Abstract
The tire tread pattern affects driving significantly on icy roads, and different kinds of rubber pattern mean different friction coefficients when moving on the ice surface. Based on the latest friction test rig, a simulation method of such tests was created. Therefore, the continuous sampling at low slip velocity was proposed. During the sampling, the typical pattern of the rubber specimen was employed. The friction test of the tire tread specimen on the ice surface was implemented with different slip velocities and pressure, and the results were fitted and analyzed. To research the effect of tire tread on the friction coefficient, the rubber ratio parameter (the ratio of the rubber contact area to the total contact area) was given for proper evaluation. It is found that rubber as the major component of the tire possesses a special friction property, which is against Coulomb’s law. In addition to that, the friction coefficient of rubber is influenced by the contact state to a great extent, especially in some extreme conditions. The experiment of rubber friction on ice can serve as an important reference for the study on tire mechanical properties.
Highlights
When the tire runs on the ice surface, the friction coefficient of the tire is related to the nature of the ice.[6,7]
Temperature sensors are buried on the ice surface to record the temperature in real time
The refrigeration temperature of the refrigeration equipment is reduced during the experiment to compensate for the partial cooling of the ice surface
Summary
As the physical properties of ice are complex, and in order to ensure the repeatability of the experiment, it is a good choice to design and establish an indoor test laboratory. The features of ice made by indoor facilities are affected by various factors. Ice became clearer when hot water is applied; second, the impurities and salt content of the water in producing ice both decrease the coefficient of surface friction.[19] Ice growth speed is important for the prevention of ice cracking in the test. Ice became stronger when it is created one layer following another at the speed of 3–5 mm/h. Resurfacing for another round of test can be realized through removing a thin layer and wiping with a soft cloth to get the same surface as the previous one
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