The jamming surface of granular matter Determined from soil mechanics results

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**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=v_{o}-l ln(p'/p'_{o})+ l_{d}
ln(1+q²/(M'p')²); M' is related to the friction angle j, l and l_{d} are two
constants which depend on soil characteristics.

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

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