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Modelisation Du Comportement Rheologique Dalliages A Letat Semi Solide
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Book Synopsis Modélisation du comportement rhéologique d'alliages à l'état semi-solide by : Trong Giang Nguyen
Download or read book Modélisation du comportement rhéologique d'alliages à l'état semi-solide written by Trong Giang Nguyen and published by . This book was released on 1991 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le travail présenté concerne la modélisation du comportement rhéologique d'alliages à l'état semi-solide, considérés comme des milieux poreux saturés de liquide. l'étude des déformations des mélanges solide-liquide est possible par l'introduction de paramètres internes supplémentaires caractérisant la porosité et en considérant le couplage entre la déformation de la matrice solide et l'écoulement du liquide interstitiel. La thermodynamique des processus irréversibles fournit alors un guide pour établir des lois de comportement, du type viscoplastique compressible. En se basant sur les conceptions de la mécanique des milieux continus et de la théorie des mélanges, un modèle thermo-mécanique du comportement rhéologique des alliages à l'état semi-solide a été construit, identifié et validé expérimentalement. L'étude expérimentale du comportement mécanique des matériaux semi-solides a été complétée par des essais sous contraintes triaxiales de révolution, qui permettent de mettre en évidence certaines caractéristiques comme l'écrouissage en densité, l'effet de la pression latérale sur le comportement du matériau et de déterminer l'évolution de la déformation volumique ainsi que des vitesses de déformation. Une autre méthode originale d'identification du modèle rhéologique, utilisant ces essais de compression triaxiale de révolution, a été présentée. De plus, l'influence de la morphologie de la phase solide sur le comportement mécanique d'un alliage à l'état semi-solide a été étudiée. Cet effet a été pris en compte par l'intégration dans la loi de fluage du matériau d'un paramètre stéréologique, défini comme le rapport entre la surface spécifique et la fraction volumique solide. Une loi d'évolution de ce paramètre en cours de déformation, dans le cas de la structure initialement globulaire, a été proposée.
Book Synopsis MODELISATION DU COMPORTEMENT RHEOLOGIQUE DE MACROMOLECULES SEMI-FLEXIBLES EN SOLUTION CONCENTREE by : Thierry Aubry
Download or read book MODELISATION DU COMPORTEMENT RHEOLOGIQUE DE MACROMOLECULES SEMI-FLEXIBLES EN SOLUTION CONCENTREE written by Thierry Aubry and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LA PLUPART DES CHAINES MACROMOLECULAIRES, SYNTHETIQUES OU NATURELLES, SONT SEMI-FLEXIBLES. LES MECANISMES DE SEMI-FLEXIBILITE ONT ETE PRIS EN COMPTE DANS DES THEORIES A L'EQUILIBRE. L'OBJET DE CETTE ETUDE EST DE CONTRIBUER A LA COMPREHENSION DU ROLE DE LA FLEXIBILITE DES CHAINES DANS LES PROPRIETES RHEOLOGIQUES NON LINEAIRES DE SYSTEMES POLYMERES CONCENTRES. LE MODELE RHEOLOGIQUE PROPOSE A ETE CONSTRUIT DANS UN CADRE THEORIQUE ASSURANT LA COMPATIBILITE AVEC LA THERMODYNAMIQUE A L'EQUILIBRE (THEORIE DES SYSTEMES HAMILTONIENS GENERALISES). LE SYSTEME PHYSIQUE MODELISE EST DECRIT EN UTILISANT DEUX VARIABLES D'ETAT: LE CHAMP DE VITESSE ET UNE VARIABLE D'ETAT CARACTERISANT LA MICROSTRUCTURE: LE TENSEUR DE CONFORMATION. L'ENERGIE LIBRE GOUVERNANT L'EVOLUTION DE CE SYSTEME PREND EN COMPTE LES CONTRIBUTIONS PHYSIQUES LIEES AUX MECANISMES DE SEMI-FLEXIBILITE, AUX INTERACTIONS DE VOLUME EXCLU ENTRE CHAINES, A L'INEXTENSIBILITE EN MOYENNE DES MACROMOLECULES. L'EQUATION D'EVOLUTION DU TENSEUR DE CONFORMATION EST RESOLUE EN UTILISANT UNE METHODE DE RUNGE-KUTTA. LES PREDICTIONS NUMERIQUES DU MODELE SONT PRESENTEES EN CISAILLEMENT ET EN ELONGATION SIMPLES PERMANENTS ET TRANSITOIRES POUR DIFFERENTES VALEURS DE FLEXIBILITE MACROMOLECULAIRE. ENFIN, LE MODELE EST CONFRONTE A L'EXPERIENCE SUR DES MESURES RHEOLOGIQUES MENEES EN CISAILLEMENT SIMPLE PERMANENT ET TRANSITOIRE AVEC DES SOLUTIONS CONCENTREES ISOTROPE D'HYDROXYPROPYLCELLULOSE DANS L'EAU
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Download or read book Properties of UO2 written by J. Belle and published by . This book was released on 1957 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :International Atomic Energy Agency Publisher :International Atomic Energy Agency ISBN 13 :9789201063205 Total Pages :72 pages Book Rating :4.0/5 (632 download)
Book Synopsis In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 by : International Atomic Energy Agency
Download or read book In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2020-08-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.
Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Book Synopsis Fatigue of Materials and Structures by : Claude Bathias
Download or read book Fatigue of Materials and Structures written by Claude Bathias and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of mechanical structures with improved and predictable durability cannot be achieved without a thorough understanding of the mechanisms of fatigue damage and more specifically the relationships between the microstructure of materials and their fatigue properties. Written by leading experts in the field, this book (which is complementary to Fatigue of Materials and Structures: Application to Damage and Design, also edited by Claude Bathias and André Pineau), provides an authoritative, comprehensive and unified treatment of the mechanics and micromechanisms of fatigue in metals, polymers and composites. Each chapter is devoted to one of the major classes of materials or to different types of fatigue damage, thereby providing overall coverage of the field. The book deals with crack initiation, crack growth, low-cycle fatigue, gigacycle fatigue, shorts cracks, fatigue micromechanisms and the local approach to fatigue damage, corrosion fatigue, environmental effects and variable amplitude loadings, and will be an important and much used reference for students, practicing engineers and researchers studying fracture and fatigue in numerous areas of mechanical, structural, civil, design, nuclear, and aerospace engineering as well as materials science.
Book Synopsis Multi-mechanism Modeling of Inelastic Material Behavior by : Georges Cailletaud
Download or read book Multi-mechanism Modeling of Inelastic Material Behavior written by Georges Cailletaud and published by John Wiley & Sons. This book was released on 2018-03-13 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on a particular class of models (namely Multi-Mechanism models) and their applications to extensive experimental data base related to different kind of materials. These models (i) are able to describe the main mechanical effects in plasticity, creep, creep/plasticity interaction, ratcheting extra-hardening under non-proportional loading (ii) provide local information (such us local stress/strain fields, damage, ….). A particular attention is paid to the identification process of material parameters. Moreover, finite element implementation of the Multi-Mechanism models is detailed.
Book Synopsis Non-Linear Mechanics of Materials by : Jacques Besson
Download or read book Non-Linear Mechanics of Materials written by Jacques Besson and published by Springer Science & Business Media. This book was released on 2009-11-25 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: In mechanical engineering and structural analysis there is a significant gap between the material models currently used by engineers for industry applications and those already available in research laboratories. This is especially apparent with the huge progress of computational possibilities and the corresponding dissemination of numerical tools in engineering practice, which essentially deliver linear solutions. Future improvements of design and life assessment methods necessarily involve non-linear solutions for inelastic responses, in plasticity or viscoplasticity, as well as damage and fracture analyses. The dissemination of knowledge can be improved by software developments, data base completion and generalization, but also by information and training. With such a perspective Non-Linear Mechanics of Materials proposes a knowledge actualization, in order to better understand and use recent material constitutive and damage modeling methods in the context of structural analysis or multiscale material microstructure computations.
Book Synopsis Nonlinear Optical Materials by : Jerome V. Moloney
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Book Synopsis Temperature-Fatigue Interaction by : L. Remy
Download or read book Temperature-Fatigue Interaction written by L. Remy and published by Elsevier. This book was released on 2002-03-11 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains a selection of peer-reviewed papers presented at the International Conference on Temperature-Fatigue Interaction, held in Paris, May 29-31, 2001, organised by the Fatigue Committee of the Societé Française de Métallurgie et de Matériaux (SF2M), under the auspices of the European Structural Integrity Society. The conference disseminated recent research results and promoting the interaction and collaboration amongst materials scientists, mechanical engineers and design engineers. Many engineering components and structures used in the automotive, aerospace, power generation and many other industries experience cyclic mechanical loads at high temperature or temperature transients causing thermally induced stresses. The increase of operating temperature and thermal mechanical loading trigger the interaction with time-dependent phenomena such as creep and environmental effects (oxidation, corrosion). A large number of metallic materials were investigated including aluminium alloys for the automotive industry, steels and cast iron for the automotive industry and materials forming, stainless steels for power plants, titanium, composites, intermetallic alloys and nickel base superalloys for aircraft industry, polymers. Important progress was observed in testing practice for high temperature behaviour, including environment and thermo-mechanical loading as well as in observation techniques. A large problem which was emphasized is to know precisely service loading cycles under non-isothermal conditions. This was considered critical for numerous thermal fatigue problems discussed in this conference.
