WEAR, FRICTION, AND TEMPERATURE CHARACTERISTICS OF AN AIRCRAFT TIRE UNDERGOING BRAKING AND CORNERING

摘要

An experimental investigation was conducted to evaluate the wear, friction, and temperature characteristics of aircraft tire treads fabricated from differ¬ent elastomers. Braking and cornering tests were performed on size 22 x 5.5, type VII aircraft tires retreaded with currently employed and experimental elastomers. The braking tests consisted of gearing the tire to a driving wheel of a ground vehicle to provide operations at fixed slip ratios on dry surfaces of smooth and coarse asphalt and concrete. The cornering tests involved freely rolling the tire at fixed yaw angles of 0° to 24° on the dry smooth asphalt surface. The results show that the cumulative tread wear varies linearly with distance traveled at all slip ratios and yaw angles. The wear rate increases with increasing slip ratio during braking and increasing yaw angle during cor¬nering. The extent of wear in either operational mode is influenced by the character of the runway surface.