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- Sprakel, Joris, et al.
(author)
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Stress enhancement in the delayed yielding of colloidal gels
- 2011
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In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 106:24, s. 248303-
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Journal article (peer-reviewed)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.
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