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Modele De Propagation De Fissure A Haute Temperature Avec Interaction Fatigue Fluage Oxydation
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Book Synopsis MODELE DE PROPAGATION DE FISSURE A HAUTE TEMPERATURE AVEC INTERACTION FATIGUE-FLUAGE-OXYDATION by : PASCAL.. PRIGENT
Download or read book MODELE DE PROPAGATION DE FISSURE A HAUTE TEMPERATURE AVEC INTERACTION FATIGUE-FLUAGE-OXYDATION written by PASCAL.. PRIGENT and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LA TENUE DES MOTEURS D'AVIONS PASSE DE PLUS EN PLUS PAR LES ANALYSES DE DUREES DE VIE SOUS SOLLICITATIONS DE SERVICE, FAISANT INTERVENIR, EN PARTICULIER, LES PHENOMENES DUS AUX TEMPERATURES ELEVEES. UNE NOUVELLE LOI DE PROPAGATION DES FISSURES EST ELABOREE, AVEC POUR OBJECTIF LES ANALYSES SYSTEMATIQUES DES DISQUES DE TURBINE. ELLE EST DETERMINEE ET UTILISEE SUR UN ALLIAGE POUR DISQUES, L'ASTROLOY (METALLURGIE DES POUDRES), A 650C. CETTE LOI A CARACTERE PHENOMENOLOGIQUE EST CONSTRUITE EN CHERCHANT A RENDRE COHERENTES DES OBSERVATIONS DE NATURES DIFFERENTES (EXPERIMENTALE, NUMERIQUE ET PHYSIQUE). EN PARTICULIER, ELLE S'APPUIE SUR: 1) UN VASTE PROGRAMME EXPERIMENTAL, MENE EN CONCERTATION ENTRE L'ONERA, L'ENSMP ET LA SNECMA, QUI A PERMIS, ENTRE AUTRES, DE METTRE EN EVIDENCE LES EFFETS DES TEMPS DE MAINTIEN A HAUTE TEMPERATURE, 2) UN ENSEMBLE DE SIMULATIONS NUMERIQUES MENEES EN VISCOPLASTICITE CYCLIQUE AVEC UN CODE D'ELEMENTS FINIS. LES PHENOMENES D'OUVERTURE-FERMETURE ET DE REDISTRIBUTIONS DE CONTRAINTES SONT ETUDIES EN DETAIL EN FONCTION DE LA PROPAGATION DE LA FISSURE (METHODE DE RELACHEMENT DES NUDS), 3) DES OBSERVATIONS FAITES PAR AILLEURS SUR LES CINETIQUES D'OXYDATION ET LEUR INFLUENCE SUR LA FRAGILISATION DU MATERIAU. UN MODELE DE PROPAGATION EST AINSI ELABORE DANS LE CADRE DE LA MECANIQUE LINEAIRE DE LA RUPTURE, EN COMBINANT PROPAGATION PAR FATIGUE ET PAR FLUAGE, EFFET MECANIQUE DE RELAXATION DU SEUIL DE NON-PROPAGATION ET EFFET DE FRAGILISATION PAR OXYDATION EN TETE DE FISSURE. IL PERMET DE TRADUIRE FIDELEMENT LA PROPAGATION SOUS DES CYCLES DE CHARGEMENT DE FORME COMPLEXE, FAISANT INTERVENIR DES PHASES DE MAINTIEN AU COURS DES TRANSITOIRES DE DECHARGE
Book Synopsis Fatigue under Thermal and Mechanical Loading: Mechanisms, Mechanics and Modelling by : J. Bressers
Download or read book Fatigue under Thermal and Mechanical Loading: Mechanisms, Mechanics and Modelling written by J. Bressers and published by Springer Science & Business Media. This book was released on 1996-04-30 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains 50 contributions presented at the symposium `Fatigue under Thermal and Mechanical Loading'. The symposium addressed the mechanisms, mechanics and modelling of thermal and thermal-mechanical load effects on conventional and advanced structural materials. The proceedings provide an update of the research efforts in thermal and thermal-mechanical fatigue. The papers cover a wide range of materials, including metallic alloys from steels to advanced superalloy single crystals, ceramics as well as composites. Topics encompass recent developments in specimen and component testing techniques, mechanisms and mechanics of inelastic deformation, crack initiation and crack growth, as well as damage modelling for life-time prediction. The book is of interest to materials scientists, mechanical engineers and design engineers involved in the design of components for use at high temperatures.
