Shear banding, aging and noise dynamics in soft glassy materials

Details Shear banding, aging and noise dynamics in soft glassy materials Shear banding, aging and noise dynamics in soft glassy materials

2008-12-17

arxiv.org/abs/0812.3300v1

Soft Matter, 2009

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 4 figures included

Scientific paper

10.1039/b812394m

The `soft glassy rheology' (SGR) model gives an appealing account of the flow of nonergodic soft materials in terms of the local yield dynamics of mesoscopic elements. Newtonian, power-law, and yield-stress fluid regimes arise on varying a `noise temperature', x. Here we extend the model, to capture the idea that the noise is largely caused by yield itself. The extended model can account for the viscosity-bifurcation and shear-banding effects reported recently in a wide range of soft materials. A variant model may shed light on shear banding and strain-rate hysteresis seen in glassy star polymer solutions.

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