基于ANSYS汽车盘式制动器温度场和热应力数值模拟

基于ANSYS建立了某汽车盘式制动器三维实体模型,分析了不同制动工况下盘式制动器的温度场和热应力,还分析了离心力与压应力和摩擦切应力分别作用下的应力分布.结果表明：热应力远大于其他应力的作用,这在分析盘式制动器失效时起着主导作用.运用循环迭代法进行温度场模拟,分析显示摩擦区温度是震荡上升、存在明显的尾迹且其显著大于非摩擦区温度.采用间接耦合法将温度场结果作为应力场载荷分析的热应力,结果显示：热应力呈现交变应力状态且幅值较大,摩擦区周向应力明显大于径向应力,制动盘凸台连接处应力很大.

Simulation of the Temperature Field and Thermal Stress for Automotive Disc Brake Based on ANSYS

Three-dimensional model of automotive disc brake was established by ANSYS. The temperature field and thermal stress field of disc brake in different braking conditions were analyzed. Besides, the stress distribution under the action of centrifugal force and pressure stress, friction stress were investigated. The results showed that the effect of thermal stress was much higher than other stress. The temperature field was simulated by using the iterative method. The analysis showed that the temperature of friction zone rose shakily and existed obvious wake, which was significantly greater than non friction zone. The indirect coupling method which considers the results of temperature field as the load of stress field was contributed to the study of thermal stress. The simulation showed that the thermal stress emerges large amplitude alternating, the circumferential stress was obviously greater than the radial stress in the friction area and the stress of the connection of brake disc boss was great.