| Abstract: | To increase the insight into the phenomenon of liquefaction a theoretical study has been performed of material instability for undrained behaviour. Material instability concerns the instability of an equilibrium state of an infinite homogeneous solid for both uniform deformation and shear-band generation. In a companion paper shear-band generation has been considered. In this paper the case of uniform deformation is elaborated and combined with the previous results. It can be concluded that instability occurs sooner for increasing contraction and decreasing drainage. For zero plastic volume change and decreasing drainage the mode of instability changes from drained shear-band generation to undrained uniform deformation. For contractant materials the instability of undrained behaviour is mainly due to uniform deformation. |