Book Synopsis Interactions fatigue-fluage sur le comportement en fissuration à haute température des superalliages pour disques de turbine. Effets d'oxydation by : Christophe Carbou
Download or read book Interactions fatigue-fluage sur le comportement en fissuration à haute température des superalliages pour disques de turbine. Effets d'oxydation written by Christophe Carbou and published by . This book was released on 2000 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE ETUDE PORTE SUR LE COMPORTEMENT EN FISSURATION A 750\C DE SUPERALLIAGES A BASE DE NICKEL POUR DISQUES DE TURBINE. CES ALLIAGES AVAIENT SURTOUT ETE AMPLEMENT ETUDIES JUSQU'AUX TEMPERATURES DE 600-650\C MAIS LE DEVELOPPEMENT DES NOUVEAUX MOTEURS NECESSITE UNE MEILLEURE COMPREHENSION DES INTERACTIONS POSSIBLES ENTRE LES DIFFERENTS FACTEURS QUE SONT LA FATIGUE, LE FLUAGE ET L'OXYDATION QUI GOUVERNENT L'ENDOMMAGEMENT AUX PLUS HAUTES TEMPERATURES. A 750\C, LE MODE DE FISSURATION INTERGRANULAIRE ENTRAINE UNE FORTE SENSIBILITE DES ALLIAGES AUX PARAMETRES MICROSTRUCTURAUX. UNE ETUDE DE FOND A ETE CONDUITE SUR LES INTERACTIONS FATIGUE-FLUAGE SUR UNE MICROSTRUCTURE DE REFERENCE D'UN ALLIAGE : L'ASTROLOY ATGP3. LES TENDANCES OBSERVEES ONT ETE VALIDEES SUR D'AUTRES MICROSTRUCTURES DE CE MATERIAU OU SUR D'AUTRES ALLIAGES : LE N18 OU SUR LE NR3 RECEMMENT DEVELOPPE PAR L'ONERA. L'ETUDE A ETE ABORDEE EN DECOUPLANT LES EFFETS DE FLUAGE ET D'OXYDATION, TOUS DEUX THERMIQUEMENT ACTIVES, PAR UNE CARACTERISATION EN FATIGUE-FLUAGE SOUS VIDE. LA METHODE EXPERIMENTALE MISE AU POINT, BASEE SUR LE SUIVI ELECTRIQUE DE LA FISSURE, A PERMIS DE DISTINGUER LA PROPAGATION A CHAQUE REMISE EN CHARGE DE CELLE SURVENANT PENDANT LE PALIER POUR LES SPECTRES DE CHARGEMENT TRAPEZOIDAUX APPLIQUES. DES INTERACTIONS ENTRE L'ENDOMMAGEMENT CYCLIQUE ET STATIQUE ONT AINSI PU ETRE IDENTIFIEES ET QUANTIFIEES POUR ABOUTIR A UN MODELE PHENOMENOLOGIQUE DE PROPAGATION QUI INTEGRE LES PARAMETRES DE FISSURATION QUE SONT LA FORME DU SPECTRE DE CHARGEMENT ET LE FACTEUR D'INTENSITE DE CONTRAINTE. PAR AILLEURS, DES ESSAIS SOUS AIR ONT ETE CONDUITS POUR PERMETTRE D'IDENTIFIER LES EFFETS COMPLEXES DE L'ENVIRONNEMENT A 750\C. L'EVOLUTION DE LA PRECIPITATION GAMMA PRIME INTRAGRANULAIRE
Book Synopsis PROPAGATION DE FISSURE A HAUTE TEMPERATURE DANS UN ACIER INOXYDABLE AUSTENITIQUE by : JEAN PAUL.. POLVORA
