The Numerical Simulation And Analysis Of Thermal-Mechanical Coupled For Disc Brake

Calculating the coupled temperature and stress of the brake is one of the main content in the brake design and in certain case the results have become the important theoretical foundation in constructing frictional couple materials. The object of this paper is the ZPT-650B disc brake of China Coal Research Institute Shanghai Branch, a three-dimensional transient thermal and stress coupled FEM model is established which confirms to the trim size of the disk as well as regard the coupled problem. The course of the braking is simulated using the nonlinear multi-physics field FEM.The FEM results indicate that the temperature distribution in the brake shows possesses a sharp gradient in both axial and radial directions. The great thermal stress is caused by the sharp gradient. The regulation of distribution of temperature and stress fields, the division of heat between the disc and pad are showed in this paper, the cause about the thermal stress that generates thermal cracking and thermal failure in disc brake is discussed.The results were proved to the relatively reasonable by experiments and some valuable conclusions have been gained by thorough analysis of the results. The conclusions have certainly practical significance for the design and reasonable use of the disc brake.