EXPERIMENTAL INVESTIGATION AND ANALYSIS ON DYNAMIC STRAIN AND TEMPERATURE OF DRUM BRAKE

The working process of drum brakes involves strong thermo-mechanical and tribological coupling behaviors. The research on the dynamic strain of a drum brake is of great significance to its performance analysis, structure optimization and fatigue prediction. A new test procedure is proposed to investigate the dynamic behaviors of a working drum. The strain-time properties and temperature-time properties of the friction surface of the drum are studied respectively. Thermo-mechanical and tribological coupling analysis is conducted by using software ABAQUS as well. The results show that the strain is uneven in different deformation status when the drum contact different zones of friction plates, and that a set of four wave crests is repeated. Meanwhile, thermal effect is proved significant to its mean strain status.