Rolling Resistance and Carcass Life of Tires Operating at High Deflections

摘要

The purpose of the study was to determine the effects of tire deflection on rolling resistance and tire life. The tests were conducted on a standard 84-inch diameter aircraft tire dynamometer. Some qualitative effects of deflection were determined. The rolling resistance of a pneumatic tire subjected to a load acting through the wheel axis and normal to the contact patch plane is a function of velocity, deflection, and carcass temperature. When the load and carcass temperature are held constant, rolling resistance increases with increasing deflection and increasing velocity. For a constant deflection and carcass temperature, rolling resistance decreases with increasing inflation pressure. Experimental data indicate that increasing carcass temperature while maintaining a constant deflection results in decreasing rolling resistance. (Author)