Download or read book On Linear Elastic Cross Anisotropic Rock written by Anastasia Blioumi and published by Logos Verlag Berlin GmbH. This book was released on 2014 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: English summary: Rocks composed of parallel layers are cross-anisotropic materials. This thesis describes a new approximate solution for the determination of the properties of these materials based on mold cavity expansion experiments. German description: Gesteine, die aus parallelen Schichten bestehen, sind quer-anisotrope Materialien. Die Disseration beschreibt eine neue Naherungslosung zur Bestimmung der Eigenschaften solcher Materialien, basierend auf Hohlraumaufweitungs- Versuchen. Daten aus Radialpressversuchen dienen der inversen Analyse des Problems. Wenn der innere Druck, der Radius des Hohlraums, die Orientierung der Schieferung und die Verschiebungen bekannt sind, ergibt die Naherungslosung Materialparameter-Kombinationen, die die gemessenen Verschiebungen gut abbilden. Die Losung ist jedoch nicht eindeutig. Dreidimensionale Finite Elemente Modellierung wird in dieser Arbeit verwendet, um Hohlraumaufweitung in linear-elastischem, quer-anisotropem Gestein zu simulieren. Eine numerische Untersuchung wird durchgefuhrt, um das Modell richtig zu etablieren (Randbediengungen, Grosse des Diskretisierungsbereichs usw.) und die moglichen Einflussgrossen (z. B. Genauigkeit der Bestimmung der Schieferungsorientierung) zu beurteilen. Die Ergebnisse der Feldmessungen werden dann mit den numerisch berechneten radialen Verschiebungen der Hohlraumwand verglichen. Letztere entstehen durch die Implementierung von Materialparametern, die aus der genannten Naherungslosung zuruckgerechnet werden. Ahnlichkeiten und Unterschiede werden beschrieben und erklart. Eine alternative Methode zur Ermittlung des Verhaltens von quer-anisotropen Materialien mittels kleinmassstablicher Hohlraumaufweitungs-Laborversuche in einem kunstlichen queranisotropen Material ist ebenfalls erwogen worden. Der Aufbau und die Prinzipien eines solchen Versuchs werden beschrieben und dessen Ausfuhrbarkeit wird untersucht.
Download or read book Rock Anisotropy and the Theory of Stress Measurements written by Bernard Amadei and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Any undisturbed rock mass is subject to natural stresses inclu ding gravitational stresses due to the mass of the overburden and possibly tectonic stresses due to the straining of the earth's crust and remanent stresses due to past tectonism. Knowledge of the in situ stress field must be integrated into any rock engineering design along with general rock mass characteristics such as de for mability, strength, permeability and time dependent behavior. For example, the choice of optimum orientation and shape of deep underground caverns or complex underground works will be controlled by the orientation and the magnitude of the in situ stress @ield if it is necessary to minimize stress concentration problems. Long term variation of the in situ stress field may also help to evaluate the potential hazard of earthquake occurences. The magnitude and orientation of the stress field ata point within a rock mass can be measured but there is no known method by which the state of stress at a point can be accurately determined by instruments located remotely. In general, measurements are made inside boreholes, on outcrops or on the internal surfaces of under ground cavities. Most of the measuring techniques intentionally disturb the state of stress in the rock and then measure consequent strains and displacements. Measured strains or displacements are then related to the stresses through assumptions of material behavior. A common procedure is to assume that the rock mass is linearly elastic, isotropic, continuous and homogeneous.
Download or read book Elastic Solutions for Soil and Rock Mechanics written by H. G. Poulos and published by John Wiley & Sons. This book was released on 1973 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Mechanics in Civil and Environmental Engineering written by Jian Zhao and published by CRC Press. This book was released on 2010-05-19 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last two decades rock mechanics in Europe has been undergoing some major transformation. The reduction of mining activities in Europe affects heavily on rock mechanics teaching and research at universities and institutes. At the same time, new emerging activities, notably, underground infrastructure construction, geothermal energy develo
Download or read book Mechanics of Crustal Rocks written by Yves M. Leroy and published by Springer Science & Business Media. This book was released on 2011-11-20 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: F.K. Lehner: A Review of the Linear Theory of Anisotropic Poroelastic Solids. - J.W. Rudnicki: Eshelby's Technique for Analyzing Inhomogeneities in Geomechanics. - Y. Gueguen, M. Kachanov: Effective Elastic Properties of Cracked and Porous Rocks - an Overview. - J.L. Raphanel: 3D Morphology Evolution of Solid-Fluid Interfaces by Pressure Solution. - Y.M. Leroy: An Introduction to the Finite-Element Method for Linear and Non-linear Static Problems. The mechanical behaviour of the earth's upper crust enters into a great variety of questions in different areas of the geological and geophysical sciences as well as in the more applied geotechnical disciplines. This volume presents a selection of papers from a CISM course in Udine on this topic. While each of these chapters will make for a useful contribution in its own right, the present bundle also illustrates, by way of examples, the variety of theoretical concepts and tools that are currently brought to bear on earth deformation studies, ranging from reviews of poroelastic field theory to micro-mechanical and homogenization studies, chemomechanics and interfacial stability theory of soluble solids under stress, and finally to an introduction to the finite element method.
Download or read book A Primer on Theoretical Soil Mechanics written by Dimitrios Kolymbas and published by Cambridge University Press. This book was released on 2022-08-04 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: An in-depth, comprehensible approach to theoretical soil mechanics and an introduction to the new theory of barodesy.
