COMPOSITES UNIDIRECTIONNELS PET/VERRE-RELATIONS MORPHOLOGIE MISE EN UVRE PROPRIETES MECANIQUES PDF Download
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Author: CATHERINE.. GAUTHIER LEVY
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Languages : fr
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L'ETUDE PRESENTEE CONCERNE LA CARACTERISATION MICROSTRUCTURALE ET MECANIQUE DE COMPOSITES UNIDIRECTIONNELS A MATRICE THERMOPLASTIQUE POLYTEREPHTALATE D'ETHYLENE ET RENFORT EN FIBRES DE VERRE E LONGUES. NOTRE INTERET S'EST TOUT D'ABORD PORTE SUR L'ETUDE DE LA CRISTALLISATION DE LA MATRICE PET A L'AIDE DES TECHNIQUES D'ANALYSE THERMIQUE (DSC), ET DE MICROSCOPIE ELECTRONIQUE EN TRANSMISSION (TEM). L'OBJECTIF VISE CONSISTAIT A DEGAGER L'INFLUENCE DE LA NATURE DE LA MATRICE (PRESENCE D'AGENTS NUCLEANTS) ET DES PARAMETRES DE MISE EN UVRE (TEMPERATURE DE MAINTIEN A L'ETAT FONDU, VITESSE DE REFROIDISSEMENT) EN CONSIDERANT LES DEUX ASPECTS CINETIQUE ET MORPHOLOGIQUE. UNE APPROCHE IDENTIQUE A EGALEMENT ETE APPLIQUEE AU CAS DU RUBAN PULTRUDE PET/VERRE. NOUS AVONS ENSUITE REALISE DIVERSES PLAQUES PET/VERRE ET EVALUE L'INFLUENCE DES CONDITIONS D'ELABORATION SUR LES PROPRIETES FINALES DU COMPOSITE. LA CARACTERISATION MECANIQUE A ETE ENVISAGEE EN ALLANT DES TRES PETITES DEFORMATIONS (ANALYSE MECANIQUE DYNAMIQUE) VERS LES PLUS GRANDES DEFORMATIONS JUSQU'A RUPTURE (MESURES MECANIQUES STATIQUES, MECANIQUE LINEAIRE DE LA RUPTURE). LE COMPORTEMENT A LONG TERME A EGALEMENT ETE APPREHENDE A L'AIDE D'UN TEST DE FATIGUE PAR FLEXION 3 POINTS. L'OPTIMISATION DES PROPRIETES MECANIQUES ET DE FATIGUE NOUS ONT CONDUIT A CHOISIR UN SYSTEME NUCLEE ET UN MODE DE MISE EN UVRE
Author: CATHERINE.. GAUTHIER LEVY
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
L'ETUDE PRESENTEE CONCERNE LA CARACTERISATION MICROSTRUCTURALE ET MECANIQUE DE COMPOSITES UNIDIRECTIONNELS A MATRICE THERMOPLASTIQUE POLYTEREPHTALATE D'ETHYLENE ET RENFORT EN FIBRES DE VERRE E LONGUES. NOTRE INTERET S'EST TOUT D'ABORD PORTE SUR L'ETUDE DE LA CRISTALLISATION DE LA MATRICE PET A L'AIDE DES TECHNIQUES D'ANALYSE THERMIQUE (DSC), ET DE MICROSCOPIE ELECTRONIQUE EN TRANSMISSION (TEM). L'OBJECTIF VISE CONSISTAIT A DEGAGER L'INFLUENCE DE LA NATURE DE LA MATRICE (PRESENCE D'AGENTS NUCLEANTS) ET DES PARAMETRES DE MISE EN UVRE (TEMPERATURE DE MAINTIEN A L'ETAT FONDU, VITESSE DE REFROIDISSEMENT) EN CONSIDERANT LES DEUX ASPECTS CINETIQUE ET MORPHOLOGIQUE. UNE APPROCHE IDENTIQUE A EGALEMENT ETE APPLIQUEE AU CAS DU RUBAN PULTRUDE PET/VERRE. NOUS AVONS ENSUITE REALISE DIVERSES PLAQUES PET/VERRE ET EVALUE L'INFLUENCE DES CONDITIONS D'ELABORATION SUR LES PROPRIETES FINALES DU COMPOSITE. LA CARACTERISATION MECANIQUE A ETE ENVISAGEE EN ALLANT DES TRES PETITES DEFORMATIONS (ANALYSE MECANIQUE DYNAMIQUE) VERS LES PLUS GRANDES DEFORMATIONS JUSQU'A RUPTURE (MESURES MECANIQUES STATIQUES, MECANIQUE LINEAIRE DE LA RUPTURE). LE COMPORTEMENT A LONG TERME A EGALEMENT ETE APPREHENDE A L'AIDE D'UN TEST DE FATIGUE PAR FLEXION 3 POINTS. L'OPTIMISATION DES PROPRIETES MECANIQUES ET DE FATIGUE NOUS ONT CONDUIT A CHOISIR UN SYSTEME NUCLEE ET UN MODE DE MISE EN UVRE
Author: Laura Cilleruelo
Publisher:
ISBN:
Category :
Languages : fr
Pages : 195
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Book Description
