Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Approche Micromecanique Du Comportement En Fatigue Dun Materiau Composite A Matrice Aluminium Renforce Par Fibres Dalumine
Download Approche Micromecanique Du Comportement En Fatigue Dun Materiau Composite A Matrice Aluminium Renforce Par Fibres Dalumine full books in PDF, epub, and Kindle. Read online Approche Micromecanique Du Comportement En Fatigue Dun Materiau Composite A Matrice Aluminium Renforce Par Fibres Dalumine ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Comportement mécanique des composites à matrice organique by : Marco Gigliotti
Download or read book Comportement mécanique des composites à matrice organique written by Marco Gigliotti and published by ISTE Group. This book was released on 2017-09-01 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: L’utilisation des composites à matrice organique pour des applications structurales à haute température est de plus en plus souvent envisagée, notamment dans certaines zones de turbomachines aéronautiques. A cette fin, il devient nécessaire d’analyser les effets du vieillissement thermo-oxydant sur le comportement mécanique d’un polymère et des composites associés. Cet ouvrage met en relief des méthodologies expérimentales originales qui permettent, par analyse inverse, de développer et d’identifier une loi de comportement du polymère dépendant du vieillissement ainsi que les déformations d’origine chimique. Ces informations sont utilisées pour le calcul des contraintes internes induites par un vieillissement thermo-oxydant dans des composites unidirectionnels à fibres continues de carbone. Comportement mécanique des composites à matrice organique se différencie des autres ouvrages par son approche. Il examine des lois de comportement thermomécaniques locales dépendant de l’oxydation grâce à l’emploi d’essais couplés et non couplés à l’échelle microscopique. Il présente des modèles originaux afin d'intégrer toute la richesse de la phénoménologie observée expérimentalement, grâce à l'emploi de variables internes correctement choisies.
Book Synopsis Mécanismes d'endommagement et comportements mécaniques d'un composite cimentaire fibré multi-échelles sous sollicitations sévères by : Édouard Parant
Download or read book Mécanismes d'endommagement et comportements mécaniques d'un composite cimentaire fibré multi-échelles sous sollicitations sévères written by Édouard Parant and published by LCPC. This book was released on 2004 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail porte sur l'étude du comportement mécanique et des mécanismes d'endommagement d'un composite cimentaire fibré multi-échelles soumis à des sollicitations sévères : fatigue, choc et fluage en ambiance agressive. L'analyse des mécanismes de fissuration des matrices cimentaires conduit à l'utilisation de trois dimensions de fibres métalliques afin d'intervenir à chaque étape du processus de fissuration. La matrice cimentaire est ultra-compacte et résistante (sbc > 200 MPa) et la fraction volumique du renfort atteint 11 %. Le renfort multi-échelles se caractérise par la mise en action graduelle et continue des différentes échelles de fibres jusqu'au pic d'effort. Une détermination de la résistance en traction uniaxiale (> 20 MPa) à partir d'essais de flexion 4 points sur dalles minces en utilisant une approche inverse est validée. Il est montré que le matériau étudié est élasto-plastique avec écrouissage positif en traction. Le renfort multi-échelles, et particulièrement les micro-fibres, amplifient les phénomènes visqueux dans la matrice cimentaire en y améliorant le transfert des efforts. Le gain absolu de résistance en traction, sous sollicitations dynamiques, est estimé par approche inverse à 1,5 Mpa/u.log. Le comportement en fatigue est limité par le faible élancement des méso-fibres. Une corrélation forte existe entre la durée de vie en fatigue et l'état d'endommagement initial (premier chargement statique). Une courbe de Wöhler corrigée est reconstruite connaissant le comportement statique caractéristique et l'état initial de déformation des corps d'épreuve. Sous sollicitation de service, la fissuration fine et diffuse, induite par l'efficacité du renfort multi-échelles, conduit à une cicatrisation presque totale en présence d'eau de corps d'épreuve pré-endommagés par fatigue et maintenus chargés en solution saline.
Book Synopsis Fatigue of Textile and Random Fibre Reinforced Composites by : Valter Carvelli
Download or read book Fatigue of Textile and Random Fibre Reinforced Composites written by Valter Carvelli and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fiber Volume Fraction Effects on Fatigue Response of a SCS-6/Ti-15-3 Metal Matrix Composite at Elevated Temperature by : Sean C. Coghlan
Download or read book Fiber Volume Fraction Effects on Fatigue Response of a SCS-6/Ti-15-3 Metal Matrix Composite at Elevated Temperature written by Sean C. Coghlan and published by . This book was released on 1997-09-01 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine the effects of fiber volume fraction on the fatigue behavior of Silicon Carbide fiber-reinforced Titanium alloy, SCS-6/Ti-15-3. Three fiber volume fractions were investigated; 15%, 25%, and 42%. The tests were performed under fully-reversed, strain- controlled conditions at 427 C. The primary objectives of this study were to develop a fatigue life diagram and to document the damage and failure mechanisms. Compressive loads on the slender specimens were kept from buckling the specimens through the use of a buckling guide. This device allows unrestricted axial movement of the composite, while preventing any out-of-plane motion. No buckling damage due to compression was found in any of the specimens. Modulus behavior and stress versus strain curves were recorded during cycling for each test. An applied strain range between 0.5% and 1.1% was used for the majority of the tests. This resulted in fatigue lives between approximately 10, 000 and 100,000 cycles. The resulting fatigue life diagram showed similar life at strain ranges at and above 0.008 mm/mm for all fiber volume fractions. At strain levels below 0.008 mm/mm, there was an increasing fatigue life with increasing fiber volume fraction. The 15% and 42% V sub f material was consolidated with a molybdenum cross-weave to hold the fibers in alignment. The 25% V sub f material had a titanium-niobium cross-weave for the same purpose. The Mo cross-weave was present on every fracture surface of the 15% and 42% V sub f material. This indicated that it was detrimental to the fatigue life of the composite. No cross-weave material was found on the fracture surfaces of the 25% V sub f. Major cause of specimen failure was the initiation and propagation of fatigue cracks in the matrix that were perpendicular to the applied load.
