Fundamentals of Plasticity in Geomechanics

Fundamentals of Plasticity in Geomechanics
Author: S. Pietruszczak
Publsiher: CRC Press
Total Pages: 206
Release: 2020-06-30
ISBN: 9780367577148
Category: Continuum mechanics
Language: EN, FR, DE, ES & NL

Fundamentals of Plasticity in Geomechanics Book Excerpt:

This comprehensive text that covers the fundamentals of plasticity in relation to geomechanics. It gives a general background in soil/rock plasticity and an introduction to inelastic response of geomaterials. It is primarily for graduate students and practising engineers familiar with contemporary continuum mechanics.

Plasticity and Geomechanics

Plasticity and Geomechanics
Author: R. O. Davis,A. P. S. Selvadurai
Publsiher: Cambridge University Press
Total Pages: 135
Release: 2005-08-22
ISBN: 113943652X
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Plasticity and Geomechanics Book Excerpt:

Plasticity theory is widely used to describe the behaviour of soil and rock in many engineering situations. Plasticity and Geomechanics presents a concise introduction to the general subject of plasticity with a particular emphasis on applications in geomechanics. Derived from the authors' own lecture notes, this book is written with students firmly in mind. Excessive use of mathematical methods is avoided in the main body of the text and, where possible, physical interpretations are given for important concepts. In this way the authors present a clear introduction to the complex ideas and concepts of plasticity as well as demonstrating how this developing subject is of critical importance to geomechanics and geotechnical engineering. This book therefore complements Elasticity and Geomechanics by the same authors and will appeal to graduate students and researchers in the fields of soil mechanics, foundation engineering, and geomechanics.

Notes on Geoplasticity

Notes on Geoplasticity
Author: William G. Pariseau
Publsiher: CRC Press
Total Pages: 232
Release: 2019-11-25
ISBN: 0429766491
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Notes on Geoplasticity Book Excerpt:

This book is about geoplasticity, solid mechanics of rock, jointed rock and soil beyond the domain of a purely elastic deformation. Plastic deformation is irreversible and begins at the limit to elasticity with any attempt at further loading. Stress at the limit to elasticity is "strength" which is described by a functional relationship amongst stresses, that is, by a yield function or failure criterion. Mohr-Coulomb, Drucker-Prager and Hoek-Brown criteria are well-known examples in geomechanics. Beyond the elastic limit, but still within the realm of small strain increments, a total strain increment is the sum of an elastic increment and a plastic increment. The elastic increment is computed through an incremental form of Hooke’s law, isotropic or anisotropic as the case may be. Computation of the plastic part is at the core of any plasticity theory and is approached through the concept of a plastic potential. The plastic potential is a function of stresses and perhaps other material parameters such as plastic strain and temperature. Derivatives of the plastic potential with respect to stress lead to the plastic part of the total strain increment. If the yield criterion and plastic potential are the same, then the plastic stress-strain relationships are "associated rules of flow" and follow a "normality" principle. Normality is in reference to a graphical portrayal in principal stress space where the plastic strain increment is perpendicular to the yield surface. If the plastic potential and yield criterion are different, as is often the case in geoplasticity, then the rules of flow are "non-associated". Drucker’s famous stability postulate implies normality at a smooth point on the yield surface, convexity of the yield function and other important features of plasticity theory in geomechanics. However, there is no point to proceeding to theoretical analyses without physical justification. Hence, the physical foundations for application of plasticity theory to rock, jointed rock and soil are examined in Chapter 2 of this book. A brief review of continuum mechanics principles is given in Chapter 3. Chapter 4 focuses on plane plastic strain and "sliplines". The technical literature is replete with numerous diagrams of sliplines, especially in discussions of foundations on soils, but the relevant mathematics is often lacking and with it genuine understanding. Examples illustrate application of theory to traditional geomechanics problems such as computation of retaining wall forces in soils, foundation bearing capacity of soil and rock, wedge penetration of rock under confining pressure and others. Brief discussions of anisotropy, visco-plasticity and poro-plasticity are presented in Chapters 6, 7 and 8. This book will be of interest to civil, geological and mining engineers, particularly those involved in reliable design of excavations and foundations beyond elasticity, especially in jointed rock.

