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Author: Jean-Charles Craveur
Publisher: Dunod
ISBN: 2100849433
Category : Technology & Engineering
Languages : fr
Pages : 330
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Book Description
Discipline relativement récente mêlant étroitement mathématiques, mécanique et analyse numérique, le calcul de structures par éléments finis est une matière complexe. Cette quatrième édition répond aux difficultés que l'élève ingénieur et l'utilisateur de logiciels de CAO découvrent lors de l'utilisation de la méthode des éléments finis. Elle comporte quatre parties. La première est un rappel des notions de mécanique et de théorie des éléments finis. La deuxième est une présentation actualisée des différents types d'éléments finis avec pour chacun leurs avantages et leurs inconvénients. La troisième partie présente les pièges à éviter dans les modélisations (éléments incompatibles, matériaux composites...). Enfin la dernière partie est une étude des problèmes de dynamique linéaire : analyse modale et réponses transitoires et harmoniques. Des exemples, des exercices corrigés ainsi que des applications renforcent la dimension concrète de l'ouvrage et des problèmes types avec leurs solutions sont présentés en fin d'ouvrage.
Author: Jean-Charles Craveur
Publisher: Dunod
ISBN: 2100849433
Category : Technology & Engineering
Languages : fr
Pages : 330
Get Book Here
Book Description
Discipline relativement récente mêlant étroitement mathématiques, mécanique et analyse numérique, le calcul de structures par éléments finis est une matière complexe. Cette quatrième édition répond aux difficultés que l'élève ingénieur et l'utilisateur de logiciels de CAO découvrent lors de l'utilisation de la méthode des éléments finis. Elle comporte quatre parties. La première est un rappel des notions de mécanique et de théorie des éléments finis. La deuxième est une présentation actualisée des différents types d'éléments finis avec pour chacun leurs avantages et leurs inconvénients. La troisième partie présente les pièges à éviter dans les modélisations (éléments incompatibles, matériaux composites...). Enfin la dernière partie est une étude des problèmes de dynamique linéaire : analyse modale et réponses transitoires et harmoniques. Des exemples, des exercices corrigés ainsi que des applications renforcent la dimension concrète de l'ouvrage et des problèmes types avec leurs solutions sont présentés en fin d'ouvrage.
Author: Gérard Meunier
Publisher: John Wiley & Sons
ISBN: 0470393807
Category : Science
Languages : en
Pages : 618
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Book Description
Written by specialists of modeling in electromagnetism, this book provides a comprehensive review of the finite element method for low frequency applications. Fundamentals of the method as well as new advances in the field are described in detail. Chapters 1 to 4 present general 2D and 3D static and dynamic formulations by the use of scalar and vector unknowns and adapted interpolations for the fields (nodal, edge, face or volume). Chapter 5 is dedicated to the presentation of different macroscopic behavior laws of materials and their implementation in a finite element context: anisotropy and hysteretic properties for magnetic sheets, iron losses, non-linear permanent magnets and superconductors. More specific formulations are then proposed: the modeling of thin regions when finite elements become misfit (Chapter 6), infinite domains by using geometrical transformations (Chapter 7), the coupling of 2D and 3D formulations with circuit equations (Chapter 8), taking into account the movement, particularly in the presence of Eddy currents (Chapter 9) and an original approach for the treatment of geometrical symmetries when the sources are not symmetric (Chapter 10). Chapters 11 to 13 are devoted to coupled problems: magneto-thermal coupling for induction heating, magneto-mechanical coupling by introducing the notion of strong and weak coupling and magneto-hydrodynamical coupling focusing on electromagnetic instabilities in fluid conductors. Chapter 14 presents different meshing methods in the context of electromagnetism (presence of air) and introduces self-adaptive mesh refinement procedures. Optimization techniques are then covered in Chapter 15, with the adaptation of deterministic and probabilistic methods to the numerical finite element environment. Chapter 16 presents a variational approach of electromagnetism, showing how Maxwell equations are derived from thermodynamic principles.
Author: SAANOUNI Khemais
Publisher: Lavoisier
ISBN: 2746282259
Category :
Languages : en
Pages : 578
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Book Description
Cet ouvrage fait le point sur les méthodes actuelles les plus performantes pour modéliser, simuler et optimiser les procédés de mise en forme des structures minces et massives et d'en donner les tendances des nouvelles méthodes innovantes actuellement en cours de développement et qui feront à n'en pas douter les "outils" industriels de demain dans le domaine du formage virtuel. Par rapport aux ouvrages récents dédiés aux méthodes numériques en mise en forme, le principal apport de ce livre se trouve rassemblé au deuxième chapitre qui concerne le développement des modèles de comportement multiphysiques à fortes capacités prédictives, utilisables dans les codes de calcul des structures pour simuler et optimiser tous types de procédés de mise en forme par grandes déformations irréversibles de structures métalliques minces et/ou massives et leur "optimisation" vis-à-vis de l'avènement de l'endommagement ductile.
Author: A. J. Moses
Publisher: IOS Press
ISBN: 9789051992519
Category : Computers
Languages : en
Pages : 986
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Book Description
The book covers classical and practical approaches to electromagnetic field solutions in magnetic devices. The following topics are addressed: Advanced computional techniques; Intelligent computer aided design; Magnetic materials; Inverse problems; Magnetic sensors and transducers; Performance and optimisation of devices; Applications to electronic systems; Modelling of non-linear systems and other related topics. This volume presents 200 of the best articles presented at the International Symposium on Non-Linear Electromagnetic Systems (ISEM in Cardiff, Wales). The previous ISEM papers were published in the successful volume Advanced Computational and Design Techniques in Applied Electromagnetic Systems (by Elsevier).Main chapters in this book are: Electromagnetic Devices: Non-linearities at contacts and interfaces in semiconductor structures by R.H. Williams as key-note. Optimisation, Inverse and Biological Studies: Power loss testing; intelligent computation of optimization of metal cutting; grid methods for CFD and CEM. Magnetic Materials: Materials for circuit semilator applications; rotational magnetostriction. Computational Techniques and Modelling: Electromagnetic device design; soft magnetic materials; engineering application of artificial intelligence. Sensors and Non-destructive Testing: Eddy current nondestructive evaluation; nonlinear magnetoresistance; micro magnetic sensor. Electronic and Electrical Applications: Non-linear transistor parameters; superconducting magnets.
