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Interaction between different internal length scales in strain localization analysis of fully and partially saturated porous media—the 1‐D case
Author(s) -
Schrefler B.A.,
Zhang H.W.,
Sanavia L.
Publication year - 2006
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.474
Subject(s) - porous medium , porosity , plasticity , mechanics , darcy's law , internal pressure , multiphase flow , pressure gradient , materials science , geotechnical engineering , pore water pressure , geology , physics , composite material
The paper analyses the interaction between two internal length scales during dynamic strain localization in multiphase porous materials. The first internal length is introduced in the mathematical model by the gradient‐dependent plasticity for the solid skeleton, while the second one is naturally contained in the multiphase model and is due to the seepage process of the water via Darcy's law, which induces a rate‐dependent behaviour of the solid skeleton. Numerical results of a one‐dimensional example of water saturated porous medium demonstrate the competing effect between these two length scales. The porous medium is here treated as a multiphase continuum, with the pores filled by water and air, the last one at constant atmospheric pressure. Copyright © 2005 John Wiley & Sons, Ltd.