Thermo Poroelasticity and Geomechanics

Thermo Poroelasticity and Geomechanics
Author: A. P. S. Selvadurai,A. P. Suvorov
Publsiher: Cambridge University Press
Total Pages: 268
Release: 2017
ISBN: 110714289X
Category: Science
Language: EN, FR, DE, ES & NL

Thermo Poroelasticity and Geomechanics Book Excerpt:

A full account of thermo-poroelasticity and thermo-poromechanics with derivations to problems, for both experienced and novice researchers.

Transport Phenomena in Porous Media

Transport Phenomena in Porous Media
Author: Yasuaki Ichikawa,A.P.S. Selvadurai
Publsiher: Springer Science & Business Media
Total Pages: 384
Release: 2012-02-10
ISBN: 3642253334
Category: Science
Language: EN, FR, DE, ES & NL

Transport Phenomena in Porous Media Book Excerpt:

This monograph presents an integrated perspective of the wide range of phenomena and processes applicable to the study of transport of species in porous materials. In order to formulate the entire range of porous media and their uses, this book gives the basics of continuum mechanics, thermodynamics, seepage and consolidation and diffusion, including multiscale homogenization methods. The particular structure of the book has been chosen because it is essential to be aware of the true properties of porous materials particularly in terms of nano, micro and macro mechanisms. This book is of pedagogical and practical importance to the fields covered by civil, environmental, nuclear and petroleum engineering and also in chemical physics and geophysics as it relates to radioactive waste disposal, geotechnical engineering, mining and petroleum engineering and chemical engineering.

Radioactive Waste Confinement

Radioactive Waste Confinement
Author: S. Norris,J. Bruno,M. Van Geet ,E. Verhoef
Publsiher: Geological Society of London
Total Pages: 376
Release: 2017-05-04
ISBN: 1786202735
Category: Science
Language: EN, FR, DE, ES & NL

Radioactive Waste Confinement Book Excerpt:

It is internationally accepted that the safest and most sustainable option for managing radioactive waste is geological disposal, utilizing both engineering and geology to isolate the waste and contain the radioactivity. This Special Publication contains 25 scientific studies presented at the 6th conference on ‘Clays in natural and engineered barriers for radioactive waste confinement’ held in Brussels, Belgium in 2015. The conference and this resulting volume cover many of the aspects of clay characterization and behaviour considered at various temporal and spatial scales relevant to the confinement of radionuclides in clay, from basic phenomenological process descriptions to the global understanding of performance and safety at repository and geological scales. The papers in this volume consider research into argillaceous media under the following topic areas: large-scale geological characterization; general strategy for clay-based disposal systems; geomechanics; mass transfer; bentonite evolution and gas transfer. The collection of different topics presented in this Special Publication demonstrates the diversity of geological repository research.

On the role of constitutive behaviour in the response of squeezing ground to tunnelling

On the role of constitutive behaviour in the response of squeezing ground to tunnelling
Author: Weijie Dong
Publsiher: vdf Hochschulverlag AG
Total Pages: 205
Release: 2017-08-14
ISBN: 3728138606
Category: Electronic Book
Language: EN, FR, DE, ES & NL

On the role of constitutive behaviour in the response of squeezing ground to tunnelling Book Excerpt:

Squeezing conditions in tunnelling are characterized by the occurrence of large deformations of the opening or high rock pressure that may overstress the lining. Squeezing is associated with poor quality rock. Tunnelling in squeezing ground involves great uncertainties. It is therefore very important to gain a better understanding of the underlying mechanisms. Triaxial testing is the main source of information in order to understand the mechanical features of squeezing ground. Despite the complexity of the squeezing mechanism and the behaviour observed under relatively simple loading conditions, most of previous research work and engineering design practice considers the ground as a linearly elastic, perfectly plastic material obeying the Mohr-Coulomb yield criterion. While the MC model is capable of predicting the final strength and post-failure volumetric behaviour of the squeezing rock, it cannot map some potentially important pre-failure features or the occasionally observed contractant plastic deformation. In addition, the MC model usually leads to an overestimation of the strength under undrained conditions, which is unsafe for tunnel design. The present thesis mainly addresses the influence of constitutive modelling on predictions about the response of squeezing ground to tunnelling in order to provide some general guidelines for basic engineering analysis. This objective is achieved by investigating the behaviour of squeezing rocks theoretically and experimentally, using samples from several tunnel projects, including the Gotthard base tunnel and the planned Gibraltar strait tunnel.

