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Conception Optimisee De Structures Constituees De Materiaux Composites Thermoplastiques A Fibres Continues
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Book Synopsis Conception optimisée de structures constituées de matériaux composites thermoplastiques à fibres continues by : Arnaud Gillet
Download or read book Conception optimisée de structures constituées de matériaux composites thermoplastiques à fibres continues written by Arnaud Gillet and published by . This book was released on 2007 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les matériaux composites à matrice thermoplastique et fibre continue (TPFC) connaissent depuis quelques années un essor important. Les raisons de cette évolution tiennent aux besoins d'optimisation de certaines industries comme l'automobile ou l'aéronautique. Paradoxalement, peu d'études leur sont consacrées. La quasi totalité des essais et des études scientifiques publiées sur les TPFC ont été réalisés sur des composites AS4/PEEK, un matériau d'excellence, reconnu pour ses performances mécaniques proches des composites carbone-époxy classiques. Dans un premier temps, un ensemble de publications est exploité pour mettre en évidence les principales caractéristiques du comportement mécanique de TPFC unidirectionnels (UD). Suite à cette étude, nous proposons un modèle multi-échelle qui reproduit convenablement la réponse d'un stratifié tout en limitant l'effort expérimental et numérique. Cette étude a permis de simuler fidèlement un ensemble d'essais tirés de la littérature et ainsi conforter les hypothèses faites. Une seconde étape du travail de cette thèse concerne l'optimisation de structures composites. La riche bibliographie sur cette thématique nous a permis de cerner les principales exigences industrielles, et de choisir un algorithme génétique, adapté à la spécificité des problèmes traités. Des problèmes simples sont exploités pour comparer les mérites respectifs de divers choix algorithmiques et pour évaluer l'influence des paramètres mécaniques sur les solutions optimales. Enfin, des analyses structurelles sont menées par la méthode des éléments finis intégrant des contraintes technologiques. Ce travail met en évidence l'importance des choix méthodologiques sur la qualité de la solution finale. Les méthodes proposées permettent d'obtenir des solutions quasi-optimales performantes tout en limitant la durée des procédures grâce à une évaluation comparative rigoureuse qui justifie les hypothèses retenues.
Book Synopsis CONTRIBUTION A LA CONCEPTION OPTIMISEE DES STRUCTURES EN MATERIAUX COMPOSITES STRATIFIES by : HAMID.. SABZEVARI
Download or read book CONTRIBUTION A LA CONCEPTION OPTIMISEE DES STRUCTURES EN MATERIAUX COMPOSITES STRATIFIES written by HAMID.. SABZEVARI and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS CETTE ETUDE, SONT PROPOSEES DEUX METHODOLOGIES GENERALES D'OPTIMISATION DES STRUCTURES EN MATERIAUX COMPOSITES STRATIFIES (METHODOLOGIE D'OPTIMISATION MULTI-NIVEAUX ET METHODOLOGIE D'OPTIMISATION APPROCHEE) QUI PRENNENT EN COMPTE, COMME VARIABLES D'OPTIMISATION, L'ORIENTATION DES FIBRES ET L'EPAISSEUR DES COUCHES. DANS LA METHODOLOGIE D'OPTIMISATION MULTI-NIVEAUX ON DEFINIT LE NIVEAU DES SOUS-STRUCTURES ET CELUI DE LA STRUCTURE COMPLETE. ON MINIMISE LA MASSE EN FONCTION DE L'EPAISSEUR DE CHAQUE COUCHE. LES CONTRAINTES D'OPTIMISATION PORTENT SUR L'ORIENTATION DES FIBRES ET L'EPAISSEUR DE CHAQUE COUCHE (LE CRITERE DE CONVERGENCE GLOBALE EST CONTROLE: S'IL N'EST PAS SATISFAIT, ON EFFECTUE UNE OPTIMISATION DE LA STRUCTURE ENTIERE EN PRENANT POUR SEULE VARIABLE D'OPTIMISATION L'EPAISSEUR DES COUCHES DE CHAQUE SOUS-STRUCTURE). LA METHODOLOGIE D'OPTIMISATION APPROCHEE EVITE L'OPTIMISATION AU NIVEAU DE LA STRUCTURE ENTIERE. ELLE EST BASEE SUR UN CRITERE D'OPTIMALITE OU TOUTES LES SOUS-STRUCTURES ATTEIGNENT SIMULTANEMENT LA RUPTURE POUR AU MINIMUM UN CAS DE CHARGE. LA MOYENNE DES EFFORTS ET DES MOMENTS RESULTANTS EST CALCULEE ET PERMET D'OPTIMISER LES SOUS-STRUCTURES