Modélisation et méthodes numériques multi-échelles en élasticité non linéaire

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ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.:/5 (69 download)

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Book Synopsis Modélisation et méthodes numériques multi-échelles en élasticité non linéaire by : Antoine Gloria

Download or read book Modélisation et méthodes numériques multi-échelles en élasticité non linéaire written by Antoine Gloria and published by . This book was released on 2007 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail porte principalement sur l’étude mathématique de méthodes numériques pour l’homogeneisation de fonctionnelles intégrales utilisées en élasticité non linéaire. Ces méthodes couplent, au niveau mésoscopique, un matériau hyperélastique hétérogène ou un réseau de liens en interaction, avec, au niveau macroscopique, un modèle d’élasticité non linéaire. La loi de constitution macroscopique est obtenue par la résolution de problèmes mésoscopiques, continus ou discrets. Aux chapitres 1, 2 et 3 on introduit les modèles mécaniques et les outils mathématiques et numériques utilisés par la suite. Aux chapitres 5, 6 et 7, on présente une méthode directe de résolution numérique du comportement homogénéisé d’un matériau composite périodique en grandes déformations et un cadre général pour l’analyse des méthodes d'homogénéisation numérique. On démontre notamment la convergence de méthodes numériques classiques sous des hypothèses générales ainsi qu’un résultat de correcteur numérique. On étend enfin les résultats au couplage avec des méthodes de sur-échantillonnage. Aux chapitres 8, 9 et 10, nous considérons une modélisation mesoscopique par un système discret. Nous étudions d’abord un problème de G-fermeture pour un réseau de résistances. Au chapitre suivant nous démontrons un résultat de représentation intégrale pour l’énergie d’un système de spins en interaction. Enfin, nous dérivons un modèle hyperélastique continu à partir d’un réseau stochastique de points en interaction, et l’appliquons pour démontrer la convergence de modèles discrets développés en mécanique. Dans une dernière partie, chapitre 11, nous présentons une nouvelle méthode numérique pour résoudre des problèmes d’interaction fluide structure, ou la structure est décrite par une coque tridimensionnelle.

Méthode asymptotique numérique pour l'étude multi échelle des instabilités dans les matériaux hétérogènes

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Publisher :
ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (69 download)

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Book Synopsis Méthode asymptotique numérique pour l'étude multi échelle des instabilités dans les matériaux hétérogènes by : Saeid Nezamabadi

Download or read book Méthode asymptotique numérique pour l'étude multi échelle des instabilités dans les matériaux hétérogènes written by Saeid Nezamabadi and published by . This book was released on 2009 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: La modélisation multi-échelle des matériaux hétérogènes est un challenge en mécanique numérique. Dans le contexte non linéaire, les propriétés effectives des matériaux hétérogènes ne peuvent pas être obtenues par les techniques utilisées pour les milieux linéaires car le principe de superposition n'est plus valable. Ainsi, dans le contexte des éléments finis, une alternative au maillage de l'ensemble de la structure avec la prise en compte de toutes les hétérogénéités, est l'utilisation de la méthode d'éléments finis multi-échelles (EF2). Les techniques de ce type offrent de nombreux avantages, tels que la prise en compte : des grandes déformations au niveau micro et macro sont souvent résolus par les procédures classiques de Newton-Raphson, qui sont généralement adaptées à la résolution des problèmes non linéaires mais qui présentent des difficultés en présence d'instabilités. Dans cette thèse, la combinaison de la méthode des éléments finis multi-échelles (EF2) et la méthode asymptotique numérique (MAN), surnommée MAN multi-échelle, permet de mettre en œuvre une technique numérique efficace pour traiter les problèmes d'instabilités dans le cadre des matériaux hétérogènes. Ces instabilités peuvent survenir à la fois au niveau micro et au niveau macro. Différentes classes de comportement des matériaux ont été implantées dans notre procédure. Pour améliorer le conditionnement du problème multi-échelle à résoudre, une technique d'homogénéisation du second ordre a été également adaptée dans le cadre de la technique MAN multi-échelle. Par ailleurs, afin de réduire le temps de calcul, quelques techniques ont été proposées dans ce travail

ETUDES NUMERIQUES DE PROBLEMES D'ELASTICITE NON LINEAIRE

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Publisher :
ISBN 13 :
Total Pages : 113 pages
Book Rating : 4.:/5 (49 download)

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Book Synopsis ETUDES NUMERIQUES DE PROBLEMES D'ELASTICITE NON LINEAIRE by : JEAN-MARC.. POUYOT

