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Transition from Static to Dynamic Friction in an Array of Frictional Disks.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-01-24 , DOI: 10.1103/physrevlett.124.030602 Harish Charan 1 , Joyjit Chattoraj 2 , Massimo Pica Ciamarra 2 , Itamar Procaccia 1
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-01-24 , DOI: 10.1103/physrevlett.124.030602 Harish Charan 1 , Joyjit Chattoraj 2 , Massimo Pica Ciamarra 2 , Itamar Procaccia 1
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The nature of an instability that controls the transition from static to dynamical friction is studied in the context of an array of frictional disks that are pressed from above on a substrate. In this case the forces are all explicit and Newtonian dynamics can be employed without any phenomenological assumptions. We show that an oscillatory instability that had been discovered recently is responsible for the transition, allowing individual disks to spontaneously reach the Coulomb limit and slide with dynamic friction. The transparency of the model allows a full understanding of the phenomenon, including the speeds of the waves that travel from the trailing to the leading edge and vice versa.
中文翻译：
摩擦磁盘阵列中从静态摩擦到动态摩擦的过渡。
在一系列从上方压在基板上的摩擦盘的背景下，研究了控制从静态摩擦到动态摩擦的不稳定性的性质。在这种情况下，力全部是显性的，并且可以在没有任何现象学假设的情况下采用牛顿动力学。我们表明，最近发现的振荡不稳定性是造成过渡的原因，它使单个磁盘自发地达到库仑极限并通过动态摩擦滑动。模型的透明性使您可以完全理解该现象，包括从后缘到前缘的波速，反之亦然。
更新日期：2020-01-24
中文翻译：
摩擦磁盘阵列中从静态摩擦到动态摩擦的过渡。
在一系列从上方压在基板上的摩擦盘的背景下，研究了控制从静态摩擦到动态摩擦的不稳定性的性质。在这种情况下，力全部是显性的，并且可以在没有任何现象学假设的情况下采用牛顿动力学。我们表明，最近发现的振荡不稳定性是造成过渡的原因，它使单个磁盘自发地达到库仑极限并通过动态摩擦滑动。模型的透明性使您可以完全理解该现象，包括从后缘到前缘的波速，反之亦然。
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