Interaction between different internal length scales in strain localization analysis of fully and partially saturated porous media - The 1-D case

Bernhard A. Schrefler, H. W. Zhang, L. Sanavia

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)45-70
Number of pages26
JournalInternational Journal for Numerical and Analytical Methods in Geomechanics
Volume30
Issue number1
DOIs
StatePublished - Jan 1 2006

Keywords

  • Gradient-dependent plasticity
  • Internal length scale
  • Saturated and partially saturated porous media
  • Strain localization

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Materials Science(all)
  • Mechanics of Materials
  • Computational Mechanics

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