C/C-SiC复合材料在制动过程中的摩擦磨损性能及热应力仿真分析

来源期刊:中国有色金属学报(英文版)2019年第1期

论文作者:陈冠一 李专 肖鹏 欧阳曦 马文杰 李鹏涛 李金伟 李杨

文章页码:123 - 131

关键词:C/C-SiC复合材料;制动;摩擦磨损行为;温度场;热应力场

Key words:C/C-SiC composites; brake; tribological behavior; temperature field; thermal-stress field

摘    要:为了研究C/C-SiC复合材料的摩擦磨损性能及制动过程中的热应力行为,对C/C-SiC复合材料进行模拟高铁制动条件下的自对偶摩擦磨损测试,同时在ANSYS有限元模拟软件中对制动过程的温度及结构场进行耦合。结果显示,C/C-SiC复合材料在制动过程中表现出优异的静摩擦因数(0.68)以及动摩擦因数(平均值为0.36);摩擦面的最高温度为445 °C。模拟的温度场结果显示,摩擦面的最高温度为463 °C。模拟热应力场结果显示,制动过程中摩擦面上的最大热应力为11.5 MPa。摩擦面上的温度与热应力分布呈相似趋势。

Abstract: The tribological properties and thermal-stress behaviors of C/C-SiC composites during braking were investigated aiming to simulate braking tests of high-speed trains. The temperature and structural fields of C/C-SiC composites during braking were fully coupled and simulated with ANSYS software. The results of tribological tests indicated that the C/C-SiC composites showed excellent static friction coefficient (0.68) and dynamic friction coefficient (average value of 0.36). The highest temperature on friction surface was 445 °C. The simulated temperature field showed that the highest temperature which appeared on the friction surface during braking was about 463 °C. Analysis regarding thermal-stress field showed that the highest thermal-stress on friction surface was 11.5 MPa. The temperature and thermal-stress distributions on friction surface during braking showed the same tendency.

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