Behavior of adhesive boundary lubricated surfaces under shear: A new dynamic transition
Behavior of adhesive boundary lubricated surfaces under shear: A new dynamic transition
复制标题
剪切下粘合边界润滑表面的行为：新的动态转变
DOI：
10.1209/epl/i2002-00424-4
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发表时间：
2002
期刊：
影响因子：
1.8
通讯作者：
P. Richetti
中科院分区：
文献类型：
--
作者：
C. Drummond;J. Elezgaray;P. Richetti
根据实验条件，粘性边界润滑表面在剪切下表现出不同的响应。特别地，不同动态阶段之间的过渡可以通过改变滑动速度来触发。超过某个临界驱动速度时，滑动从稳定的动力学状态转变为倒置的粘滑状态，与传统的粘滑状态相反，摩擦尖峰指向下方而不是上方。在这里，我们报告了在较高剪切速率下发生的第二次转变，从倒置的粘滑状态中出现了第二稳态平滑滑动状态。在向粘滑状态转变开始时，新的稳态表现出比第一稳态的摩擦更低的摩擦。在高速平滑稳态和高度周期性粘滑状态之间可以观察到一系列具有周期性和非周期性模式的复杂振荡滑动状态。
Adhesive boundary lubricated surfaces display different response under shear depending upon the experimental conditions. Particularly, the transition between different dynamic phases can be triggered by changing the velocity of sliding. Above some critical driving velocity, the sliding transits from a steady kinetic state to an inverted stick-slip regime where, in contrast to conventional stick-slip, the friction spikes point down rather than up. Here we report a second transition occurring at higher shear rates, with a second steady-state smooth sliding regime emerging from the inverted stick-slip regime. The new steady state exhibits a lower friction than the one of the first steady state at the onset of the transition to the stick-slip regime. A sequence of complex oscillatory sliding states with periodic and aperiodic patterns can be observed between the high-velocity smooth steady state and the highly periodic stick-slip regime.