Download or read book Mechanics of Poroelastic Geologic Media Susceptible to Damage written by Ali Shirazi and published by . This book was released on 2004 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The computational procedure that accounts for damage-induced evolution of stiffness and hydraulic properties and stress state dependency in damage evolution are used to model practical problems of interest in geomechanics, applied mechanics and civil engineering. The fluid pressure development within a spheroidal fluid inclusion surrounded by a damage-susceptible poroelastic medium has been examined through the computational procedure. The computational procedure has also been used to study time-dependent translational displacements of a rock socket embedded in a damage susceptible soft rock and the procedure has been also applied to examine the time-dependent in-plane displacements of a flat elliptical rigid anchorage. The computational results indicate that the consolidation behaviour of the brittle poroelastic media can be significantly influenced through consideration of the damage-induced alterations in both the elastic stiffness and the hydraulic conductivity, the latter property exerting a greater influence. The dependency of the evolution of damage to the state of stresses can also influence the consolidation of a poroelastic medium." --
Download or read book Numerical Models in Geomechanics written by G.N. Pande and published by CRC Press. This book was released on 2004-08-15 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting the current research and advances made in the application of numerical methods in geotechnical engineering, this volume details proceedings of the Ninth International Symposium on 'Numerical Models in Geomechanics - NUMOG IX' held in Ottawa, Canada, 25-27 August 2004. Highlighting a number of new developments in the area, papers concentrate upon the following four main areas: * constitutive relations for geomaterials * numerical algorithms: formulation and performance * modelling of transient, coupled and dynamic problems * application of numerical techniques to practical problems. Representing the most advanced, modern findings in the field, Numerical Models in Geomechanics is a comprehensive and impeccably-researched text, ideal for students and researchers as well as practising engineers.
Download or read book Thermo Poroelasticity and Geomechanics written by A. P. S. Selvadurai and published by Cambridge University Press. This book was released on 2016-10-27 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: A full account of thermo-poroelasticity and thermo-poromechanics with derivations to problems, for both experienced and novice researchers.
Download or read book Theory of Linear Poroelasticity with Applications to Geomechanics and Hydrogeology written by Herbert F. Wang and published by Princeton University Press. This book was released on 2017-02-15 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theory of linear poroelasticity describes the interaction between mechanical effects and adding or removing fluid from rock. It is critical to the study of such geological phenomena as earthquakes and landslides and is important for numerous engineering projects, including dams, groundwater withdrawal, and petroleum extraction. Now an advanced text synthesizes in one place, with one notation, numerous classical solutions and applications of this highly useful theory. The introductory chapter recounts parallel developments in geomechanics, hydrogeology, and reservoir engineering that are unified by the tenets of poroelasticity. Next, the theory's constitutive and governing equations and their associated material parameters are described. These equations are then specialized for different simplifying geometries: unbounded problem domains, uniaxial strain, plane strain, radial symmetry, and axisymmetry. Example problems from geomechanics, hydrogeology, and petroleum engineering are incorporated throughout to illustrate poroelastic behavior and solution methods for a wide variety of real-world scenarios. The final chapter provides outlines for finite-element and boundary-element formulations of the field's governing equations. Whether read as a course of study or consulted as a reference by researchers and professionals, this volume's user-friendly presentation makes accessible one of geophysics' most important subjects and will do much to reduce poroelasticity's reputation as difficult to master.
Download or read book Frattura ed Integrit Strutturale Annals 2014 written by Luca Susmel and published by Gruppo Italiano Frattura. This book was released on 2014-09-12 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Mechanics and Engineering Volume 1 written by Xia-Ting Feng and published by CRC Press. This book was released on 2017-03-16 with total page 749 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles is the first volume of the five-volume set Rock Mechanics and Engineering and contains twenty-four chapters from key experts in the following fields: - Discontinuities; - Anisotropy; - Rock Stress; - Geophysics; - Strength Criteria; - Modeling Rock Deformation and Failure. The five-volume set “Comprehensive Rock Engineering”, which was published in 1993, has had an important influence on the development of rock mechanics and rock engineering. Significant and extensive advances and achievements in these fields over the last 20 years now justify the publishing of a comparable, new compilation. Rock Mechanics and Engineering represents a highly prestigious, multi-volume work edited by Professor Xia-Ting Feng, with the editorial advice of Professor John A. Hudson. This new compilation offers an extremely wideranging and comprehensive overview of the state-of-the-art in rock mechanics and rock engineering and is composed of peer-reviewed, dedicated contributions by all the key experts worldwide. Key features of this set are that it provides a systematic, global summary of new developments in rock mechanics and rock engineering practices as well as looking ahead to future developments in the fields. Contributors are worldrenowned experts in the fields of rock mechanics and rock engineering, though younger, talented researchers have also been included. The individual volumes cover an extremely wide array of topics grouped under five overarching themes: Principles (Vol. 1), Laboratory and Field Testing (Vol. 2), Analysis, Modelling and Design (Vol. 3), Excavation, Support and Monitoring (Vol. 4) and Surface and Underground Projects (Vol. 5). This multi-volume work sets a new standard for rock mechanics and engineering compendia and will be the go-to resource for all engineering professionals and academics involved in rock mechanics and engineering for years to come.
