Difference between revisions of "Stress Enhancement in the Delayed Yielding of Colloidal Gels"
From Soft-Matter
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== Introduction == | == Introduction == | ||
| − | Networks of aggregated colloidal particles are solidlike and can sustain an applied shear stress while | + | Networks of aggregated colloidal particles are solidlike and can sustain an applied shear stress while exhibiting little or no creep; however, ultimately they will catastrophically fail. It is shown here that the time delay for this yielding decreases in two distinct exponential regimes with applied stress. This behavior is universal and found for a variety of colloidal gel systems. A bond-rupture model is presented that quantitatively describes this behavior and highlights the role of mesoscopic structures, giving new insight into the nature of yielding in these soft solid materials. |
| − | exhibiting little or no creep; however, ultimately they will catastrophically fail. | + | |
| − | delay for this yielding decreases in two distinct exponential regimes with applied stress. This behavior is | + | |
| − | universal and found for a variety of colloidal gel systems. | + | |
| − | quantitatively describes this behavior and highlights the role of mesoscopic structures | + | |
| − | new insight into the nature of yielding in these soft solid materials. | + | |
Revision as of 04:58, 12 September 2011
Introduction
Networks of aggregated colloidal particles are solidlike and can sustain an applied shear stress while exhibiting little or no creep; however, ultimately they will catastrophically fail. It is shown here that the time delay for this yielding decreases in two distinct exponential regimes with applied stress. This behavior is universal and found for a variety of colloidal gel systems. A bond-rupture model is presented that quantitatively describes this behavior and highlights the role of mesoscopic structures, giving new insight into the nature of yielding in these soft solid materials.
