On Jaky constant of oedometers, Rowe's relation and incremental modeling

Details On Jaky constant of oedometers, Rowe's relation and incremental modeling On Jaky constant of oedometers, Rowe's relation and incremental modeling

2005-06-14

arxiv.org/abs/cond-mat/0506335v1

Poudres & Grains 6, 1-9 (1999)

Physics

Condensed Matter

Soft Condensed Matter

9 pages, 1 figure

Scientific paper

It is recalled that stress-strain incremental modelling is a common feature of most theoretical description of the mechanical behaviour of granular material. An other commonly accepted characteristics of the mechanical behaviour of granular material is the Rowe's relation which links the dilatancy K to the ratio B of vertical to lateral stress during a test at constant lateral stress, i.e. B=(1+M)(1+K). We combine these two features and extract an incremental pseudo-Poisson coefficient which varies with the stress ratio . We solve the oedometric-test case, starting from isotropic sample and stress, for which the vertical stress is increased continuously. It is found that the stress ratio B evolves towards an asymptotic value ko which depends on the friction angle only. It is shown that this asymptotic value ko compares well with the experimental fit known as the Jaky constant.

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