Download or read book PROPAGATION DE FISSURE A HAUTE TEMPERATURE DANS UN ACIER INOXYDABLE AUSTENITIQUE written by JEAN PAUL.. POLVORA and published by . This book was released on 1998 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE ETUDE PORTE SUR LA PROPAGATION DE FISSURE A 650C DANS UN ACIER INOXYDABLE AUSTENITIQUE DE NUANCE Z2 CND 17-12. ELLE EST BASEE SUR TRAVAIL UN EXPERIMENTAL (37 ESSAIS) QUI CONCERNE, TOUT D'ABORD, DES EPROUVETTES DE TYPE CT SOLLICITEES A 650C EN FATIGUE, FLUAGE, FATIGUE-FLUAGE EN FORCE IMPOSEE. ENSUITE, DES TUBES FISSURES AVEC ENTAILLE CIRCONFERENTIELLE INTERNE SOLLICITES EN FLEXION 4 POINTS A DEPLACEMENT IMPOSE. EN UTILISANT LES OUTILS DE LA MECANIQUE DE LA RUPTURE (PARAMETRES K, J ET C*) ET DANS LE CADRE D'UNE APPROCHE GLOBALE DE LA PROPAGATION, IL S'AGIT ICI DE RECHERCHER UNE METHODOLOGIE DE CALCUL PERMETTANT DE PREVOIR L'EVOLUTION D'UNE FISSURE. LES OBSERVATIONS MICROSCOPIQUES ONT PERMIS D'IDENTIFIER DES FACIES DE RUPTURE TRANSGRANULAIRE OU MIXTE EN FATIGUE ET ESSENTIELLEMENT INTERGRANULAIRE EN FATIGUE-FLUAGE ET FLUAGE. EN FATIGUE CONTINUE, LA LOI DE PARIS DU MATERIAU A 650C RELIE LA VITESSE DE FISSURATION A LA VARIATION DU FACTEUR D'INTENSITE DES CONTRAINTES. EN FLUAGE PUR SUR EPROUVETTE CT, LA VITESSE PROPAGATION SUIT UNE CORRELATION QUI LA LIE A L'EVOLUTION DU PARAMETRE C* QUI PEUT ETRE ESTIME EXPERIMENTALEMENT, NUMERIQUEMENT ET ANALYTIQUEMENT. LES ESSAIS DE FATIGUE-FLUAGE AVEC TEMPS DE MAINTIEN COMPRIS ENTRE 1/2H ET 48H ONT MIS EN EVIDENCE UNE ACCELERATION SUR LA VITESSE DE FISSURATION PAR RAPPORT A LA LOI DE PARIS OBTENUE EN FATIGUE CONTINUE. POUR T#M 5H, LA VITESSE DIMINUE PUIS AUGMENTE A NOUVEAU ET SUIT UNE PENTE GLOBALEMENT PLUS RAIDE QUE LA LOI DE PARIS DU MATERIAU. CES EFFETS, ASSOCIES AUX OBSERVATIONS MICROSCOPIQUES, TRADUISENT L'INFLUENCE DES MECANISMES DE DEFORMATION ET DE LA LOI DE COMPORTEMENT DE FLUAGE SUR LA CINETIQUE DE FISSURATION. LA MODELISATION DES CES ESSAIS A PARTIR D'UN MODELE DE SOMMATION DES VITESSES DE FATIGUE ET DE FLUAGE FOURNI DES RESULTATS SATISFAISANTS QUAND LE PARAMETRE C* EST EVALUE A PARTIR DE L'ESTIMATION SIMPLIFIEE C*#S. POUR CELA, L'EVOLUTION DE L'ENDOMMAGEMENT DE FLUAGE AU COURS DE L'ESSAI DOIT ETRE PRISE EN COMPTE DANS LE CALCUL DES PARAMETRES ET DANS LEUR INTEGRATION.
