Shear zone ↩

Metadata 
aliases: [shear zone]
shorthands: {}
created: 2022-07-08 16:55:27
modified: 2022-07-08 17:07:31

In granular materials, when we shear the material, we do not get a linear velocity profile, like in Newtonian liquids.

Instead, the velocity gradient only appears in a smaller domain of the material's volume. This zone is called the shear zone.

Shape

It's shape usually depends on the shape of the shearing walls. For example in a split bottom box, the shear zone becomes vertical, widening as going upwards. For example, from :1

Time evolution

The shape and size of this zone can slightly change with time. This have not been found in real world experiments, only in simulations.

An example of this can be seen here (the black patch is the shearing zone):

And the same example with the particles visible:

  1. Szabó, B., Török, J., Somfai, E., Wegner, S., Stannarius, R., Böse, A., Rose, G., Angenstein, F. and Börzsönyi, T., 2014. Evolution of shear zones in granular materials. Physical Review E, 90(3), p.032205.
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