Influence of Service Conditions of Quarry Dump Trucks on the Thermal State Large-size Tires

Operability of tires depends substantially on their thermal state. High operational temperature of tires worsens mechanical properties of tire materials and reduces their durability. The country average level of large-size and over large-size tires service life considerably decreases because of the tires which have failed as a result of thermal destructions. In order to decrease the operational temperature and, consequently, increase the service life of tires taking into account their hypersensibility to various service conditions, quality of production and other factors, complex researches of a thermal state have been made. Dependence of tire temperature on the load factor and speed was received. Such studies conducted to date are still insufficient. They have partial, local character and make it impossible to establish the regularities allowing to ensure the required performance of tires.