The Evolution of Geotech 25 Years of Innovation

The Evolution of Geotech   25 Years of Innovation
Author: Reginald Hammah,Thamer Yacoub,Alison McQuillan,John Curran
Publsiher: CRC Press
Total Pages: 690
Release: 2021-11-24
ISBN: 1000521117
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

The Evolution of Geotech 25 Years of Innovation Book Excerpt:

This publication includes 82 technical papers presented at Rocscience International Conference (RIC) 2021, held online on April 20 and 21, 2021. Rocscience created this event to bring geotechnical academics, researchers and practitioners together to exchange ideas as part of celebrating 25 years of the company’s existence. The papers in these proceedings were from keynotes, panel discussions and papers, selected after careful review of over 100 technical submissions delivered at RIC 2021. The technical papers were grouped into sessions based on their subject areas. The conference aimed to stimulate discussions that could help the industry work towards overcoming geotechnical engineering limitations today. It also sought to foster creative thinking that will advance the current states of the art and practice. The keynote addresses, panel discussions and technical presentations tried to examine geotechnical problems and situations from fresh perspectives. RIC 2021 hopes that the proceedings will continue to enrich our thinking and contribute to achieving a critical mass of change in our practices and approaches. We look forward to significant improvements in our industry.

Rock Mechanics for Resources Energy and Environment

Rock Mechanics for Resources  Energy and Environment
Author: Marek Kwasniewski,Dariusz Lydzba
Publsiher: CRC Press
Total Pages: 1000
Release: 2013-09-11
ISBN: 1482229072
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Rock Mechanics for Resources Energy and Environment Book Excerpt:

This book contains the Proceedings of EUROCK 2013 - The 2013 ISRM International Symposium, which was held on 23-26 September 2013 in Wroclaw, Poland. The Symposium was organized by the ISRM National Group POLAND and the Institute of Geotechnics and Hydrotechnics of the Wroclaw Institute of Technology. The focus of the Symposium was on recent develo

Analytical Methods in Petroleum Upstream Applications

Analytical Methods in Petroleum Upstream Applications
Author: Cesar Ovalles,Carl E. Rechsteiner Jr.
Publsiher: CRC Press
Total Pages: 337
Release: 2015-04-02
ISBN: 1138001481
Category: Science
Language: EN, FR, DE, ES & NL

Analytical Methods in Petroleum Upstream Applications Book Excerpt:

Effective measurement of the composition and properties of petroleum is essential for its exploration, production, and refining; however, new technologies and methodologies are not adequately documented in much of the current literature. Analytical Methods in Petroleum Upstream Applications explores advances in the analytical methods and instrumentation that allow more accurate determination of the components, classes of compounds, properties, and features of petroleum and its fractions. Recognized experts explore a host of topics, including: A petroleum molecular composition continuity model as a context for other analytical measurements A modern modular sampling system for use in the lab or the process area to collect and control samples for subsequent analysis The importance of oil-in-water measurements and monitoring The chemical and physical properties of heavy oils, their fractions, and products from their upgrading Analytical measurements using gas chromatography and nuclear magnetic resonance (NMR) applications Asphaltene and heavy ends analysis Chemometrics and modeling approaches for understanding petroleum composition and properties to improve upstream, midstream, and downstream operations Due to the renaissance of gas and oil production in North America, interest has grown in analytical methods for a wide range of applications. The understanding provided in this text is designed to help chemists, geologists, and chemical and petroleum engineers make more accurate estimates of the crude value to specific refinery configurations, providing insight into optimum development and extraction schemes.

