径向非均布压力分布对湿式摩擦副热-机耦合影响

采用有限元模拟和实验的方法,对比分析了5种不同的径向非均布压力分布方式对湿式摩擦副工作过程中热机耦合的作用.结果表明:在加载同种径向压力作用下,对偶钢片的温度场、应力场和应变场三者之间存在较强的耦合关系;在工作终态时,温度、应力和应变场环带的径向位置和各物理量的最值较原加载压力峰值位置向盘面中心方向移动,环带径向位置变化率为盘面宽度的10%~40%;径向压力分布方式对于摩擦副的温度,应力和应变的最值有直接关系,压力沿内外半径波峰式分布时温度、应变最值最大,压力由内径至外径线性减小时应力最值最大,压力沿内径向外径波谷式时变化则是温度、应力和应变最值最小. 

Influence of Radial Non-Uniform Pressure Distribution on Thermo Mechanical Coupling of Wet Friction Pairs

Comparing five radial pressure distribution forms, the effect of radial non-uniform pressure distribution on thermo-mechanical coupling of wet friction pair was analyzed by means of finite element simulation and experiment. The results show that there is a strong coupling relationship among the temperature field, stress field and strain field of the dual steel sheet under the same radial pressure. At the end of the working state, the radial position of the temperature, stress and strain field and the maximum value of each physical quantity move to the center of the disk compared with the peak position of the original loading pressure, and the change rate of the radial position of the ring is 10%~40% of the disk width. The radial pressure distribution mode has a direct relationship with the temperature of the friction pair and the maximum value of stress and strain. When the pressure is distributed along the inner and outer radius wave crest, the value of temperature and strain is maximal. When the pressure is linearly reduced from the inner to the outer diameter, the value of stress gradually go to maximum. When the pressure changes along the inner diameter wave trough, the value of temperature, stress and strain is minimal.