Download or read book Analytical Methods in Petroleum Upstream Applications written by Cesar Ovalles and published by CRC Press. This book was released on 2015-04-02 with total page 2054 pages. Available in PDF, EPUB and Kindle. 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.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crustal Permeability written by Tom Gleeson and published by John Wiley & Sons. This book was released on 2016-11-30 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: Permeability is the primary control on fluid flow in the Earth’s crust and is key to a surprisingly wide range of geological processes, because it controls the advection of heat and solutes and the generation of anomalous pore pressures. The practical importance of permeability – and the potential for large, dynamic changes in permeability – is highlighted by ongoing issues associated with hydraulic fracturing for hydrocarbon production (“fracking”), enhanced geothermal systems, and geologic carbon sequestration. Although there are thousands of research papers on crustal permeability, this is the first book-length treatment. This book bridges the historical dichotomy between the hydrogeologic perspective of permeability as a static material property and the perspective of other Earth scientists who have long recognized permeability as a dynamic parameter that changes in response to tectonism, fluid production, and geochemical reactions.
Download or read book Computational Modelling of Fracture and Damage in Poroelastic Media written by Abbas Ali Tofangchi Mahyari and published by . This book was released on 1997 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: "As the applications of the theory of poroelasticity diversify, attention needs to be focused on other aspects of importance. The class of transient and steady crack extension in poroelastic media is recognized as an area of interest in geomechanics applications and in energy resources recovery from geological formations. A computational algorithm is developed to examine the transient quasi-static crack extension in poroelastic media where the temporal and spatial variations of boundary conditions governing the displacement, traction and pore pressure fields are taken into account in the incremental analysis. The path of crack extension is established by a mixed-mode crack extension criterion applicable to the porous fabric. The computational modelling of steady state crack extension in poroelastic media at constant velocity is also examined for the plane strain problems. The finite element formulations of the governing equations, which are velocity-dependent, are developed by employing the Galerkin technique. The poroelastic behaviour of material depends on the propagation velocity at the crack tip. The computational schemes developed in this study followed an extensive procedure of verification via known analytical solutions to poroelasticity problems and for limiting cases of initial undrained (t → 0+) and final drained (t → +infinity) elastic responses recovered through analogous problems in classical elasticity." --
Download or read book Contact and Crack Problems in Poroelastic Media written by Seyed Parham Samea and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis investigates the class of problems that are of interest to geomechanics, earth sciences and resource geomechanics within the frameworks of Biot’s poroelasticity. This study aims to provide analytical solutions that can be used as benchmarks to validate computational approaches for examining problems pertaining to consolidation, crack nucleation and extension in poroelastic media. The problems considered in this thesis are restricted to plausible axisymmetric ones that are mathematically well-posed and analytically manageable. The formulation of these mixed boundary value problems uses the stress function approach applicable to semi-infinite domains. Laplace and Hankel integral transforms are used to reduce the mixed boundary value problems to sets of coupled Fredholm integral equations of the second-kind. These integral equations are solved using numerical approaches in order to examine the transient behavior of the fluid-saturated medium.The first problem examined in this thesis re-examines the indentation of a halfspace region with poroelastic properties by considering the displacement boundary conditions that are consistent with adhesive contact. The pore fluid pressure boundary conditions employ either: (i) completely pervious conditions, (ii) completely impervious boundary conditions or (iii) impervious boundary conditions within the contact zone and free drainage conditions exterior to the contact zone. The analytical estimates for the axial displacement of the rigid indenter are used to develop numerical results for the Degree of Consolidation of the rigid indenter, which indicates the relative consolidation settlement of the indenter over time. The accuracy of the numerical schemes used in the solution of these poroelastic contact problems is also discussed.The thesis then examines the problem of the indentationmof a poroelastic halfspace that is reinforced with an inextensible permeable/impermeable membrane located at a finite depth. The developments address (i) frictionless/adhesive constraints at the contact between the poroelastic halfspace and the rigid indenter, (ii) the pore fluid pressure boundary conditions at the base of the indenter, and (iii) pore fluid pressure boundary conditions at the plane of the inextensible membrane. The boundary condition (iii) is indicative of geosynthetic reinforcing elements that provide only tensile resistance or provide a combined reinforcement and barrier/drainage arrangement by imposing impervious/zero-pore fluid pressure boundary conditions at the reinforcement level. The analytical estimates for the time-dependent displacements of the rigid indenter are compared with results obtained using a finite element approach. It is recognized that the inextensibility constraint is a highly idealized approximation to reinforcing elements that have finite flexibility; nonetheless it provides a useful benchmark problem for examining the validity of computational approaches for reinforced geomaterials.This thesis also considers certain canonical problems that can be of assistance to the calibration of computational approaches in modelling the mechanics of stable fractures in poroelastic media. The study first examines the problem of fluid injection over a circular area within a poroelastic halfspace domain that would create the skeletal stress state necessary to initiate fracture. The triggering of the fracture is assumed to create an axisymmetric penny-shaped crack whose surfaces will be subjected to fluid pressure. The mechanics of the penny-shaped crack in terms of its potential to extend in an axisymmetric fashion is examined. The analysis of the poroelasticity problem of fluid-injection into the crack gives rise to time-dependent skeletal stress intensity factors (SIFs) at the crack tip; these are combined with a mixed-mode brittle skeletal fracture criterion to establish the injection pressures"--
