Abstract: An analysis approach and modelling procedure is developed to analyse the transient contact temperature of tooth surface for involute gears. Contact stresses of meshing gear teeth with standard and modified profiles is analysed by using Hertz contact theory and finite element method. The relative sliding velocity, the coefficient of friction and frictional heat flux between contact tooth flanks are calculated. A 3-D finite element model of gear tooth is developed to investigate the bulk temperature of gear tooth. The flash temperature of tooth surface is also calculated. Factors influencing the tooth bulk temperature and the surface transient contact temperature of involute gears with standard and modified tooth profiles are investigated.

Key words: Finite element method, Friction, Gear, Heat flux, Temperature