L'objectif de d'étude a été d'optimiser, dans le cas du PET renforcé de fibres de verres longues, le couple matériau-procédé afin de répondre aux besoins industriels de performances mécaniques. Ont été en particulier étudiées sur une pièce-type reproduisant des géométries caractéristiques de pièces industrielles les influences sur la microstructure (orientations, taux locaux de fibres et cristallinité) et les propriétés résultantes en flexion et en choc de différents facteurs: conditions de moulage par injection, type d'alimentation de l'outillage, technologie de transformation (injection, injection-compression, comoulage de tissus) et formulation de la matière (à savoir taux de renfort et présence d'additifs de type colorant et agents de nucléation). Les résultats ont conduit à mettre en évidence les paramètres directeurs du procédé (pression de maintien, vitesse de remplissage et température du moule), à optimiser les performances mécaniques en contrôlant les anisotropies et hétérogénéités locales par la position et la taille des seuils et à comprendre les mécanismes de fragilisation induits par la présence de noir de carbone ou d'agents de nucléation, dont les effets sont liés à la fois à la température du moule et à leur nature.
Author: PHILIPPE.. DUMAZET
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
LORS DE LA MISE EN UVRE D'UN POLYMERE SEMI-CRISTALLIN, LES PHENOMENES DE CRISTALLISATION ET D'ECOULEMENT SONT D'UNE GRANDE IMPORTANCE ET RESTENT ETROITEMENT LIES. DANS CE CADRE LA, LE POLYTEREPHTALATE D'ETHYLENE-GLYCOL (PET), RENFORCE DES FIBRES DE VERRE, A RETENU NOTRE ATTENTION EN RAISON DE SES BONNES PROPRIETES MECANIQUES. ETANT DONNE LE CARACTERE HYGROSCOPIQUE ET SEMI-CRISTALLIN DE LA MATRICE, NOUS NOUS SOMMES INTERESSES, DANS UN PREMIER TEMPS, A LA MATRICE SEULE. NOUS AVONS ETUDIE LES PHENOMENES DE DEGRADATION, L'INFLUENCE DES GERMES CRISTALLINS ET DEFINI DES CONDITIONS DE SECHAGE ET DE MISE EN UVRE OPTIMALES. UNE ETUDE CINETIQUE ET MORPHOLOGIQUE COMPARATIVE EFFECTUEE EN REGIME ISOTHERME ET ANISOTHERME A PERMIS DE MODELISER LA CRISTALLISATION. L'ETUDE RHEOLOGIQUE EFFECTUEE, ELLE AUSSI, EN REGIME ANISOTHERME, A PERMIS DE PROCEDER A UNE SECONDE MODELISATION QUI A PU ETRE CORRELEE AVEC LA PRECEDENTE. DANS UN DEUXIEME TEMPS, NOUS NOUS SOMMES INTERESSES AU MATERIAU COMPOSITE. L'ETUDE DE LA CRISTALLISATION N'A PAS CONFIRME LE ROLE PREPONDERANT D'AGENTS NUCLEANTS DES FIBRES DE VERRE. LE MODELE DERIVE DE L'ETUDE DU POLYMERE NON CHARGE S'APPLIQUE DONC LOGIQUEMENT. L'ETUDE RHEOLOGIQUE A PERMIS DE CONSTATER UNE AUGMENTATION DE VISCOSITE DUE AUX FIBRES DE VERRE SANS QUE CELLES-CI AFFECTENT LA CRISTALLISATION
Author: Sabu Thomas
Publisher: Springer Nature
ISBN: 9811596433
Category : Technology & Engineering
Languages : en
Pages : 621
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Book Description
This book presents important developments in green chemistry, with a particular focus on composite materials chemistry. In recent years, natural polymers have generated much interest due to their unique morphology and physical properties. The book gives an introductory overview of green composites, and discusses their emerging interdisciplinary applications in various contemporary fields. The chapters, written by leading experts from industry and academia, cover different aspects of biodegradable green composites and natural polymers including their processing, manufacturing, properties, and applications. This book will be a valuable reference for beginners, researchers as well as industry professionals interested in biodegradable composites.