Download or read book Introduction to continuum damage mechanics written by L. Kachanov and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern engineering materials subjected to unfavorable mechanical and environmental conditions decrease in strength due to the accumulation of microstructural changes. For example, considering damage in metals we can mention creep damage, ductile plastic damage, embrittlement of steels and fatigue damage. To properly estimate the value of damage when designing reliable structures it is necessary to formulate the damage phenomenon in terms of mechanics. Then it is possible to analyse various engineering problems using analytical and computational techniques. During the last two decades the basic principles of continuum damage mechanics were formulated and some special problems were solved. Many scientific papers were published and several conferences on damage mechanics took place. Now continuum damage mechanics is rapidly developing branch of fracture mechanics. This book is probably the first one on the subject; it contains a sys tematic description of the basic aspects of damage mechanics and some of its applications. In general, a theoretical description of damage can be rather compli cated. The experiments in this field are difficult (especially under multiax ial stress and non-proportional loading). Therefore, experimental data, as a rule, are scarce. Determination of functions and constants, which play a role in the complex variants of the theory, from available experimental data is often practically impossible. ix L.M. Kachanov The problems of damage mechanics are mainly engineering ones. Therefore, the author tries to avoid superfluous mathematical formalism. Some more details of the book's subject can be found in the list of con tents.
Download or read book Hardrock Tunnel Boring Machines written by Bernhard Maidl and published by John Wiley & Sons. This book was released on 2012-01-09 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the fundamentals of tunneling machine technology: drilling, tunneling, waste removal and securing. It treats methods of rock classification for the machinery concerned as well as legal issues, using numerous example projects to reflect the state of technology, as well as problematic cases and solutions. The work is structured such that readers are led from the basics via the main functional elements of tunneling machinery to the different types of machine, together with their areas of application and equipment. The result is an overview of current developments. Close cooperation among the authors involved has created a book of equal interest to experienced tunnelers and newcomers.
Download or read book Theory of Porous Media written by Reint de Boer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a consistent treatment of the material-independent fundamental equations of the theory of porous media, formulating constitutive equations for frictional materials in the elastic and plastic range, while tracing the historical development of the theory. Thus, for the first time, a unique treatment of fluid-saturated porous solids is presented, including an explanation of the corresponding theory by way of its historical progression, and a thorough description of its current state.
Download or read book Mechanics of Materials and Interfaces written by Chandrakant S. Desai and published by CRC Press. This book was released on 2000-12-20 with total page 711 pages. Available in PDF, EPUB and Kindle. Book excerpt: The disturbed state concept (DSC) is a unified, constitutive modelling approach for engineering materials that allows for elastic, plastic, and creep strains, microcracking and fracturing, stiffening or healing, all within a single, hierarchical framework. Its capabilities go well beyond other available material models yet lead to significant simpl
Download or read book Mechanics of Poroelastic Media written by A.P.S. Selvadurai and published by Springer Science & Business Media. This book was released on 1996-01-31 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Mechanics of Poroelastic Media the classical theory of poroelasticity developed by Biot is developed and extended to the study of problems in geomechanics, biomechanics, environmental mechanics and materials science. The contributions are grouped into sections covering constitutive modelling, analytical aspects, numerical modelling, and applications to problems. The applications of the classical theory of poroelasticity to a wider class of problems will be of particular interest. The text is a standard reference for researchers interested in developing mathematical models of poroelasticity in geoenvironmental mechanics, and in the application of advanced theories of poroelastic biomaterials to the mechanics of biomaterials.
Download or read book Energy Geotechnics written by Frank Wuttke and published by CRC Press. This book was released on 2016-12-01 with total page 743 pages. Available in PDF, EPUB and Kindle. Book excerpt: Energy Geotechnics includes 97 technical papers presented at the 1st International Conference on Energy Geotechnics (ICEGT 2016, Kiel, Germany, 29-31 August 2016). The contributions provides significant advances and critical challenges facing the areas of fundamentals, constitutive and numerical modelling, testing techniques and energy geotechnics applications. Energy Geotechnics contains seven regular sessions and six minisymposia, with contributions on discrete and continuum based modelling as well as investigations based on experimental studies at various scales. The papers on discrete and continuum based modelling examine the behaviour of gas hydrate sediments, cyclic and Themo-Hydro-Mechanical (T-H-M) modelling of energy piles, non-linear behaviour of energy geo-storage and geo-structures, deformation of geomaterials, modelling of borehole heat exchangers and energy walls, analysis of hydraulic fracturing and discontinuities in reservoirs, engineering problems involving gas hydrates sediments, and modelling of environmental impact of energy geotechnical processes.
