Stick-slip in sliding systems with tangential contact compliance
Stick-slip in sliding systems with tangential contact compliance
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DOI：
10.1016/j.triboint.2009.04.039
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发表时间：
2009-12
影响因子：
6.2
通讯作者：
K. Nakano;S. Maegawa
中科院分区：
文献类型：
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作者：
K. Nakano;S. Maegawa
具有柔性体的滑动系统（即，软材料）的接触区被建模为一个包含切向接触柔量的一般两自由度系统，并推导了一系列无量纲控制方程。在此基础上，对模型系统的粘滑特性进行了数值仿真研究。通过使用方程中包含的六个无量纲参数，我们得到了可以应用于滑动系统设计的防止粘滑的标准，例如接触表面的软材料的选择。此外，还观察到了切向接触柔度引起的一些异常现象。即使支撑部分过阻尼，粘滑运动也可以通过接触区的质量惯性来促进;此外，切向接触柔量会在使用支撑弹簧的伸长测量静摩擦系数和动摩擦系数时引起严重误差。
Sliding systems with a flexible body (i.e., a soft material) in the contact zone were modeled as a general two-degrees-of-freedom system that includes tangential contact compliance, and a series of dimensionless governing equations was derived. Based on the equations, a numerical simulation was conducted to study the stick-slip characteristics of the modeled system. By using six dimensionless parameters included in the equations, we obtained criteria for preventing stick-slip that can be applied to the design of sliding systems, such as the selection of soft materials for contact surfaces. In addition, some unusual phenomena caused by tangential contact compliance were observed. Even if the supporting section is overdamped, stick-slip motion can be promoted by the inertia of the mass of the contact zone; moreover, tangential contact compliance can cause serious errors in the measurement of the static and kinetic friction coefficients that uses the elongation of the supporting spring.