A L'ITERATION SUIVANTE. CES DEUX METHODOLOGIES SONT APPLIQUEES A DIFFERENTES STRUCTURES EN MATERIAUX COMPOSITES STRATIFIES. ON MONTRE QUE LA CONVERGENCE GLOBALE EST ATTEINTE. LES STRUCTURES OPTIMALES, QUOIQUE SORTANT DES HABITUDES INDUSTRIELLES ACTUELLES, SONT REALISABLES. LA COMPARAISON DE DIFFERENTS CRITERES DE RUPTURE PERMET DE RETENIR LE CRITERE DE TSAI-WU. LA METHODE DE LA PROGRAMMATION LINEAIRE RECURSIVE AVEC LIMITES MOBILES EST PREFEREE A UNE METHODE DE FONCTION DE PENALITE CAR ELLE DONNE DES RESULTATS PLUS RAPIDES ET NECESSITE MOINS DE CALCUL STRUCTURAL A CHAQUE ITERATION. UNE VERIFICATION EXPERIMENTALE DES TRAVAUX ENUMERES CI-DESSUS A ETE EFFECTUEE METTANT EN VALEUR UNE CORRESPONDANCE CORRECTE ENTRE LES RESULTATS EXPERIMENT
Book Synopsis Analyse et conception des structures en materiaux composites: Materiaux composites a fibres longues et matrice polymere by :
Download or read book Analyse et conception des structures en materiaux composites: Materiaux composites a fibres longues et matrice polymere written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Matériaux composites à matrice organique by : Pierre-Etienne Bourban
Download or read book Matériaux composites à matrice organique written by Pierre-Etienne Bourban and published by EPFL Press. This book was released on 2004-01-01 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adhesion between polymers and concrete / Adhésion entre polymères et béton by : H. R. Sasse
Download or read book Adhesion between polymers and concrete / Adhésion entre polymères et béton written by H. R. Sasse and published by Springer. This book was released on 2013-11-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.
Author :North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development Publisher : ISBN 13 :9789283600046 Total Pages : pages Book Rating :4.6/5 ( download)
Book Synopsis AGARD Conference Proceedings by : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development
Download or read book AGARD Conference Proceedings written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Poly(lactic acid) Science and Technology by : Alfonso Jiménez
Download or read book Poly(lactic acid) Science and Technology written by Alfonso Jiménez and published by Royal Society of Chemistry. This book was released on 2015 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of the synthesis, characterisation, properties and applications of poly(lactic acid) science and technology covering scientific, ecological, social and economic issues.
Book Synopsis Structural Conservation of Stone Masonry by :
Download or read book Structural Conservation of Stone Masonry written by and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemistry of Lignocellulosics by : Taylor & Francis Group
Download or read book Chemistry of Lignocellulosics written by Taylor & Francis Group and published by CRC Press. This book was released on 2021-03-31 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the chemical properties of lignocellulosic fibers, knowledge of which is essential for innovation and sustainable development of their transformation. Thermochemical transformation of wood and other lignocellulosics is presented to highlight its volatile, liquid and solid products and their novel applications. Forest biorefinery is described to emphasize the new products from lignocellulosic constituents, both structural (cellulose, hemicelluloses and lignins) and those extraneous to cell walls-extractives. New developments in cellulose technology related to nanocellulose are discussed in relation to new applications. Industrial lignins are presented in detail, both in terms of extraction procedures from spent liquors and structural characterization of the isolated lignins. Application of lignocellulosic biopolymers in new composite materials, or in biomaterials for medicinal purposes, and in solid wood preservation, are described. The example of an industrial biorefinery installed in southwestern France more than 40 years ago is presented.
