GRANULAR SHEAR FLOWS – CONSTITUTIVE RELATIONS AND INTERNAL STRUCTURES

Abstract eng:
Granular shear flows can behave as a rate-independent (plastic) or rate-dependent (non-Newtonian viscous) material. Most of the real granular flows may lie in the regime between these two extremes. While kinetic theory captures the constitutive behavior of the inertia dominant regime, in which stress depends on the square of the strain-rate, there is no theory that explains the transitional behavior. This paper presents a conceptual theory that describes the importance of the internal structure in the transitional regime for granular materials.

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