Download or read book INIS Atomindex written by and published by . This book was released on 1983 with total page 1308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Simulation des vitesses de propagation d'une fissure dans un alliage à base de nickel à haute température sous vide et sous chargement de fatigue-fluage by : Alexandre Piard
Download or read book Simulation des vitesses de propagation d'une fissure dans un alliage à base de nickel à haute température sous vide et sous chargement de fatigue-fluage written by Alexandre Piard and published by . This book was released on 2003 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objectif de ce travail est de simuler les vitesses de fissuration sous chargement cyclique avec ou sans temps de maintien à haute température dans un environnement inerte, pour un matériau " fragile au fluage ", un superalliage à base de nickel. Les essais de fissuration avaient été menés à 750ʿC sous vide pour mettre en relief les interactions des effets d'endommagement induits par le fluage et la fatigue. Pour représenter la partie cyclique du chargement, la simulation fait intervenir un champ d'endommagement cyclique au voisinage de la pointe de fissure et la fermeture de fissure. La simulation lors des temps de maintien utilise un champ d'endommagement qui dépend des déformations de fluage et qui prend en compte les influences de l'émoussement en pointe de fissure et du temps de remise en chargement. Les interactions fatigue fluage reposent sur l'association des deux endommagements de fatigue et de fluage et sur un paramètre d'endommagement global.
Book Synopsis ETUDE DE LA PROPAGATION DES FISSURES EN FATIGUE-FLUAGE-OXYDATION A 650C DANS UN SUPERALLIAGE BASE NICKEL by : ALAIN.. DIBOINE
Download or read book ETUDE DE LA PROPAGATION DES FISSURES EN FATIGUE-FLUAGE-OXYDATION A 650C DANS UN SUPERALLIAGE BASE NICKEL written by ALAIN.. DIBOINE and published by . This book was released on 1986 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: RECHERCHE D'UN PARAMETRE DE CHARGEMENT SUSCEPTIBLE DE REPRESENTER CORRECTEMENT LA PROPAGATION DE FISSURES A HAUTE TEMPERATURE. DANS CE CAS, LE FACTEUR D'INTENSITE DE CONTRAINTE K EST LE PARAMETRE QUI PERMET LES MEILLEURS CORRELATIONS ENTRE VITESSE DE PROPAGATION ET VARIABLES EXPERIMENTALES. ACTION DE L'OXYGENE SUR LA PROPAGATION. MODELISATION DE LA PROPAGATION EN FLUAGE ET FATIGUE-FLUAGE
Book Synopsis Modélisation de la propagation de fissure dans les aubes de turbines monocristallines by : Jean-Luc Bouvard
Download or read book Modélisation de la propagation de fissure dans les aubes de turbines monocristallines written by Jean-Luc Bouvard and published by . This book was released on 2006 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: L’objectif de ce travail a tout d’abord été de développer une méthodologie de simulation numérique de propagation de fissure, en appliquant une approche couplée en chargement cyclique. On s’est intéressé, plus particulièrement, à l’utilisation d’éléments de zones cohésives couplés à une loi de comportement spécifique, afin de simuler, sans discontinuité, et avec un caractère prédictif, l’avancée d’une fissure. Enfin, nous avons établi un modèle phénoménologique de propagation, dans le cadre de la Mécanique Linéaire de la rupture, qui rend compte des effets de fissure courte et, à haute température, des effets de fluage et d’oxydation sur la vitesse de propagation par fatigue. L’objectif de ce modèle est de fournir aux Bureaux d’Etudes un outil rapide et facile à mettre en œuvre afin de dimensionner des pièces industrielles telles que les aubes de turbines. Cette étude, très riche en termes de résultats expérimentaux de propagation de fissure, a permis de développer une approche locale basée sur les modèles de zones cohésives pour la simulation numérique de la propagation de fissure. Mais les perspectives futures de l’application de telles méthodes sont de pouvoir fournir des informations sur le couplage complexe qui existe entre la plasticité en pointe de fissure et le phénomène de propagation qui permettront d’enrichir des modèles phénoménologiques applicables en Bureaux d’Etudes
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.
