Experimental Study on Dynamic and Static Mechanical Properties and Thermal Properties of Tyre Rubber

Abstract

In this paper, the dynamic and static mechanical properties and thermal properties of rubber materials used in tires were tested, the experimental data were measured and the performance characterization was completed, which laid a foundation for the accurate completion of tire finite element modeling and simulation. Shimazu universal electronic testing machine was used to carry out cyclic stretching under multiple strains on each rubber. When the stress-strain curve reached a stable state, the last tensile curve was taken as the experimental curve. Three common constitutive models were used to fit the experimental data, and the best fitting YEOH model was selected to characterize the static mechanical properties of rubber materials. Secondly, the viscoelastic parameters of the tire at three frequencies corresponding to three speeds were tested by the dynamic thermomechanical analyzer, and the variation curves of the Hysteresis coefficients (tanδ) at each frequency with the rise of temperature were obtained. And average the points of the curve to get the average value which will be used in the following calculation. Finally, the specific heat and thermal diffusion coefficient of the compound were measured by laser heat conduction instrument, and the density of the compound was measured by drainage method based on the principle of hydrostatics. The thermal conductivity coefficient was calculated by formula.