Localization analysis of a fluid-saturated elastoplastic porous medium using regularized discontinuities

In the present payer we analyse the conditions for band-shaped localization to occur in the hydromechanically coupled problem. The governing continuum equations are based on the porous media theory applied to an elastic-plast ic solid (skeleton) at small deformations. In the localization analysis, th e concept of regularized discontinuity is extensively used at the applicati on to the conservation laws of momentum and mass. As a result, we obtain a coupled localization condition, where the situation of partly drained condi tions is discussed and compared to the two extreme cases of fully drained a nd undrained situations. A simple numerical experiment for a 1D problem is carried out using an interface FE-formulation. Copyright (C) 2000 John Wile y & Sons, Ltd.