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论文类型：期刊论文

发表时间：1999-09-01

发表刊物：MECHANICS OF COHESIVE-FRICTIONAL MATERIALS

收录刊物：Scopus、SCIE

卷号：4

期号：5

页面范围：443-460

ISSN号：1082-5010

关键字：multiphase materials; stability analysis; strain softening; strain localization; internal length scale

摘要：In this paper, a length scale included in multiphase materials such as saturated and partially saturated porous media is discussed, where the viscous terms are introduced naturally by the fluid mass balance equations. The discussion is limited to the dynamic case. The characteristic stability equation is given in explicit form for one-dimensional wave propagation. It is shown that for axial waves a wave number domain exists for which the material model is dispersive when softening behaviour occurs for solid skeleton and that an internal length scale can be derived, while for ideal shear propagation this is not the case. Numerical examples are given to corroborate the validity of the expressions derived. Copyright (C) 1999 John Wiley & Sons, Ltd.