorable process performances. The reason why the rolling resistance dropped distinctly when the carbon black was substituted partly by NW SiO2 in tread, is that the NW SiO2 can reduce the tg 8 more evidently than carbon black. In the thesis, two reasons were submitted to explain why the wear resistance and the wet traction performance of tread could be improved by substituting carbon black partly with NW SiO2. One is that the NW SiO2 can be easily dispersed in rubber molecule groups, increasing the reinforcement effect of the rubber; the other is that the compounds including NW SiO2 have a high tg 6 at low temperature.Regarding the affection of belt construction on the performances of tire, a series of simulations were done in the study. By using the upward movement of the rigid contact ground to represent the sunk of tire under a perpendicular load, the calculation time was reduced greatly. A way to improve the performance of tire by changing the belt structure design was found out. In the way, new typeIIIbelts were designed, resulting in better simulation performance of tire. After the static and dynamic performances of tire with five types of belt structure being simulated, it was turned out that the D type belt was the best in structure design and general performances. In addition, a tire with D type belt can be made more easily and a better high-speed performance can be expected.