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Tribological properties and thermal-stress analysis of C/C-SiC composites during braking |
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| Authors: | Guan-yi CHEN Zhuan LI Peng XIAO Xi OUYANG Wen-jie MA Peng-tao LI Jin-wei LI Yang LI |
| Affiliation: | 1. National Key Laboratory of Science and Technology for National Defence on High-strength Structure Materials, Central South University, Changsha 410083, China;2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;3. Institute of Science, Inner Mongolia First Machinery Group Co., Ltd., Baotou 014030, China |
| 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. |
| Keywords: | C/C-SiC composites brake tribological behavior temperature field thermal-stress field |
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