Download or read book ETUDES NUMERIQUES DE PROBLEMES D'ELASTICITE NON LINEAIRE written by JEAN-MARC.. POUYOT and published by . This book was released on 1984 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: ON ENVISAGE DIVERS MODELES PERMETTANT DE PRENDRE EN COMPTE LA TRES FAIBLE COMPRESSIBILITE DE CES MATERIAUX. ON REALISE L'ETUDE MATHEMATIQUE DE CES PROBLEMES ET LA CONVERGENCE DES APPROXIMATIONS. LE COMPORTEMENT LORSQUE LE MODULE DE COMPRESSIBILITE TEND VERS ZERO EST AUSSI ETUDIE. ON DECRIT ENSUITE TOUT CE QUI CONCERNE LES METHODES NUMERIQUES ET LEUR MISE EN OEUVRE. DE NOMBREUX ESSAIS NUMERIQUES SONT PRESENTES VALIDANT CES METHODES. DE PLUS DES CONFIGURATIONS SEVERES SONT ETUDIEES AINSI QUE LES DIFFICULTES SPECIFIQUES QUI S'EN SUIVENT

Simulation numérique des problèmes mécaniques non linéaires par approche mixte MEF-MESHLESS

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (127 download)

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Book Synopsis Simulation numérique des problèmes mécaniques non linéaires par approche mixte MEF-MESHLESS by : Yosr Ghozzi

Download or read book Simulation numérique des problèmes mécaniques non linéaires par approche mixte MEF-MESHLESS written by Yosr Ghozzi and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans le présent travail, nous mettons en œuvre un développement numérique d'une méthode de discrétisation mixte MEF/Meshless pour la résolution de problème mécanique fortement non-linéaire. Une attention particulière est attribuée à la construction des fonctions de forme par approximation diffuse. Dans le but de traiter des problèmes de la mécanique des solides en transformations finies, nous développons une méthode numérique dite « mixte » unissant à la fois la méthode numérique Meshless afin de discrétiser les zones à fort gradient de déformation, et la méthode des Eléments Finis (MEF) pour les zones les moins sollicitées. Nous veillons donc à assurer le couplage entre ces deux méthodes de discrétisation à travers la mise en œuvre de techniques spécifiques, notamment pour la continuité du domaine et sa consistance en premier lieu, mais aussi pour le choix de la méthode d'intégration numérique appropriée. Nous testons par la suite la fiabilité et la performance du modèle par la mise en place d'une étude comparative avec un modèle MEF standard conçu pour les mêmes conditions numériques, afin de tester la performance des techniques numériques attribuées au modèle « mixte ». Nous développons, par la suite, un modèle de comportement à travers une description des transformations finies. Nous adoptons ainsi une discrétisation spatiale en éléments «assumed strain», et une discrétisation temporelle adaptées. Pour valider notre modèle « mixte » retenu, nous réalisons une étude comparative avec des exemples simples de calcul non linéaire.

Viscoelastic Solids (1998)

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Publisher : CRC Press
ISBN 13 : 1351355643
Total Pages : 476 pages
Book Rating : 4.3/5 (513 download)

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Book Synopsis Viscoelastic Solids (1998) by : Roderic S. Lakes

Download or read book Viscoelastic Solids (1998) written by Roderic S. Lakes and published by CRC Press. This book was released on 2017-11-22 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Viscoelastic Solids covers the mathematical theory of viscoelasticity and physical insights, causal mechanisms, and practical applications. The book: presents a development of the theory, addressing both transient and dynamic aspects as well as emphasizing linear viscoelasticity synthesizes the structure of the theory with the aim of developing physical insight illustrates the methods for the solution of stress analysis problems in viscoelastic objects explores experimental methods for the characterization of viscoelastic materials describes the phenomenology of viscoelasticity in a variety of materials, including polymers, metals, high damping alloys, rock, piezoelectric materials, cellular solids, dense composite materials, and biological materials analyzes high damping and extremely low damping provides the theory of viscoelastic composite materials, including examples of various types of structure and the relationships between structure and mechanical properties contains examples on the use of viscoelastic materials in preventing and alleviating human suffering Viscoelastic Solids also demonstrates the use of viscoelasticity for diverse applications, such as earplugs, gaskets, computer disks, satellite stability, medical diagnosis, injury prevention, vibration abatement, tire performance, sports, spacecraft explosions, and music.

