Dynamics of sheared granular
Collaborators: J. Gollub, W.
Losert, S. Nasuno, A. Kudrolli, A. Bak, J.-C. Geminard, and
Sensitive measurements of the frictional force and dilation are
performed on sheared granular layers with fast time resolution and
simultaneous optical imaging.
Schematic diagram of the apparatus, showing the
granular layer E and a transparent cover plate G pushed by a
leaf spring C connected to a translating stage A. Two
inductive sensors B1 and B2 detect the deflection of the
leaf spring and dilation of the granular layer. The
microscope objective D is also shown.
Stick-slip dynamics occurs for low imposed velocity of the top
layer, with a transition to continuous motion at a higher velocity.
Several studies carried out on this system:
This work was highlighted in Physics
Today, September 1997, p. 17.
- Fast camera imaging of slip events
- Binary particle mixtures
to Nonlinear Physics Lab home page.
Last modified on 11/17/99.