Book Synopsis Dictionary of Building and Civil Engineering by : Don Montague
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Ceramic Materials by : Philippe Boch
Download or read book Ceramic Materials written by Philippe Boch and published by John Wiley & Sons. This book was released on 2010-01-05 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is primarily an introduction to the vast family of ceramic materials. The first part is devoted to the basics of ceramics and processes: raw materials, powders synthesis, shaping and sintering. It discusses traditional ceramics as well as “technical” ceramics – both oxide and non-oxide – which have multiple developments. The second part focuses on properties and applications, and discusses both structural and functional ceramics, including bioceramics. The fields of abrasion, cutting and tribology illustrate the importance of mechanical properties. It also deals with the questions/answers of a ceramicist regarding electronuclear technology. As chemistry is an essential discipline for ceramicists, the book shows, in particular, what soft chemistry can contribute as a result of sol-gel methods.
Book Synopsis CASTI Metals Blue Book - Welding Filler Metals by : Barry M. Patchett
Download or read book CASTI Metals Blue Book - Welding Filler Metals written by Barry M. Patchett and published by . This book was released on 2000-01-01 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fracture Mechanics and Crack Growth by : Naman Recho
Download or read book Fracture Mechanics and Crack Growth written by Naman Recho and published by John Wiley & Sons. This book was released on 2012-12-27 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent advances related to the following two topics: how mechanical fields close to material or geometrical singularities such as cracks can be determined; how failure criteria can be established according to the singularity degrees related to these discontinuities. Concerning the determination of mechanical fields close to a crack tip, the first part of the book presents most of the traditional methods in order to classify them into two major categories. The first is based on the stress field, such as the Airy function, and the second resolves the problem from functions related to displacement fields. Following this, a new method based on the Hamiltonian system is presented in great detail. Local and energetic approaches to fracture are used in order to determine the fracture parameters such as stress intensity factor and energy release rate. The second part of the book describes methodologies to establish the critical fracture loads and the crack growth criteria. Singular fields for homogeneous and non-homogeneous problems near crack tips, v-notches, interfaces, etc. associated with the crack initiation and propagation laws in elastic and elastic-plastic media, allow us to determine the basis of failure criteria. Each phenomenon studied is dealt with according to its conceptual and theoretical modeling, to its use in the criteria of fracture resistance; and finally to its implementation in terms of feasibility and numerical application. Contents 1. Introduction. Part 1: Stress Field Analysis Close to the Crack Tip 2. Review of Continuum Mechanics and the Behavior Laws. 3. Overview of Fracture Mechanics. 4. Fracture Mechanics. 5. Introduction to the Finite Element Analysis of Cracked Structures. Part 2: Crack Growth Criteria 6. Crack Propagation. 7. Crack Growth Prediction in Elements of Steel Structures Submitted to Fatigue. 8. Potential Use of Crack Propagation Laws in Fatigue Life Design.
Book Synopsis Advances in Construction Materials 2007 by : Christian U. Grosse
Download or read book Advances in Construction Materials 2007 written by Christian U. Grosse and published by Springer Science & Business Media. This book was released on 2007-08-14 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is a compilation of recent research results on building construction materials. Civil Engineers and Materials Scientists from all over the world present their ideas for further material developments, the testing of structures and solutions for in situ applications. Many of the innovations, composites and the design of existing material mixes, especially for concrete, are discussed.
Download or read book Superalloys 2020 written by Sammy Tin and published by Springer Nature. This book was released on 2020-08-28 with total page 1098 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 14th International Symposium on Superalloys (Superalloys 2020) highlights technologies for lifecycle improvement of superalloys. In addition to the traditional focus areas of alloy development, processing, mechanical behavior, coatings, and environmental effects, this volume includes contributions from academia, supply chain, and product-user members of the superalloy community that highlight technologies that contribute to improving manufacturability, affordability, life prediction, and performance of superalloys.
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.
Download or read book Superalloys 2012 written by Eric S. Huron and published by John Wiley & Sons. This book was released on 2012-10-02 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt: A superalloy, or high-performance alloy, is an alloy that exhibits excellent mechanical strength at high temperatures. Superalloy development has been driven primarily by the aerospace and power industries. This compilation of papers from the Twelfth International Symposium on Superalloys, held from September 9-13, 2012, offers the most recent technical information on this class of materials.
