Theoretical Modeling and FEA of Thermo-mechanical Coupling Dynamics of Ventilated Disc Brake

Abstract:

The theoretical model and FEM of three-dimensional transient thermo-mechanical coupling of the ventilated disc brake with asymmetrical inner and outer disc plate thickness are established,taking into account the real friction-velocity curve of the disc pad couple.Based on the finite elements analysis of the model,the predictions of the thermo-mechanical responses of the brake disc are presented,including disc transient temperature field and normal stress in radial,circular and axial directions,disc lateral deformation and disc thickness variation.Numerical predictions of the disc surface temperature and lateral deformation are compared with experimental measurements obtained by thermocouples and non-contact displacement sensors on test rig,and the simulation results are consistent with the experimental results.The simulation results reveal the complex coupling relations among temperature,normal stress and thermoelastic deformation due to the ventilated slots and asymmetrical inner and outer disc plate thickness,and the interactions among frictional,thermal and mechanical dynamics.