Book Synopsis Polymers for Biomedical Applications by : Anil Mahapatro
Download or read book Polymers for Biomedical Applications written by Anil Mahapatro and published by American Chemical Society. This book was released on 2008-04-17 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on applications of polymers for biomedical applications has increased dramatically to find improved medical plastics for this rapidly evolving field. This book brings together various aspects of recent research and developments within academia and industry related to polymers for biomedical applications.
Book Synopsis Dynamic Behavior of Materials, Volume 1 by : Bo Song
Download or read book Dynamic Behavior of Materials, Volume 1 written by Bo Song and published by Springer. This book was released on 2015-10-23 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic Behavior of Materials, Volume 1 represents the first of nine volumes of technical papers presented at the Society for Experimental Mechanics SEM 15th International Congress & Exposition on Experimental and Applied Mechanics, held at Costa Mesa, California, June 8-11, 2015. The full set of proceedings also includes volumes on: Challenges in Mechanics of Time Dependent Materials, Advancement of Optical Methods in Experimental Mechanics, Experimental and Applied Mechanics 16th International Symposium on MEMS and Nanotechnology, 5th International Symposium on the Mechanics of Biological Systems and Materials, International Symposium on the Mechanics of Composite and Multi-functional Materials, Fracture, Fatigue, Failure and Damage Evolution; and Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems.
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 Handbook of Biomaterial Properties by : William Murphy
Download or read book Handbook of Biomaterial Properties written by William Murphy and published by Springer. This book was released on 2016-06-11 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides tabular and text data relating to normal and diseased tissue materials and materials used in medical devices. Comprehensive and practical for students, researchers, engineers, and practicing physicians who use implants, this book considers the materials aspects of both implantable materials and natural tissues and fluids. Examples of materials and topics covered include titanium, elastomers, degradable biomaterials, composites, scaffold materials for tissue engineering, dental implants, sterilization effects on material properties, metallic alloys, and much more. Each chapter author considers the intrinsic and interactive properties of biomaterials, as well as their appropriate applications and historical contexts. Now in an updated second edition, this book also contains two new chapters on the cornea and on vocal folds, as well as updated insights, data, and citations for several chapters.
Book Synopsis Satellite Situation Report by : Goddard Space Flight Center. Office of Public Affairs
Download or read book Satellite Situation Report written by Goddard Space Flight Center. Office of Public Affairs and published by . This book was released on 1977 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Encapsulations by : Alexandru Grumezescu
Download or read book Encapsulations written by Alexandru Grumezescu and published by Academic Press. This book was released on 2016-05-27 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encapsulations, a volume in the Nanotechnology in the Agri-Food Industry series,presents key elements in establishing food quality through the improvement of food flavor and aroma. The major benefits of nanoencapsulation for food ingredients include improvement in bioavailability of flavor and aroma ingredients, improvement in solubility of poor water-soluble ingredients, higher ingredient retention during production process, higher activity levels of encapsulated ingredients, improved shelf life, and controlled release of flavor and aroma. This volume discusses main nanoencapsulation processes such as spray drying, melt injection, extrusion, coacervation, and emulsification. The materials used in nanoencapsulation include lipids, proteins, carbohydrates, cellulose, gums, and food grade polymers. Applications and benefits of nanoencapsulation such as controlled release, protections, and taste masking will be explained in detail. Includes the most up-to-date information on nanoencapsulation and nanocontainer-based delivery of antimicrobials Presents nanomaterials for innovation based on scientific advancements in the field Provides control release strategies to enhance bioactivity, including methods and techniques for research and innovation Provides useful tools to improve the delivery of bioactive molecules and living cells into foods
Book Synopsis Perspectives in Dental Ceramics by : Jack D. Preston
Download or read book Perspectives in Dental Ceramics written by Jack D. Preston and published by Quintessence Publishing (IL). This book was released on 1988 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis In-Situ Gelling Polymers by : Xian Jun Loh
Download or read book In-Situ Gelling Polymers written by Xian Jun Loh and published by Springer. This book was released on 2014-10-01 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the research involving in situ gelling polymers and can be used as a guidebook for academics, industrialists and postgraduates interested in this area. This work summaries the academic contributions from the top authorities in the field and explore the fundamental principles of in situ gelling polymeric networks, along with examples of their major applications. This book aims to provide an up-to-date resource of in situ gelling polymer research.
