LE PRESENT TRAVAIL PROPOSE UN MODELE THERMOMECANIQUE TRIDIMENSIONNEL DE LA PHASE DE REFROIDISSEMENT EN FONDERIE, AINSI QUE SON TRAITEMENT NUMERIQUE PAR LA METHODE DES ELEMENTS FINIS. L'EXAMEN PRELIMINAIRE DES PHENOMENES PHYSIQUES MIS EN JEU DANS LE PROCEDE PERMET DE DEGAGER QUELQUES HYPOTHESES IMPORTANTES: REMPLISSAGE INSTANTANE, MOULE RIGIDE, PETITES TRANSFORMATIONS. LE TRAITEMENT NUMERIQUE DES TRANSFERTS THERMIQUES EST ENSUITE EXPOSE ; L'ACCENT EST MIS SUR DEUX PARTICULARITES ALGORITHMIQUES: LA PRISE EN COMPTE DU CHANGEMENT DE PHASE AINSI QUE LA RESOLUTION ALTERNEE MULTI-DOMAINE SUR DES MAILLAGES NON-COINCIDENTS. L'INTERACTION ENTRE PHENOMENES THERMIQUES ET MECANIQUES EST REALISEE PAR UNE ACTUALISATION INCREMENTALE. UN FACTEUR ESSENTIEL DE L'INTERACTION EST LE DECOLLEMENT DU AU RETRAIT ENTRE LA PIECE ET LE MOULE, ANALYSE PAR UN ALGORITHME DE CONTACT NODAL SPECIFIQUE. LE COEFFICIENT D'ECHANGE THERMIQUE ENTRE LES DEUX SOLIDES EST FONCTION DE L'AMPLITUDE DU RETRAIT A L'INTERFACE. LE COMPORTEMENT DU METAL DE L'ETAT LIQUIDE A L'ETAT SOLIDE EST DECRIT PAR UNE LOI ELASTOVISCOPLASTIQUE UNIQUE (LA LOI DE PERZYNA) POUR LAQUELLE NOUS AVONS DEVELOPPE UNE PROCEDURE DE RESOLUTION ORIGINALE. QUELQUES APPLICATIONS COMPLETENT L'EXPOSE: FORMATION D'UNE LAME D'AIR PAR RETRAIT AXIAL, PUIS RADIAL ; MOULAGE D'UNE ROUE EN FONTE ; MOULAGE D'UN CYLINDRE DE SUSPENSION. L'INTERET DU MODELE TIENT AU FAIT QU'IL OPERE SUR LES CARACTERISTIQUES PHYSIQUES ET MECANIQUES DES ALLIAGES PLUTOT QUE SUR DES REGLES DE L'ART SPECIFIQUES: L'UTILISATION DE LOIS PHYSIQUES PERMET AINSI D'ASSURER LE CARACTERE PREDICTIF DU MODELE EN TOUTE GENERALITE

This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.

The principal aim of this text is to encourage the development and application of numerical modelling techniques as an aid to achieving greater efficiency and optimization of metal-forming processes. The contents of this book have therefore been carefully planned to provide both an introduction to the fundamental theory of material deformation simulation, and also a comprehensive survey of the "state-of-the-art" of deformation modelling techniques and their application to specific and industrially relevant processes. To this end, leading international figures in the field of material deformation research have been invited to contribute chapters on subjects on which they are acknowledged experts. The information in this book has been arranged in four parts: Part I deals with plasticity theory, Part II with various numerical modelling techniques, Part III with specific process applications and material phenomena and Part IV with integrated computer systems. The objective of Part I is to establish the underlying theory of material deformation on which the following chapters can build. It begins with a chapter which reviews the basic theories of classical plasticity and describes their analytical representations. The second chapter moves on to look at the theory of deforming materials and shows how these expressions may be used in numerical techniques. The last two chapters of Part I provide a review of isotropic plasticity and anisotropic plasticity.

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.

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.

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.