The Coupled Theory of Mixtures in Geomechanics with Applications

ISBN-13: 9783540251309 / Angielski / Twarda / 2006 / 433 str.

George Z. Voyiadjis; C. R. Song; G. Z. Voyiadjis

Opis

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.

Spis treści

Flow in Geo-materials.- Coupled Theory of Mixtures.- Coupling Yield Criteria and Micro-mechanics with the Theory of Mixtures.- Finite Element Formulations.- Applications.- Advanced Topics.

Blurb

This book contains recent advances on theory of mixtures in geo-mechanics. It presents all the necessary material that is published and scattered in different journals. The book presents both basic principles and advanced topics. It includes a chapter on comparison of theoretical and experimental results. The first part of the book deals with the historic reviews, hydro-mechanics of geo-materials, and the fundamental theory of mixtures. The second part of the book deals with the Coupling Theory, Numerical Simulations, and Applications in real structures. The third part of the book deals with advanced topics such as unsaturated soils and theory of mixtures for non geo-materials. The book can be used as a textbook for an advanced course on geo-mechanics and geotechnical engineering.