Stress enhancement in the delayed yielding of colloidal gels

Citation:

Sprakel, J. ; Lindstroem, S. B. ; Kodger, T. E. ; Weitz, D. A. Stress enhancement in the delayed yielding of colloidal gels. Physical Review Letters 2011, 106. Copy at http://www.tinyurl.com/k3rn5yx
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Abstract:

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.

Notes:

Times Cited: 8

Last updated on 04/16/2014