Influence of Ultrasonic In-Plane Oscillations on Static and Sliding Friction and Intrinsic Length Scale of Dry Friction Processes
Influence of Ultrasonic In-Plane Oscillations on Static and Sliding Friction and Intrinsic Length Scale of Dry Friction Processes
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DOI：
10.1007/s11249-009-9531-6
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发表时间：
2010-07-01
影响因子：
3.2
通讯作者：
Filippov, Alexander E.
中科院分区：
文献类型：
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作者：
Popov, Valentin L.;Starcevic, Jasminka;Filippov, Alexander E.
研究了不同材料（钢、黄铜、铜、钛、玻璃、铝、橡胶和聚四氟乙烯等）板与在滑动平面中以 40-70 kHz 频率振荡的钢样品之间的摩擦力。测量的摩擦系数作为滑动速度和速度振荡幅度的函数，与滑动速度大于驱动速度时基于简单库仑摩擦定律的理论预测非常吻合。然而，在小滑动速度下，摩擦系数趋于有限值，这与理论预测相反。对静态极限进行了详细研究。当振荡幅度为 20-60 nm 时，静摩擦力会急剧下降。这样的幅度足以控制摩擦系数。静摩擦和滑动摩擦的实验数据在微观模型和唯象宏观模型的框架内进行解释。引入了内摩擦滑移长度的概念。
The force of friction between plates of different materials (steel, brass, copper, titanium, glass, aluminum, rubber, and Teflon, among others) and a steel sample oscillating in the sliding plane at a frequency of 40-70 kHz has been studied. The measured friction coefficient as a function of sliding velocity and velocity oscillation amplitude fits well with theoretical predictions based on the simple Coulomb friction law at sliding velocities larger than the actuation velocity. However, the friction coefficient tends to a finite value at small sliding velocities, which is contrary to the theoretical prediction. The static limit has been studied in detail. A strong decrease in the static friction force takes place at oscillation amplitudes of 20-60 nm. Such amplitudes are enough to control the friction coefficient. The experimental data for both static and sliding friction are interpreted within the framework of a microscopic model and a phenomenological macroscopic model. The notion of intrinsic friction slip length is introduced.