Transient temperature field analysis of brake in nonaxisymmetric three-dimensional model

摘要

The disk-pad brake used in automobile is divided into two parts: the disk, geometrically axisymmetric,rnand the pad, of which the geometry is three-dimensional. Using the two-dimensional model for thermal analysisrnimplies that the contact conditions and frictional heat flux transfer are independent of θ . This may lead to falsernthermal elastic distortions and unrealistic contact conditions. An analytical model is presented in this paper for therndetermination of contact temperature distribution on the working surface of a brake. To consider the effects of thernmoving heat source (the pad) with relative sliding speed variation, a transient finite element technique is used torncharacterize the temperature fields of the solid rotor with appropriate thermal boundary conditions. Numerical resultsrnshows that the operating characteristics of the brake exert an essentially influence on the surface temperaturerndistribution and the maximal contact temperature.