The Coupled Theory of Mixtures in Geomechanics with Applications

The Coupled Theory of Mixtures in Geomechanics with Applications
Author :
Publisher : Springer Science & Business Media
Total Pages : 443
Release :
ISBN-10 : 9783540346609
ISBN-13 : 3540346600
Rating : 4/5 (600 Downloads)

Book Synopsis The Coupled Theory of Mixtures in Geomechanics with Applications by : George Z Voyiadjis

Download or read book The Coupled Theory of Mixtures in Geomechanics with Applications written by George Z Voyiadjis and published by Springer Science & Business Media. This book was released on 2006-08-06 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geomaterials consist of a mixture of solid particles and void space that may be ?lled with ?uid and gas. The solid particles may be di?erent in sizes, shapes, and behavior; and the pore liquid may have various physical and chemical properties. Hence, physical, chemical or electrical interaction - tween the solid particles and pore ?uid or gas may take place. Therefore, the geomaterials in general must be considered a mixture or a multiphase material whose state is described by physical quantities in each phase. The stresses carried by the solid skeleton are typically termed “e?ective stress” while the stresses carried by the pore liquid are termed “pore pressure. ” The summation of the e?ective stress and pore pressure is termed “total stress” (Terzaghi, 1943). For a free drainage condition or completely undrained c- dition, the pore pressure change is zero or depends only on the initial stress condition; it does not depend on the skeleton response to external forces. Therefore, a single phase description of soil behavior is adequate. For an intermediate condition, however, some ?ow (pore pressure leak) may take place while the force is applied and the skeleton is under deformation. Due to the leak of pore pressure, the pore pressure changes with time, and the e?ective stress changes and the skeleton deforms with time accordingly. The solution of this intermediate condition, therefore, requires a multi-phase c- tinuum formulations that may address the interaction of solid skeleton and pore liquid interaction.


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