Continuum damage modelling in geomechanics
Continuum damage mechanics is a framework for describing the variations of the elastic properties of a material due to microstructural degradations. This chapter presents the application of this theory to the modelling of concrete. Several constitutive re
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Series Editors: The Rectors Manuel Garcia Velarde - Madrid Jean Salen~on- Palaiseau Wilhelm Schneider - Wien
The Secretary General Bernhard Schrefter - Padua
Executive Editor Carlo Tasso- Udine
The series presents lecture notes, monographs, edited works and proceedings in the field of Mechanics, Engineering, Computer Science and Applied Mathematics. Purpose of the series is to make known in the international scientific and technical community results obtained in some of the activities organized by CISM, the International Centre for Mechanical Sciences.
INTERNATIONAL CENTRE FOR MECHANICAL SCIENCES COURSES AND LECTURES- No 461
DEGRADATIONS AND INSTABILITIES IN GEOMATERIALS
a DIGA RTN sponsored course EDITED BY FELIXDARVE INSTITUT NATIONAL POLYTECHNIQUE DE GRENOBLE JOANNIS VARDOULAKIS NATIONAL TECHNICAL UNIVERSITY OF ATHENS
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Springer-Verlag Wien GmbH
The publication of this volume was co-sponsored and co-financed by the UNESCO Venice Office - Regional Bureau for Science in Europe (ROSTE) and its content corresponds to a CISM Advanced Course supported by the same UNESCO Regional Bureau.
This volume contains 208 illustrations
This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concemed specifically those of translation, reprinting, re-use of illustrations, broadcasting, reproduction by photocopying machine or similar means, and storage in data banks. © 2004 by Springer-Verlag Wien Originally published by Springer-Verlag Wien New York in 2004
SPIN 11006794
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ISBN 978-3-211-21936-2 DOI 10.1007/978-3-7091-2768-1
ISBN 978-3-7091-2768-1 (eBook)
PREFACE Degradation phenomena in geomaterials are linked to cyclic loading, ageing, weathering, internal erosion, capillary effects, etc. They can be treated today successfully within the frame of constitutive theories, which account for elasto-thermovisco-plastic or damage effects, anisotropy, non-coaxiality and they are often extended so as to incorporate incremental non-linearity, non-local, second gradient and/or Cosserat effects. In addition the existing continuum chemo-mechanics framework can be utilized by assuming specific expressions for the chemical potentials and by identifying the relevant chemo-stress effects on the basis of the dominant physicochemical mechanisms for concrete and rocks. Nowadays it is recognized that there is a large variety of bifurcations and instabilities of material and/or of geometric nature, which are leading to various modes of failure, strictly inside the domain in stress-space which is bounded by the empirical "Mohr-Coulomb" failure criterion, but also inside the domain defined by the localization condition of plastic-strain or damage. The existence of such instabilities has been conjectured from the theory of n
