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论文类型：期刊论文

发表时间：2006-01-01

发表刊物：INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS

收录刊物：SCIE、EI

卷号：30

期号：1

页面范围：45-70

ISSN号：0363-9061

关键字：strain localization; saturated and partially saturated porous media; gradient-dependent plasticity; internal length scale

摘要：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 (c) 2005 John Wiley & Sons, Ltd.