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An interal length scale in dynamic strain localization of multiphase porous media

✍ Scribed by H. W. Zhang; L. Sanavia; B. A. Schrefler

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 225 KB
Volume: 4
Category: Article
ISSN: 1082-5010
DOI: 10.1002/(sici)1099-1484(199909)4:5<443::aid-cfm69>3.0.co;2-6

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✦ Synopsis

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 #uid 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.

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