Discrete Element Method to Model 3D Continuous Materials

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Publisher : John Wiley & Sons
ISBN 13 : 111910291X
Total Pages : 198 pages
Book Rating : 4.1/5 (191 download)

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Book Synopsis Discrete Element Method to Model 3D Continuous Materials by : Mohamed Jebahi

Download or read book Discrete Element Method to Model 3D Continuous Materials written by Mohamed Jebahi and published by John Wiley & Sons. This book was released on 2015-02-26 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex behavior models (plasticity, cracks, visco elascticity) face some theoretical difficulties for the determination of the behavior law at the continuous scale. When homogenization fails to give the right behavior law, a solution is to simulate the material at a meso scale in order to simulate directly a set of discrete properties that are responsible of the macroscopic behavior. The discrete element model has been developed for granular material. The proposed set shows how this method is capable to solve the problem of complex behavior that are linked to discrete meso scale effects.

High Performance Concrete

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Publisher : CRC Press
ISBN 13 : 1351440896
Total Pages : 570 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis High Performance Concrete by : Y. Malier

Download or read book High Performance Concrete written by Y. Malier and published by CRC Press. This book was released on 2018-05-08 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a thorough review of properties, durability and use of high performance concrete, derived from recent research and experience. This book contains contributions from the leading French, Canadian and Swiss researchers, designers and material specialists, translated into English for the first time.

Symmetric Galerkin Boundary Element Method

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Publisher : Springer Science & Business Media
ISBN 13 : 3540687726
Total Pages : 276 pages
Book Rating : 4.5/5 (46 download)

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Book Synopsis Symmetric Galerkin Boundary Element Method by : Alok Sutradhar

Download or read book Symmetric Galerkin Boundary Element Method written by Alok Sutradhar and published by Springer Science & Business Media. This book was released on 2008-09-26 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Symmetric Galerkin Boundary Element Method presents an introduction as well as recent developments of this accurate, powerful, and versatile method. The formulation possesses the attractive feature of producing a symmetric coefficient matrix. In addition, the Galerkin approximation allows standard continuous elements to be used for evaluation of hypersingular integrals. FEATURES • Written in a form suitable for a graduate level textbook as well as a self-learning tutorial in the field. • Covers applications in two-dimensional and three-dimensional problems of potential theory and elasticity. Additional basic topics involve axisymmetry, multi-zone and interface formulations. More advanced topics include fluid flow (wave breaking over a sloping beach), non-homogeneous media, functionally graded materials (FGMs), anisotropic elasticity, error estimation, adaptivity, and fracture mechanics. • Presents integral equations as a basis for the formulation of general symmetric Galerkin boundary element methods and their corresponding numerical implementation. • Designed to convey effective unified procedures for the treatment of singular and hypersingular integrals that naturally arise in the method. Symbolic codes using Maple® for singular-type integrations are provided and discussed in detail. • The user-friendly adaptive computer code BEAN (Boundary Element ANalysis), fully written in Matlab®, is available as a companion to the text. The complete source code, including the graphical user-interface (GUI), can be downloaded from the web site http://www.ghpaulino.com/SGBEM_book. The source code can be used as the basis for building new applications, and should also function as an effective teaching tool. To facilitate the use of BEAN, a video tutorial and a library of practical examples are provided.

Applications of Potential Theory in Mechanics

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Publisher : Dordrecht ; Boston : Kluwer Academic Publishers
ISBN 13 :
Total Pages : 492 pages
Book Rating : 4.:/5 (43 download)

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Book Synopsis Applications of Potential Theory in Mechanics by : V. I. Fabrikant

Download or read book Applications of Potential Theory in Mechanics written by V. I. Fabrikant and published by Dordrecht ; Boston : Kluwer Academic Publishers. This book was released on 1989 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

3D Discrete Element Workbench for Highly Dynamic Thermo-mechanical Analysis

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Publisher : John Wiley & Sons
ISBN 13 : 1848217722
Total Pages : 212 pages
Book Rating : 4.8/5 (482 download)

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Book Synopsis 3D Discrete Element Workbench for Highly Dynamic Thermo-mechanical Analysis by : Damien Andre

Download or read book 3D Discrete Element Workbench for Highly Dynamic Thermo-mechanical Analysis written by Damien Andre and published by John Wiley & Sons. This book was released on 2015-10-26 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex behavior models (plasticity, cracks, visco elascticity) face some theoretical difficulties for the determination of the behavior law at the continuous scale. When homogenization fails to give the right behavior law, a solution is to simulate the material at a meso scale in order to simulate directly a set of discrete properties that are responsible of the macroscopic behavior. The discrete element model has been developed for granular material. The proposed set shows how this method is capable to solve the problem of complex behavior that are linked to discrete meso scale effects. The first book solves the local problem, the second one presents a coupling approach to link the structural effects to the local ones, this third book presents the software workbench that includes all the theoretical developments.

