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- K N Nordstrom, E Verneuil, W G Ellenbroek, T C Lubensky, J P Gollub, D J Durian
- Physical review. E, Statistical, nonlinear, and…
- 2010

An exact method is developed for computing the height of an elastic medium subjected to centrifugal compression, for arbitrary constitutive relation between stress and strain. Example solutions are obtained for power-law media and for cases where the stress diverges at a critical strain--for example as required by packings composed of deformable but… (More)

A few years ago a " jamming diagram " has been proposed as a nonequilibrium phase diagram to describe the physics of glass transitions and granular materials in a unified way. Granular systems " jam " , i.e. develop a yield stress, when their packing fraction reaches a certain critical value upon compression. At zero temperature and load, this transition… (More)

- David A Christian, Aiwei Tian, +6 authors Dennis E Discher
- Nature materials
- 2009

Selective binding of multivalent ligands within a mixture of polyvalent amphiphiles provides, in principle, a simple mechanism for driving domain formation in self-assemblies. Divalent cations are shown here to crossbridge polyanionic amphiphiles, which thereby demix from neutral amphiphiles and form spots or rafts within vesicles as well as stripes within… (More)

- Jacco H Snoeijer, Thijs J H Vlugt, Wouter G Ellenbroek, Martin van Hecke, J M J van Leeuwen
- Physical review. E, Statistical, nonlinear, and…
- 2004

An ensemble approach for force networks in static granular packings is developed. The framework is based on the separation of packing and force scales, together with an a priori flat measure in the force phase space under the constraints that the contact forces are repulsive and balance on every particle. In this paper we will give a general formulation of… (More)

- Wouter G Ellenbroek, Ellák Somfai, Martin van Hecke, Wim van Saarloos
- Physical review letters
- 2006

We study the origin of the scaling behavior in frictionless granular media above the jamming transition by analyzing their linear response. The response to local forcing is non-self-averaging and fluctuates over a length scale that diverges at the jamming transition. The response to global forcing becomes increasingly nonaffine near the jamming transition.… (More)

- Adrianne R T van Eerd, Wouter G Ellenbroek, Martin van Hecke, Jacco H Snoeijer, Thijs J H Vlugt
- Physical review. E, Statistical, nonlinear, and…
- 2007

We numerically study the distribution P(f) of contact forces in frictionless bead packs, by averaging over the ensemble of all possible force network configurations. We resort to umbrella sampling to resolve the asymptotic decay of P(f) for large f , and determine P(f) down to values of order 10{-45} for ordered and disordered systems in two (2D) and three… (More)

- Jacco H Snoeijer, Wouter G Ellenbroek, Thijs J H Vlugt, Martin van Hecke
- Physical review letters
- 2006

A scenario for the yielding of granular matter is presented by considering the ensemble of force networks for a given contact network and applied shear stress tau. As tau is increased, the probability distribution of contact forces becomes highly anisotropic, the difference between average contact forces along minor and major axes grows, and the allowed… (More)

- Ellák Somfai, Martin van Hecke, Wouter G Ellenbroek, Kostya Shundyak, Wim van Saarloos
- Physical review. E, Statistical, nonlinear, and…
- 2007

We probe the nature of the jamming transition of frictional granular media by studying their vibrational properties as a function of the applied pressure p and friction coefficient mu. The density of vibrational states exhibits a crossover from a plateau at frequencies omega > or similar to omega*(p,mu) to a linear growth for omega < or similar to… (More)

- Ke Chen, Wouter G Ellenbroek, +8 authors A G Yodh
- Physical review letters
- 2010

We conduct experiments on two-dimensional packings of colloidal thermosensitive hydrogel particles whose packing fraction can be tuned above the jamming transition by varying the temperature. By measuring displacement correlations between particles, we extract the vibrational properties of a corresponding "shadow" system with the same configuration and… (More)

- W. G. Ellenbroek, Z. Zeravcic, W. van Saarloos, M. van Hecke
- 2009

– We compare the elastic response of spring networks whose contact geometry is derived from real packings of frictionless discs, to networks obtained by randomly cutting bonds in a highly connected network derived from a well-compressed packing. We find that the shear response of packing-derived networks, and both the shear and compression response of… (More)