AXISYMMETRICAL ANALYSIS OF TRANSIENT THERMOELASTIC BEHAVIORS IN COMPOSITE BRAKE DISKS

This article presents the transient thermoelastic behaviors of carbon/ carbon composite brake disks in the brake housing during braking actio n. The heat transfer problem from frictional heat and the elastic prob lem dealing with thermomechanical deformation in brake contact are cou pled to each other. The coupled heat and elastic analysis were carried out using the finite element method. The fully implicit transient sch eme for the thermoelastic analysis was newly implemented to improve th e accuracy of calculations at every time step. Since the heat capacity of carbon/carbon composite is very large, the high temperature of the brake disk system is confined to only the narrow regions near the fri ction surfaces. Therefore, the thermoelastic behaviors of carbon/carbo n composite brake disk system were little affected by the thermal boun dary conditions in the brake housing during braking action.