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Research on the Hot Spots and Thermoelastic Instability of Automotive Clutches
Pages: 1234-1238
Year: Issue:  12
Journal: Transactions of Beijing Institute of Technology

Keyword:  clutchesthermoelastic instabilityhot spotscritical speed;
Abstract: 摩擦副表面的局部高温区会引起车辆离合器失效,基于热弹性不稳定性(TEI)理论,通过理论建模与分析的方法,得到系统稳定性的判断标准:临界速度及其变化规律,以及系统扰动的迁移速度.通过对摩擦片与钢片的Peclet数分析,发现局部向于出现在对偶钢片.通过对比临界速度,发现钢片呈现反对称变形.采用较小弹性模量或者较大导热系数的摩擦材料,有助于提高系统稳定性,摩擦材料的热膨胀系数对稳定性影响较小.
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