Structures, stresses, and fluctuations in the delayed failure of colloidal gels

  title={Structures, stresses, and fluctuations in the delayed failure of colloidal gels},
  author={Stefan B. Lindstr{\"o}m and Thomas E. Kodger and Joris Sprakel and David A. Weitz},
  journal={Soft Matter},
Sample-spanning networks of aggregated colloidal particles have a finite stiffness and deform elastically when subjected to a small shear stress. After some period of creep, these gels ultimately suffer catastrophic failure. This delayed yielding is governed by the association and dissociation dynamics of interparticle bonds and the strand structure of the gel. We derive a model which connects the kinetics of the colloids to the erosion of the strand structure and ultimately to macroscopic… 

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