Experiments Find Hysteresis and Precursors in the Stick-Slip Friction of a Granular System
- 1 September 1997
- journal article
- research article
- Published by AIP Publishing in Physics Today
- Vol. 50 (9) , 17-19
- https://doi.org/10.1063/1.881930
Abstract
What happens to a granular layer as you increase an applied shear force? In a recent experiment at Haverford College, Satoru Nasuno, Arshad Kudrolli and Jerry Gollub were able to image the particle dynamics directly. Their paper, published in the 4 August issue of Physical Review Letters, describes a stick‐slip behavior at low velocity gradients across the layer, with a transition to continuous motion at higher velocity gradients. Furthermore, within individual slip events, they found that the frictional force is a multivalued function of the velocity. Do laboratory studies of friction in a variety of systems have similar behavior?Keywords
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