Author: Bo Song
Publisher: Springer
ISBN: 3319224522
Category : Technology & Engineering
Languages : en
Pages : 265
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Book Description
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.
Author: Agnes Buka
Publisher: World Scientific
ISBN: 1848167997
Category : Science
Languages : en
Pages : 299
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Book Description
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.
Author: Richard Pemberton
Publisher: Woodhead Publishing
ISBN: 0081019130
Category : Technology & Engineering
Languages : en
Pages : 530
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Book Description
Marine Composites: Design and Performance presents up-to-date information and recent research findings on the application and use of advanced fibre-reinforced composites in the marine environment. Following the success of their previously published title: Marine Applications of Advanced Fibre-reinforced Composites which was published in 2015; this exemplary new book provides comprehensive information on materials selection, characterization, and performance. There are also dedicated sections on sandwich structures, manufacture, advanced concepts, naval architecture and design considerations, and various applications. The book will be an essential reference resource for designers, materials engineers, manufactures, marine scientists, mechanical engineers, civil engineers, coastal engineers, boat manufacturers, offshore platform and marine renewable design engineers. - Presents a unique, high-level reference on composite materials and their application and use in marine structures - Provides comprehensive coverage on all aspects of marine composites, including the latest advances in damage modelling and assessment of performance - Contains contributions from leading experts in the field, from both industry and academia - Covers a broad range of naval, offshore and marine structures
Author: Günter Beyer
Publisher: John Wiley & Sons
ISBN: 352734098X
Category : Science
Languages : en
Pages : 434
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Book Description
This first comprehensive overview of reactive extrusion technology for over a decade combines the views of contributors from both academia and industry who share their experiences and highlight possible applications and markets. They also provide updated information on the underlying chemical and physical concepts, summarizing recent developments in terms of the material and machinery used. As a result, readers will find here a compilation of potential applications for reactive extrusion to access new and cost-effective polymeric materials, while using existing compounding machines.
Author: Jerome V. Moloney
Publisher: Springer Science & Business Media
ISBN: 9780387985817
Category : Business & Economics
Languages : en
Pages : 270
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Book Description
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.
Author: Gert Heinrich
Publisher: Springer Nature
ISBN: 3030689204
Category : Technology & Engineering
Languages : en
Pages : 491
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Book Description
The book summarizes recent international research and experimental developments regarding fatigue crack growth investigations of rubber materials. It shows the progress in fundamental as well as advanced research of fracture investigation of rubber material under fatigue loading conditions, especially from the experimental point of view. However, some chapters will describe the progress in numerical modeling and physical description of fracture mechanics and cavitation phenomena in rubbers. Initiation and propagation of cracks in rubber materials are dominant phenomena which determine the lifetime of these soft rubber materials and, as a consequence, the lifetime of the corresponding final rubber parts in various fields of application. Recently, these phenomena became of great scientific interest due to the development of new experimental methods, concepts and models. Furthermore, crack phenomena have an extraordinary impact on rubber wear and abrasion of automotive tires; and understanding of crack initiation and growth in rubbers will help to support the growthing number of activities and worldwide efforts of reduction of tire wear losses and abrasion based emissions.