Author: John Wainwright
Publisher: John Wiley & Sons
ISBN: 0470091541
Category : Science
Languages : en
Pages : 432
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Book Description
Simulation models are increasingly used to investigate processes and solve practical problems in a wide variety of disciplines eg. climatology, ecology, hydrology, geomorphology, engineering. Environmental Modelling: A Practical Approach addresses the development, testing and application of such models, which apply across traditional boundaries, and demonstrate how interactions across these boundaries can be beneficial. Provides a general overview of methods and approaches as well as focusing on key subject areas written by leading practitioners in the field Assesses the advantages and disadvantages of different models used and provides case studies supported with data, output, tutorial exercises and links to the model and/or model applications via the book's website Covers major developments in the field, eg. the use of GIS and remote sensing techniques, and scaling issues As associated website contains colour images, as well as links to www resources
Author: Noureddine Atalla
Publisher: CRC Press
ISBN: 1466592885
Category : Technology & Engineering
Languages : en
Pages : 466
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Book Description
Effectively Construct Integral Formulations Suitable for Numerical ImplementationFinite Element and Boundary Methods in Structural Acoustics and Vibration provides a unique and in-depth presentation of the finite element method (FEM) and the boundary element method (BEM) in structural acoustics and vibrations. It illustrates the principles using a
Author: Philippe Mestat
Publisher: Presses des Ponts
ISBN: 9782859783624
Category :
Languages : en
Pages : 1112
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Book Description
Author: S. Selberherr
Publisher: Springer Science & Business Media
ISBN: 3709187524
Category : Technology & Engineering
Languages : en
Pages : 308
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Book Description
The invention of semiconductor devices is a fairly recent one, considering classical time scales in human life. The bipolar transistor was announced in 1947, and the MOS transistor, in a practically usable manner, was demonstrated in 1960. From these beginnings the semiconductor device field has grown rapidly. The first integrated circuits, which contained just a few devices, became commercially available in the early 1960s. Immediately thereafter an evolution has taken place so that today, less than 25 years later, the manufacture of integrated circuits with over 400.000 devices per single chip is possible. Coincident with the growth in semiconductor device development, the literature concerning semiconductor device and technology issues has literally exploded. In the last decade about 50.000 papers have been published on these subjects. The advent of so called Very-Large-Scale-Integration (VLSI) has certainly revealed the need for a better understanding of basic device behavior. The miniaturization of the single transistor, which is the major prerequisite for VLSI, nearly led to a breakdown of the classical models of semiconductor devices.
Author: Javad Fouladgar
Publisher: John Wiley & Sons
ISBN: 1118563085
Category : Technology & Engineering
Languages : en
Pages : 255
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Book Description
This book concerns the analysis and design of induction heating of poor electrical conduction materials. Some innovating applications such as inductive plasma installation or transformers, thermo inductive non-destructive testing and carbon-reinforced composite materials heating are studied. Analytical, semi-analytical and numerical models are combined to obtain the best modeling technique for each case. Each model has been tested with experimental results and validated. The principal aspects of a computational package to solve these kinds of coupled problems are described. In the first chapter, the mathematical tools for coupled electromagnetic and thermal phenomena are introduced. In Chapter 2, these tools are used to analyze a radio frequency inductive plasma installation. The third chapter describes the methodology of designing a low frequency plasma transformer. Chapter 4 studies the feasibility of the thermo inductive technique for non-destructive testing and the final chapter is dedicated to the use of induction heating in the lifecycle of carbon-reinforced composite materials. Contents 1. Thermal and Electromagnetic Coupling, Javad Fouladgar, Didier Trichet and Brahim Ramdane. 2. Simplified Model of a Radiofrequency Inductive Thermal Plasma Installation, Javad Fouladgar and Jean-Pierre Ploteau. 3. Design Methodology of A Very Low-Frequency Plasma Transformer, Javad Fouladgar and Souri Mohamed Mimoune. 4. Non Destructive Testing by Thermo-Inductive Method, Javad Fouladgar, Brahim Ramdane, Didier Trichet and Tayeb Saidi. 5. Induction Heating of Composite Materials, Javad Fouladgar, Didier Trichet, Samir Bensaid and Guillaume Wasselynck
Author: M. Predeleanu
Publisher: Elsevier
ISBN: 0080544886
Category : Technology & Engineering
Languages : en
Pages : 445
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Book Description
The technological field of defects, and more appropriately, avoidance of them, is very current in perhaps all sectors of the manufacturing industry. This is particularly important to reduce/minimize waste everywhere to address lean production procedures. The recent advances in finite plasticity and visioplasticity, damage modelling, instability theories, fracture modelling, computer numerical techniques and process simulation etc. offer new approaches and tools for defect prediction, analyses and guidelines for designing components to be manufactured by traditional and emerging process technologies.This volume contains contributions from well known researchers and experts in the field presenting an up-to-date overview of advances in this area. Subjects covered include: micro- and macro-scale observation of defects; localization and instability analysis; damage modelling and fracture criteria; defect prediction methods; design considerations to avoid defects.
