Thermal Stress Analysis of Water-Cooling Brake Disc Based on 3D Thermo-Mechanical Coupling Model

Abstract

As the key part of offshore drilling drawworks brake system, the brake disc plays a vital role in guaranteeing the working reliability and operational security of the drawworks. To obtain the distributions and variations of thermal stress field in the water-cooling bake disc in an emergency braking, the 3D thermo-mechanical coupling theoretical model and FEM were established in this paper. Meanwhile the displacement and thermal boundary conditions for solution were determined, and then fully coupled analysis of thermal stress field in the disc was carried out by using ABAQUS software. The analysis results showed that, temperature field and stress field in the process of emergency braking were fully coupled. The temperature, radial stress and circumferential stress on the disc surface were presented as a hackle. The circumferential stress was significantly greater than the radial stress. Thermal stress has a periodic effect on the brake disc during braking, so the circumferential stress is the main factor that accounts for the initiation and propagation of crack on the brake disc surface.

Coupled temperature-displacement modeling to study the thermo-elastic instability in disc brakes

“…Jung et al (2012) generated the mechanical and thermal models for the disc brake separately, and solved iteratively using the staggered approach. Tang et al (2011) solved a 3D thermo mechanical disc brake problem with water cooling system typically used in the offshore drilling systems by ABAQUS®. The sequentially coupled thermal stress model is utilized for the analysis of this disc brake model and the radial and circumferential stresses are plotted for the different instances of braking operation.…”