ar X iv : c on d - m at / 9 60 20 62 v 1 1 1 Fe b 19 96 PHASE TRANSITIONS IN GRANULAR PACKINGS
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چکیده
We describe the contact network of granular packings by a frustrated lattice gas that contains steric frustration as esential ingredient. Two transitions are identified, a spin glass transition at the onset of Reynolds dilatancy and at lower densities a percolation transition. We describe the correlation functions that give rise to the singularities and propose some dynamical experiments. Let us consider a packing of granular material, like sand or powder, at rest. Depending on how the packing has been prepared its density and its rheological properties can be 1
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تاریخ انتشار 1996