The jamming surface of granular matter Determined from soil mechanics results


P. Evesque: Lab MSSM, UMR 8579 CNRS, Ecole Centrale Paris, 92295 Châtenay-Malabry, France,


Abstract: Classical soil mechanics results are used to propose the equation of the jamming transition surface in the (s', 1/r=v) space, where r is the density, v the specific volume and s' the stress really supported by the grain structure. Taking axi-symmetric conditions, labelling q= s'11- s'22 and p'=(s'11+ s'22+ s'33)/3, and considering normal range of pressure (10 kPa-10MPa) the equation of the surface of jamming transition is v=vo-l ln(p'/p'o)+ ld ln(1+q²/(M'p')²); M' is related to the friction angle j, l and ld are two constants which depend on soil characteristics.

poudres & grains 11 (4), 58-59 ( décembre 2 000)