Difference between revisions of "Stress Enhancement in the Delayed Yielding of Colloidal Gels"
From Soft-Matter
| Line 1: | Line 1: | ||
| + | [[Image:Fig1_Stress_Enhancement.jpg|600px|right|thumb|]] | ||
| + | |||
== 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 | ||
| Line 6: | Line 8: | ||
quantitatively describes this behavior and highlights the role of mesoscopic structures. Our result gives | quantitatively describes this behavior and highlights the role of mesoscopic structures. Our result gives | ||
new insight into the nature of yielding in these soft solid materials. | new insight into the nature of yielding in these soft solid materials. | ||
| − | |||
| − | |||
Revision as of 17:53, 11 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. We show 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. We present a bond-rupture model that quantitatively describes this behavior and highlights the role of mesoscopic structures. Our result gives new insight into the nature of yielding in these soft solid materials.
