Theoretical analysis of thermoviscoelastic contact between friction lining and wire rope in mine friction hoists

Serious accidents of mine hoists caused by high-speed sliding between friction lining and wire rope are often seen in coal mines. In order to solve this problem, we analyzed the contact characteristics between friction lining and wire rope. Then we carried out a dynamic mechanical analysis (DMA) to explain the change in mechanical properties of the friction lining as function of temperature and load frequency and found that temperature has a stronger effect on the mechanical properties than the frequency. We used multiple regression analysis to obtain the thermoviscoelastic constitutive relations of the friction lining. As well we derived the analytic solution for the thermoviscoelastic contact radius and pressure by combining the theory of viscoelastic contact mechanics with thermoviscoelastic constitutive relations.