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《Mechanical Science and Technology for Aerospace Engineering》 2012-09
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Temperature and Stress Distribution for the High-speed Multiple Units Brake Pad

Xia Yimin,Wu Yuan,Gu Jianjian,Bian Zhangkuo,Zhang Zhenhua(State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083)  
The temperature and stress distribution in brake pads is a key factor for the high-speed multiple units safe operation.According to the heat transfer theory and using the finite element simulation technology,a heat conduction model of brake pad was established in this paper.The impact due to the elastic modulus,poisson ratio,thermal conduction and specific heat was considered and the calculation method of thermal load and heat transfer coefficient was also presented.A 3D thermal-stress coupling simulation model for the braking of brake pad was built by software ANSYS.Then the dynamic temperature and stress distribution in the braking of brake pad were obtained and verified by experiemnts.The simulation result shows that the brake pad would reach the max temperature 535 ℃ at 62 s and the max stress 333 MPa at 75 s.Owing to the temperature simulation results in accordance with the expermental results basically,it could demonstrate that the simulation method was effective and this type of brake pads studied in the paper met the practice requirements.
【Fund】: 国家高技术研究发展计划项目(863计划 2006AA03Z508);; 中南大学研究生教育创新工程选题项目(1343-77302)资助
【CateGory Index】: U260.35
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