Book Synopsis Advances in Mechanical Behaviour, Plasticity and Damage by : D. Miannay
Download or read book Advances in Mechanical Behaviour, Plasticity and Damage written by D. Miannay and published by Elsevier. This book was released on 2000-11-03 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its inception in 1991, EUROMAT has been held each year on behalf of the Federation of European Materials Societies (FEMS), and alternates between general and topical prospectives. This year's theme, Advances in Mechanical Behaviour, Plasticity and Damage, was proposed by the Societe Francaise de Metallurgie et de Materiaux (SF2M) to FEMS. This publication contains a selection of papers presented at the EUROMAT 2000 Conference, held in Tours, France on 7-9 November 2000. The aim of this Conference was to concentrate mainly on recent advances made in the investigation of the relationship between microstructures of materials and their mechanical behaviour; including, fundamentals, modelling and applications. Encompassed in the Conference's aim is the nurturing of the synergistic effect between the theoretical and applied areas in this field. This was achieved by addressing important basic and practical aspects of the mechanical behaviour and damage of materials whilst also providing significant links between various complementary approaches. All kinds of materials are covered and topics that were covered include the mechanics of solid polymers, microstructurs and micromechanisms, and the collective behavior of defects which looks at the interaction of multiple defects in a system.
Book Synopsis Numerical Methods in Contact Mechanics by : Vladislav A. Yastrebov
Download or read book Numerical Methods in Contact Mechanics written by Vladislav A. Yastrebov and published by John Wiley & Sons. This book was released on 2013-02-13 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational contact mechanics is a broad topic which brings together algorithmic, geometrical, optimization and numerical aspects for a robust, fast and accurate treatment of contact problems. This book covers all the basic ingredients of contact and computational contact mechanics: from efficient contact detection algorithms and classical optimization methods to new developments in contact kinematics and resolution schemes for both sequential and parallel computer architectures. The book is self-contained and intended for people working on the implementation and improvement of contact algorithms in a finite element software. Using a new tensor algebra, the authors introduce some original notions in contact kinematics and extend the classical formulation of contact elements. Some classical and new resolution methods for contact problems and associated ready-to-implement expressions are provided. Contents: 1. Introduction to Computational Contact. 2. Geometry in Contact Mechanics. 3. Contact Detection. 4. Formulation of Contact Problems. 5. Numerical Procedures. 6. Numerical Examples. About the Authors Vladislav A. Yastrebov is a postdoctoral-fellow in Computational Solid Mechanics at MINES ParisTech in France. His work in computational contact mechanics was recognized by the CSMA award and by the Prix Paul Caseau of the French Academy of Technology and Electricité de France.
Book Synopsis Trends in Computational Contact Mechanics by : Giorgio Zavarise
Download or read book Trends in Computational Contact Mechanics written by Giorgio Zavarise and published by Springer Science & Business Media. This book was released on 2011-06-19 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of Computational Contact Mechanics has many facets. Its main impact lies in the transfer of knowledge form theoretical research to applied sciences, and from there to industry. The application fields are literally countless, ranging from classical engineering to biomechanics and nano-sciences. The remarkable increase of computer power in recent years has been instrumental in enabling the development of simulation-based analysis in current design activity. This still involves tremendous effort in research, which focuses on, for example, multi-field and multi-scale problems, algorithmic robustness, and geometrical accuracy. Moreover, several aspects of Contact Mechanics, Debonding and Fracture Mechanics, have been combined to offer new enhanced possibilities to the computer simulation of complex phenomena. With these contributions of prominent scientists, this book offers a wide overview on the ongoing research at the highest level in the field.
Download or read book Superalloys 2016 written by Mark C. Hardy and published by Wiley-TMS. This book was released on 2016-10-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the Proceedings 13th International Symposium on Superalloys
Book Synopsis Forest Fire Research by : Universidade de Coimbra
Download or read book Forest Fire Research written by Universidade de Coimbra and published by . This book was released on 2010 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Mechanics in Reactor Technology by : F.H. Wittmann
Download or read book Structural Mechanics in Reactor Technology written by F.H. Wittmann and published by CRC Press. This book was released on 1987-01-01 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: .