Principles of Hyperplasticity

Principles of Hyperplasticity
Author: Guy T. Houlsby,Alexander M. Puzrin
Publsiher: Springer Science & Business Media
Total Pages: 351
Release: 2007-04-18
ISBN: 1846282403
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Principles of Hyperplasticity Book Excerpt:

The approach to plasticity theory developed here is firmly rooted in thermodynamics. Emphasis is placed on the use of potentials and the derivation of incremental response, necessary for numerical analysis. The derivation of constitutive models for irreversible behaviour entirely from two scalar potentials is shown. The use of potentials allows models to be very simply defined, classified and, if necessary, developed and it permits dependent and independent variables to be interchanged, making possible different forms of a model for different applications. The theory is extended to include treatment of rate-dependent materials and a powerful concept, in which a single plastic strain is replaced by a plastic strain function, allowing smooth transitions between elastic and plastic behaviour is introduced. This monograph will benefit academic researchers in mechanics, civil engineering and geomechanics and practising geotechnical engineers; it will also interest numerical analysts in engineering mechanics.

Geotechnical Fundamentals for Addressing New World Challenges

Geotechnical Fundamentals for Addressing New World Challenges
Author: Ning Lu,James K. Mitchell
Publsiher: Springer
Total Pages: 357
Release: 2019-05-24
ISBN: 303006249X
Category: Science
Language: EN, FR, DE, ES & NL

Geotechnical Fundamentals for Addressing New World Challenges Book Excerpt:

This single-volume thoroughly summarizes advances in the past several decades and emerging challenges in fundamental research in geotechnical engineering. These fundamental research frontiers are critically reviewed and described in details in lights of four grand challenges our society faces: climate adaptation, urban sustainability, energy and material resources, and global water resources. The specific areas critically reviewed, carefully examined, and envisioned are: sensing and measurement, soil properties and their physics roots, multiscale and multiphysics processes in soil, geochemical processes for resilient and sustainable geosystems, biological processes in geotechnics, unsaturated soil mechanics, coupled flow processes in soil, thermal processes in geotechnical engineering, and rock mechanics in the 21st century.

Numerical Methods in Geomechanics

Numerical Methods in Geomechanics
Author: J.B. Martins
Publsiher: Springer Science & Business Media
Total Pages: 589
Release: 2012-12-06
ISBN: 9400978952
Category: Science
Language: EN, FR, DE, ES & NL

Numerical Methods in Geomechanics Book Excerpt:

Proceedings of the NATO Advanced Study Institute, Braga, Portugal, August 24-September 4, 1981

Rheological Fundamentals of Soil Mechanics

Rheological Fundamentals of Soil Mechanics
Author: S.S. Vyalov
Publsiher: Elsevier
Total Pages: 577
Release: 2013-10-22
ISBN: 0444600566
Category: Science
Language: EN, FR, DE, ES & NL

Rheological Fundamentals of Soil Mechanics Book Excerpt:

Soil rheology is a branch of soil mechanics investigating the origin of, and the time-dependent changes in the stressed and strained state of soil. The author of this book however interprets rheology as being the science concerned on the one hand with how the state of stress and strain is formed and altered in a body, and on the other, with the particulars of the body's behaviour failing to fit the traditional concepts of elasticity and plasticity. There are many instances where the actual behaviour of soil differs substantially from schematized concepts and by taking into account all the peculiarities of soil deformation, precise knowledge of soil properties can be obtained and analytical prediction thus improved. Such problems are tackled in this book. This book comprises three main parts. The first part deals with basic rheological concepts and terms, the physics of soil, principles of stress-strain theory, elasticity, plasticity and viscosity - all cardinal rheological properties. The second part explains the rheological processes taking place in soils, such as creep and long-term strength, which are examined by the author with allowance for nonlinear deformation. Along with the known phenomenological theories, attention is paid to the novel kinetic (physical) theory of deformations and long-term strength. The third part outlines the generalized theory of soil deformation. It explains why soil offers different resistances to tensional and compressional deformations and derives the generalized rheological equation of state, enabling the effect of the three stress tensor invariants on the changes in shape and volume to be taken into account. From the standpoint of the theory discussed, the penultimate chapter gives examples of solutions to some problems facing soil mechanics. The final chapter reviews mathematical models representing the actual behaviour of soil under load and provides numerical solutions for engineering problems obtained with the aid of computer models. Thus the book provides a wealth of information which will be of interest both to the practising geotechnical engineer as well as to teachers and students.

