Farain Kasra, Bonn Daniel
Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands.
Tribol Lett. 2022;70(2):57. doi: 10.1007/s11249-022-01598-z. Epub 2022 Apr 24.
The transition from static to dynamic friction is often described as a fracture instability. However, studies on slow sliding processes aimed at understanding frictional instabilities and earthquakes report slow friction transients that are usually explained by empirical rate-and-state formulations. We perform very slow ( nm/s) macroscopic-scale sliding experiments and show that the onset of frictional slip is governed by continuous non-monotonic dynamics originating from a competition between contact aging and shear-induced rejuvenation. This allows to describe both our non-monotonic dynamics and the simpler rate-and-state transients with a single evolution equation.
从静摩擦到动摩擦的转变通常被描述为一种破裂失稳。然而，旨在理解摩擦失稳和地震的缓慢滑动过程研究报告了缓慢的摩擦瞬变现象，这些现象通常由经验速率-状态公式来解释。我们进行了非常缓慢（纳米/秒）的宏观尺度滑动实验，并表明摩擦滑动的起始由连续的非单调动力学控制，这种动力学源于接触老化和剪切诱导的年轻化之间的竞争。这使得我们能够用一个单一的演化方程来描述我们的非单调动力学以及更简单的速率-状态瞬变现象。
