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Avalanche of mustard seeds
Avalanche of mustard seeds
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Granular materials react to shear stresses
differently than do ordinary fluids. Rather
than deforming uniformly, materials such
as dry sand or cohesionless powders develop
shear bands: narrow zones containing large
relative particle motion leaving adjacent
regions essentially rigid. Since shear
bands mark areas of flow, material failure
and energy dissipation, they play a crucial
role for many industrial, civil engineering
and geophysical processes. (More).