Constitutive Equations for Engineering Materials

Constitutive Equations for Engineering Materials
Author: Wai-Fah Chen,Atef F. Saleeb
Publsiher: Elsevier
Total Pages: 594
Release: 2013-10-22
ISBN: 1483101967
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Constitutive Equations for Engineering Materials Book Excerpt:

Constitutive Equations for Engineering Materials, Volume 1: Elasticity and Modeling, Revised Edition focuses on theories on elasticity and plasticity of engineering materials. The book first discusses vectors and tensors. Coordinate systems, vector algebra, scalar products, vector products, transformation of coordinates, indicial notation and summation convention, and triple products are then discussed. The text also ponders on analysis of stress and strain and presents numerical analysis. The book then discusses elastic stress-strain relations. Basic assumptions; need for elastic models; isotropic linear stress-strain relations; principle of virtual work; strain energy and complementary energy density in elastic solids; and incremental relations grounded on secant moduli are described. The text also explains linear elasticity and failure criteria for concrete and non-linear elasticity and hypoelastic models for concrete. The selection further tackles soil elasticity and failure criteria. Mechanical behavior of soils; failure criteria of soils; and incremental stress-strain models based on modification of the isotropic linear elastic formulation are considered. The text is a good source of data for readers interested in studying the elasticity and plasticity of engineering materials.

Foundations of Elastoplasticity Subloading Surface Model

Foundations of Elastoplasticity  Subloading Surface Model
Author: Koichi Hashiguchi
Publsiher: Springer
Total Pages: 796
Release: 2017-05-06
ISBN: 331948821X
Category: Science
Language: EN, FR, DE, ES & NL

Foundations of Elastoplasticity Subloading Surface Model Book Excerpt:

This book is the standard text book of elastoplasticity in which the elastoplasticity theory is comprehensively described from the conventional theory for the monotonic loading to the unconventional theory for the cyclic loading behavior. Explanations of vector-tensor analysis and continuum mechanics are provided first as a foundation for elastoplasticity theory, covering various strain and stress measures and their rates with their objectivities. Elastoplasticity has been highly developed by the creation and formulation of the subloading surface model which is the unified fundamental law for irreversible mechanical phenomena in solids. The assumption that the interior of the yield surface is an elastic domain is excluded in order to describe the plastic strain rate due to the rate of stress inside the yield surface in this model aiming at the prediction of cyclic loading behavior, although the yield surface enclosing the elastic domain is assumed in all the elastoplastic models other than the subloading surface model. Then, the plastic strain rate develops continuously as the stress approaches the yield surface, providing the advantages: 1) The tangent modulus changes continuously, 2) The yield judgment whether the stress reaches the yield surface is not required, 3) The stress is automatically attracted to the yield surface even when it goes out from the yield surface by large loading increments in numerical calculation and 4) The finite strain theory based on the multiplicative decomposition of deformation gradient tensor is formulated exactly. Consequently, the monotonic, the cyclic, the non-proportional loading behaviors for wide classes of materials including soils, rocks and concretes in addition to metals can be described rigorously by the subloading surface model. Further, the viscoplastic constitutive equations in a general rate from the quasi-static to the impact loadings are described, and constitutive equations of friction behavior and its application to the prediction of stick-slip phenomena, etc. are also described in detail. In addition, the return-mapping algorithm, the consistent tangent modulus, etc. are explained for the numerical analyses. Further, the damage, the phase-transformation and the crystal plasticity models are also described in brief. All of them are based on the subloading surface model. The elastoplasticity analysis will be advanced steadily based on the subloading surface model.

