ABSTRACT
The reduced state of the deviatoric stress tensor, gii, is the algebraic difference between su, and the weighted value of s and the a, J2 and 13 are reduced stress invariants defined in the same way as the stress invariants 0, J2 and J3 in terms of
These yield surfaces are distorted ellipsoids asymmetrically oriented along the initial consolidation line (K0-line for natural soils) in the principal stress space (Fig. 1) which appear as distorted ellipsi in a p-q
FIG 1. A schematic representation of the yield surface in principal stress space.
