Nonlinear Transient Behavior of a Sliding System With Frictionally Excited Thermoelastic Instability
Nonlinear Transient Behavior of a Sliding System With Frictionally Excited Thermoelastic Instability
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DOI：
10.1115/1.1353180
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发表时间：
2001-10
影响因子：
2.5
通讯作者：
P. Zagrodzki;K. Lam;E. A. Bahkali;J. Barber
中科院分区：
文献类型：
--
作者：
P. Zagrodzki;K. Lam;E. A. Bahkali;J. Barber
本文对含摩擦生热的两滑动层间静止层的二维热弹性接触问题进行了瞬态有限元模拟。由于涉及的Peclet数很高，因此使用petrov-Galerkin算法来离散滑动层。通过与Lee和Barber（1993）的分析预测进行比较，验证了线性、完全接触状态下的结果。分离发生后，有一个非单调过渡到一个稳定状态的接触区分开相同的波长。在过渡期间，迁移速度表现出的值低于那些在线性政权或最终稳定状态。当几个波长是不稳定的，最终的稳定状态通常是对应于最长的不稳定波长，即使其他模式有更快的增长率在线性制度。
A transient finite element simulation is developed for the two-dimensional thermoelastic contact problem of a stationary layer between two sliding layers, with frictional heat generation. The petrov-Galerkin algorithm is used to discretize the sliding layers because of the high Peclet numbers involved. The results in the linear, full contact regime were validated by comparison with the analytical predictions of Lee and Barber (1993). After separation occurs, there is a non-monotonic transition to a steady state with the contact regions separated by the same wavelength. During the transition, the migration speed exhibits values lower than those in either the linear regime or the final steady state. When several wavelengths are unstable, the final steady state is generally that corresponding to the longest unstable wavelength, even though other modes have more rapid growth rates in the linear regime.