Book Synopsis Microstructural Characterisation of Fibre-Reinforced Composites by : John Summerscales
Download or read book Microstructural Characterisation of Fibre-Reinforced Composites written by John Summerscales and published by CRC Press. This book was released on 1998-08-18 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past 50 years, great progress has been made in developing artificial fiber-reinforced composite materials, generally using filaments with microscopic diameters. An array of reinforcement forms can be used in commercial applications - with the microstructure being a critical factor in realizing the required properties in a material. Microstructural Characterisation of Fibre-Reinforced Composites comprehensively examines the application of advanced microstructural characterization techniques to fiber-reinforced composites.
Book Synopsis Matériaux composites by : Jean-Marie Berthelot
Download or read book Matériaux composites written by Jean-Marie Berthelot and published by Tec & Doc Lavoisier. This book was released on 1999 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthèse unanimement reconnue, Matériaux composites apporte tous les éléments nécessaires à une bonne compréhension du comportement mécanique des matériaux et structures composites. De fait, les différentes parties ont été développées de manière à aboutir à une continuité des concepts et théories, fournissant ainsi une approche fondamentale unifiée. Après avoir présenté la constitution puis la mise en œuvre des matériaux composites, l'ouvrage traite des outils de modélisation du comportement mécanique des structures en matériaux composites stratifiés et sandwichs. Il aborde ensuite les problèmes de dimensionnement des structures. Son contenu et sa progression ont été conçus avec quatre objectifs principaux : • considérer le matériau composite comme un matériau traditionnel ; • intégrer l'apport de la conception assistée par ordinateur dans la résolution des problèmes de dimensionnement des structures ; • aborder les difficultés de manières progressives ; • confronter systématiquement la modélisation avec le comportement réel des matériaux et structures. Entièrement actualisée, cette 3e édition a vu ses six derniers chapitres profondément modifiés et augmentés. Elle bénéficie également de l'ajout de deux annexes. Rigoureux et didactique, Matériaux composites constitue la référence incontournable des étudiants (2e et 3e cycles), ingénieurs, chercheurs et techniciens supérieurs.
Book Synopsis Stress Analysis of Fiber-reinforced Composite Materials by : M. W. Hyer
Download or read book Stress Analysis of Fiber-reinforced Composite Materials written by M. W. Hyer and published by McGraw-Hill Science, Engineering & Mathematics. This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text focuses on the mechanics aspects of fibre-reinforced composite materials. Classical lamination theory is developed and much of the volume discusses the stresses due to applied deformations, applied loads, and temperature changes. No prior knowledge of composite materials is assumed.
Book Synopsis Fibre Reinforcements for Composite Materials by : A. R. Bunsell
Download or read book Fibre Reinforcements for Composite Materials written by A. R. Bunsell and published by Elsevier Science Limited. This book was released on 1988 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book to cover - in a wealth of detail - all types of synthetic fibres used in composites. Synthetic fibre reinforced composites are at the centre of a revolution in materials science: the concept of combining two or more different materials to obtain new and remarkable properties seems destined to become the central issue. Fibre reinforced materials have properties which are unattainable with conventional materials. Materials in all classes of solids can now be reinforced with fine fibres and improvements in strength, tenacity, fatigue and other properties obtained. This new book covers the whole range of synthetic fibres used in composites. It explains their development and manufacture as well as giving detailed information on properties and how these are determined by their microstructure. Specialists from all over the world have written chapters on each type of fibre. Two chapters present the latest knowledge on carbon fibre manufacture from both PAN and pitch, surface treatment and microstructure viewpoints. Other chapters describe industrial organic fibres and how other organic fibres with remarkable properties are produced by either making their molecular structures more complex or by straightening out the molecular structure of simple polymers. The latest fine ceramic fibres are covered as are the well-established glass fibre and ceramic fibres made by deposition techniques. Finally the ways of determining fibre properties and microstructure are explained. This is a fast-moving and important field; much of the future economies of advanced countries will depend on new materials, in particular composites. The book is a must for all those concerned with materials science whether they are in the laboratory, lecture room, board room or government planning office. It will serve both as a detailed introduction to the subject to those readers working in related fields and as a work of reference to those already specialising in the subject.