Download or read book Advances in Energy Environment and Materials Science written by Yeping Wang and published by CRC Press. This book was released on 2016-11-30 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2016 International Conference on Energy, Environment and Materials Science (EEMS 2016) took place on July 29-31, 2016 in Singapore. EEMS 2016 has been a meeting place for innovative academics and industrial experts in the field of energy and environment research. The primary goal of the conference is to promote research and developmental activities in energy and environment research and further to promote scientific information exchange between researchers, developers, engineers, students, and practitioners working all around the world. The conference will be organized every year making it an ideal platform for people to share views and experiences in energy, environment and materials science and related areas.
Download or read book Rock Mechanics Based on an Anisotropic Jointed Rock Model AJRM written by Walter Wittke and published by John Wiley & Sons. This book was released on 2014-04-07 with total page 865 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dieses Buch konzentriert sich auf die Grundlagen der Felsmechanik als Basis für den sicheren und wirtschaftlichen Entwurf und Bau von Tunneln, Dämmen und Böschungen in geklüftetem und anisotropem Fels. Es ist in vier Hauptteile gegliedert: Grundlagen und Modelle Berechnungs- und Entwurfsmethoden Erkundungen, Versuche, Messung und Beobachtung Anwendungen und Fallbeispiele. Die felsmechanischen Modelle berücksichtigen den Einfluss von Trennflächen auf das Spannungs-Dehnungs-Verhalten und die Durchlässigkeit von geklüftetem Fels. Dieses Buch ist für: Bau- und Bergbauingenieure Geologen Studenten aus den entsprechenden Bereichen
Download or read book Applications and developments of Barodesy written by Fabian Schranz and published by Logos Verlag Berlin GmbH. This book was released on 2019-04-01 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Barodesy is a constitutive model for granular materials such as sand and clay. It is based on the asymptotic behaviour of granular media at a constant deformation rate. In this work the existing sand version of Barodesy is improved. For this purpose, the underlying scalar equations are simplified using different concepts from soil mechanics. The improved version is also compared with laboratory tests and different elastoplastic and hypoplastic constitutive relations. Also the stability of slopes and advanced stress paths such as the rotation of the princple stresses are investigated with these models.
Download or read book Development of Soft Particle Code SPARC written by Chien-Hsun Chen and published by Logos Verlag Berlin GmbH. This book was released on 2015-08-31 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work aims at developing a numerical simulation method, Soft PARticle Code (SPARC). The term textit soft emphasizes that no boundaries between particles are defined and every particle possesses a support consisting of a set of adjacent particles. The polynomial interpolation/approximation method is utilized for the evaluation of spatial derivatives using the information carried by particles in supports. The system of equations consisting of spatial derivatives is solved using an iterative nonlinear solver and the computation of the Jacobian matrix is parallelized. The simulations of laboratory tests have been carried out to show the applications and limitations of the current version of SPARC. In addition to the simulations, laboratory (zig-zag) model tests using fine sand were carried out, in which the cyclic tilt of a retaining wall induces a peculiar motion in the backfill (sand), with closed trajectories (eddies).
Download or read book Barodesy and its Application for Clay written by Gertraud Medicus and published by Logos Verlag Berlin GmbH. This book was released on 2015-08-28 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Barodesy is a constitutive model for granular materials. It is based on proportional strain and stress paths and the asymptotic behaviour of soil. In this work, an existing relation for proportional strain paths and proportional stress paths is further developed. A modification of barodesy to model clay behaviour is introduced. Common concepts of soil mechanics, such as critical states, barotropy and pyknotropy are comprised.
Download or read book The Rock Physics Handbook written by Gary Mavko and published by Cambridge University Press. This book was released on 2020-01-09 with total page 741 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brings together widely scattered theoretical and laboratory rock physics relations critical for modelling and interpretation of geophysical data.
Download or read book Petroleum Related Rock Mechanics written by Erling Fjær and published by Elsevier. This book was released on 2008-01-04 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineers and geologists in the petroleum industry will find Petroleum Related Rock Mechanics, 2e, a powerful resource in providing a basis of rock mechanical knowledge - a knowledge which can greatly assist in the understanding of field behavior, design of test programs and the design of field operations. Not only does this text give an introduction to applications of rock mechanics within the petroleum industry, it has a strong focus on basics, drilling, production and reservoir engineering. Assessment of rock mechanical parameters is covered in depth, as is acoustic wave propagation in rocks, with possible link to 4D seismics as well as log interpretation. Learn the basic principles behind rock mechanics from leading academic and industry experts Quick reference and guide for engineers and geologists working in the field Keep informed and up to date on all the latest methods and fundamental concepts
Download or read book Progress in Civil Architectural and Hydraulic Engineering IV written by Yun-Hae Kim and published by CRC Press. This book was released on 2018-11-22 with total page 1447 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Civil, Architectural and Hydraulic Engineering series provides a forum for exchange of ideas and enhancing mutual understanding between scientists, engineers, policymakers and experts in these engineering fields. This book contains peer-reviewed contributions from many experts representing industry and academic es
Download or read book Analysis and Design Methods written by Catherine Fairhurst and published by Elsevier. This book was released on 2014-06-28 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis and Design Methods
Download or read book Introduction to Finite Element Vibration Analysis written by Maurice Petyt and published by Cambridge University Press. This book was released on 1998-07-30 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: First time paperback of successful mechanical engineering book suitable as a textbook for graduate students in mechanical engineering.
Download or read book The Rock Physics Handbook written by Gary Mavko and published by Cambridge University Press. This book was released on 2009-04-30 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: A significantly expanded new edition of this practical guide to rock physics and geophysical interpretation for reservoir geophysicists and engineers.