Beyond 2000 in Computational Geotechnics

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Publisher : Routledge
ISBN 13 : 1351464299
Total Pages : 336 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Beyond 2000 in Computational Geotechnics by : Ronald B.J. Brinkgreve

Download or read book Beyond 2000 in Computational Geotechnics written by Ronald B.J. Brinkgreve and published by Routledge. This book was released on 2019-01-22 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers presented during the first international PLAXIS symposium. Topics covered include: general geo-technical aspects; tunnels and deep excavations, and education and research. This pack is meant for the user of the PLAXIS program, as well as engineers and researchers.

Basic Concepts for Simple and Complex Liquids

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Publisher : Cambridge University Press
ISBN 13 : 9780521789530
Total Pages : 410 pages
Book Rating : 4.7/5 (895 download)

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Book Synopsis Basic Concepts for Simple and Complex Liquids by : Jean-Louis Barrat

Download or read book Basic Concepts for Simple and Complex Liquids written by Jean-Louis Barrat and published by Cambridge University Press. This book was released on 2003-03-27 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting a unified approach, this book focusses on the concepts and theoretical methods that are necessary for an understanding of the physics and chemistry of the fluid state. The authors do not attempt to cover the whole field in an encyclopedic manner. Instead, important ideas are presented in a concise and rigorous style, and illustrated with examples from both simple molecular liquids and more complex soft condensed matter systems such as polymers, colloids, and liquid crystals.

Acoustics of Porous Media

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Publisher : Editions TECHNIP
ISBN 13 : 9782710805168
Total Pages : 366 pages
Book Rating : 4.8/5 (51 download)

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Book Synopsis Acoustics of Porous Media by : Thierry Bourbié

Download or read book Acoustics of Porous Media written by Thierry Bourbié and published by Editions TECHNIP. This book was released on 1987 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Product Life-Cycle Management

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Publisher : John Wiley & Sons
ISBN 13 : 1118587529
Total Pages : 389 pages
Book Rating : 4.1/5 (185 download)

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Book Synopsis Product Life-Cycle Management by : Max Giordano

Download or read book Product Life-Cycle Management written by Max Giordano and published by John Wiley & Sons. This book was released on 2012-12-17 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a comprehensive view of the most recent major international research in the field of tolerancing, and is an excellent resource for anyone interested in Computer Aided Tolerating. It is organized into 4 parts. Part 1 focuses on the more general problems of tolerance analysis and synthesis, for tolerancing in mechanical design and manufacturing processes. Part 2 specifically highlights the simulation of assembly with defects, and the influence of tolerances on the quality of the assembly. Part 3 deals with measurement aspects, and quality control throughout the life cycle. Different measurement technologies and methods for estimating uncertainty are considered. In Part 4, different aspects of tolerancing and their interactions are explored, from the definition of functional requirement to measurement processes in a PLM approach.

Free-Radical Chemistry

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Publisher : CUP Archive
ISBN 13 : 9780521201490
Total Pages : 620 pages
Book Rating : 4.2/5 (14 download)

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Book Synopsis Free-Radical Chemistry by : D. C. Nonhebel

Download or read book Free-Radical Chemistry written by D. C. Nonhebel and published by CUP Archive. This book was released on 1974-01-31 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Dynamic Soil-structure Interaction

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Publisher : Prentice Hall
ISBN 13 :
Total Pages : 488 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Dynamic Soil-structure Interaction by : John P. Wolf

Download or read book Dynamic Soil-structure Interaction written by John P. Wolf and published by Prentice Hall. This book was released on 1985 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

FAIR

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Publisher : SIAM
ISBN 13 : 0898718848
Total Pages : 207 pages
Book Rating : 4.8/5 (987 download)

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Book Synopsis FAIR by : Jan Modersitzki

Download or read book FAIR written by Jan Modersitzki and published by SIAM. This book was released on 2009-01-01 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whenever images taken at different times, from different viewpoints, and/or by different sensors need to be compared, merged, or integrated, image registration is required. Registration, also known as alignment, fusion, or warping, is the process of transforming data into a common reference frame. This book provides an overview of state-of-the-art registration techniques from theory to practice, numerous exercises, and via a supplementary Web page, free access to FAIR.m, a package that is based on the MATLAB software environment.