Computer Methods and Advances in Geomechanics

Computer Methods and Advances in Geomechanics
Author: D. Contractor,C.S. Desai,S. Harpalani,J. Kemeny,T. Kundu
Publsiher: CRC Press
Total Pages: 1904
Release: 2000-01-01
ISBN: 9789058091833
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Computer Methods and Advances in Geomechanics Book Excerpt:

Covering a wide range of topics involving both research developments and applications, resulting from the 10th International Conferecne on Computer Methods and Advances in Geomechanics (IACMAG) held in January 2001 in Tucson, Arizona, USA. The theme of the conference was Fundamentals through Applications. The up-to-date research results and applications in this 2-volume work (> 1900 pages) should serve as a valuable source of information for those engaged in research, analysis and design, practical application, and education in the fields of geomechanics and geotechnical engineering.

Foundation Engineering Handbook

Foundation Engineering Handbook
Author: Hsai-Yang Fang
Publsiher: Springer Science & Business Media
Total Pages: 923
Release: 2013-06-29
ISBN: 1475752717
Category: Science
Language: EN, FR, DE, ES & NL

Foundation Engineering Handbook Book Excerpt:

More than ten years have passed since the first edition was published. During that period there have been a substantial number of changes in geotechnical engineering, especially in the applications of foundation engineering. As the world population increases, more land is needed and many soil deposits previously deemed unsuitable for residential housing or other construction projects are now being used. Such areas include problematic soil regions, mining subsidence areas, and sanitary landfills. To overcome the problems associated with these natural or man-made soil deposits, new and improved methods of analysis, design, and implementation are needed in foundation construction. As society develops and living standards rise, tall buildings, transportation facilities, and industrial complexes are increasingly being built. Because of the heavy design loads and the complicated environments, the traditional design concepts, construction materials, methods, and equipment also need improvement. Further, recent energy and material shortages have caused additional burdens on the engineering profession and brought about the need to seek alternative or cost-saving methods for foundation design and construction.

Advanced Mathematical and Computational Geomechanics

Advanced Mathematical and Computational Geomechanics
Author: Dimitrios Kolymbas
Publsiher: Springer Science & Business Media
Total Pages: 315
Release: 2013-03-19
ISBN: 3540450793
Category: Science
Language: EN, FR, DE, ES & NL

Advanced Mathematical and Computational Geomechanics Book Excerpt:

Geomechanics is the mechanics of geomaterials, i.e. soils and rocks, and deals with fascinating problems such as settlements, stability of excavations, tunnels and offshore platforms, landslides, earthquakes and liquefaction. This edited book presents recent mathematical and computational tools and models to describe and simulate such problems in Geomechanics and Geotechnical Engineering. It includes a collection of contributions emanating from the three Euroconferences GeoMath ("Mathematical Methods in Geomechanics") that were held between 2000 and 2002 in Innsbruck/Austria and Horto/Greece.

Modern Trends in Geomechanics

Modern Trends in Geomechanics
Author: Wei Wu,Hai-Sui Yu
Publsiher: Springer Science & Business Media
Total Pages: 560
Release: 2006-11-22
ISBN: 3540357246
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Modern Trends in Geomechanics Book Excerpt:

This book is loaded with rich and stimulating articles by a roster of brilliant scholars, reflecting some recent trends in the frontier research of geomechanics. This collection of 32 contributions stems from an international workshop on "Modern Trends of Geomechanics" held in Vienna. The contributions span a wide range of topics and an enormous range of physical scales, from micromechanics at grain scale to engineering problems at large scale; from laboratory and field testing over constitutive modelling to numerical analysis. The key features of this book are: thermodynamics, multiphase continua and transport phenomena; constitutive modelling, localized bifurcation, micropolar theory, unsaturated soil, viscous and cyclic behaviour; numerical and analytical methods; discrete element method, micromechanics, grain crushing and damage; laboratory and field testing, foundation and mining engineering. This book will be rewarding for anyone interested in the frontier research in geomechanics and geotechnical engineering, appealing to graduate students, researchers and engineers alike.