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Magnetic Materials And 3d Finite Element Modeling

Author: João Pedro A. Bastos
Publisher: CRC Press
ISBN: 1466592524
Size: 19.51 MB
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Magnetic Materials and 3D Finite Element Modeling explores material characterization and finite element modeling (FEM) applications. This book relates to electromagnetic analysis based on Maxwell’s equations and application of the finite element (FE) method to low frequency devices. A great source for senior undergraduate and graduate students in electromagnetics, it also supports industry professionals working in magnetics, electromagnetics, ferromagnetic materials science and electrical engineering. The authors present current concepts on ferromagnetic material characterizations and losses. They provide introductory material; highlight basic electromagnetics, present experimental and numerical modeling related to losses and focus on FEM applied to 3D applications. They also explain various formulations, and discuss numerical codes. • Furnishes algorithms in computational language • Summarizes concepts related to the FE method • Uses classical algebra to present the method, making it easily accessible to engineers Written in an easy-to-understand tutorial format, the text begins with a short presentation of Maxwell’s equations, discusses the generation mechanism of iron losses, and introduces their static and dynamic components. It then demonstrates simplified models for the hysteresis phenomena under alternating magnetic fields. The book also focuses on the Preisach and Jiles–Atherton models, discusses vector hysterisis modeling, introduces the FE technique, and presents nodal and edge elements applied to 3D FE formulation connected to the hysteretic phenomena. The book discusses the concept of source-field for magnetostatic cases, magnetodynamic fields, eddy currents, and anisotropy. It also explores the need for more sophisticated coding, and presents techniques for solving linear systems generated by the FE cases while considering advantages and drawbacks.

Characterisation Of Soft Magnetic Materials Under Rotational Magnetisation

Author: Stanislaw Zurek
Publisher: CRC Press
ISBN: 1351397087
Size: 55.19 MB
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The book presents practical aspects related to the measurement of rotational power loss in soft magnetic materials. The book furthermore focuses on practical aspects of performing such measurements, the associated difficulties as well as solutions to the most common problems. Numerous practical aspects, hands-on experience, and most commonly encountered pitfalls are heavily discussed in the book. The text begins with introduction to magnetism, then follows with definitions of measurement methods of rotational power loss from physical viewpoint. Two chapters describe and detail the various sensors which can be employed for such measurements as well as all the aspects of designing, making, and using a magnetising apparatus. A synthesis of the likely optimal design of a magnetising apparatus is also given, preceded with the full reasoning based on all the research carried out to date. Characterisation of Soft Magnetic Materials Under Rotational Magnetisation serves as an excellent starting point for any student having to perform magnetic measurements under rotational magnetisation, but also under 1D, 2D or 3D excitation. Because the methods, sensors, and apparatus are extensively discussed it will also be a great reference for more senior researchers and experts in the field. There is a whole chapter devoted to analysis of measurement uncertainty. This subject is rarely published for magnetic measurements, which makes it more difficult for all researchers to understand the concepts and methodology used in uncertainty estimation. This chapter not only introduces the whole subject, but also provides multiple step-by-step examples which can be easily followed, from very simple cases to much more complex ones. All equations are presented with full SI units which greatly helps in practical application of the presented methodology. Each chapter is written in such a way that it can be studied on its own, so that the reader can focus only on the specific aspects, as required.

Computational Electromagnetics With Matlab Fourth Edition

Author: Matthew N.O. Sadiku
Publisher: CRC Press
ISBN: 1351365088
Size: 43.12 MB
Format: PDF, Mobi
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This fourth edition of the text reflects the continuing increase in awareness and use of computational electromagnetics and incorporates advances and refinements made in recent years. Most notable among these are the improvements made to the standard algorithm for the finite-difference time-domain (FDTD) method and treatment of absorbing boundary conditions in FDTD, finite element, and transmission-line-matrix methods. It teaches the readers how to pose, numerically analyze, and solve EM problems, to give them the ability to expand their problem-solving skills using a variety of methods, and to prepare them for research in electromagnetism.

Sabiston And Spencer S Surgery Of The Chest E Book

Author: Frank Sellke
Publisher: Elsevier Health Sciences
ISBN: 1455700096
Size: 32.79 MB
Format: PDF
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Through seven successful editions, Sabiston & Spencer Surgery of the Chest has set the standard in cardiothoracic surgery references. Now, the new 8th Edition, edited by Frank W. Sellke, MD, Pedro J. del Nido, MD, and Scott J. Swanson, MD, carries on this tradition with updated coverage of today's essential clinical knowledge from leaders worldwide. Guidance divided into three major sections—Adult Cardiac Surgery, Congenital Heart Surgery, and Thoracic Surgery—lets you quickly find what you need, while new and revised chapters reflect all of the important changes within this rapidly evolving specialty. Expert Consult functionality—new to this edition—enables you to access the complete contents of the 2-volume set from anyplace with an Internet connection for convenient consultation where and when you need it. This is an ideal source for mastering all of the most important current knowledge and techniques in cardiac and thoracic surgery—whether for specialty board review or day-to-day practice. Features short, focused chapters that help you find exactly what you need. Presents the work of international contributors who offer a global view of the entire specialty. Covers thoracic surgery as well as adult and pediatric cardiac surgery for a practical and powerful single source. Includes nearly 1,100 illustrations that help to clarify key concepts. Features online access to the complete contents of the 2-volume text at expertconsult.com for convenient anytime, anywhere reference. Covers the hottest topics shaping today's practice, including the latest theory and surgical techniques for mitral valve disease, advances in the treatment of congenital heart disease, minimally invasive surgical approaches to the treatment of adult and congenital cardiac disease and thoracic disease, stent grafting for aortic disease, and cell-based therapies. Your purchase entitles you to access the web site until the next edition is published, or until the current edition is no longer offered for sale by Elsevier, whichever occurs first. Elsevier reserves the right to offer a suitable replacement product (such as a downloadable or CD-ROM-based electronic version) should access to the web site be discontinued.

Electromagnetic Nondestructive Evaluation Xvi

Author: J.M.A. Rebello
Publisher: IOS Press
ISBN: 1614993548
Size: 59.10 MB
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Electromagnetic Nondestructive Evaluation (ENDE) is the process of inducing electric currents, magnetic fields or both within a test object to assess its condition by observing the electromagnetic response. An important tool in fields as diverse as engineering, medicine and art, it does not permanently alter the object being tested, thus proving invaluable for product evaluation, troubleshooting and research. This book presents the proceedings of the 17th International Workshop on Electromagnetic Nondestructive Evaluation (ENDE), held in Rio de Janeiro, Brazil, in July 2012. ENDE workshop is an important event for all scientists with interests in non-destructive testing. The first workshop took place in 1995 in London UK, and has been followed by workshops held in various parts of the world, but this is the first time this workshop series has come to a Latin American country. The workshops bring together scientists and engineers active in research, development and industrial applications of ENDE. The book is divided into five sections: advanced sensors; analytical and numerical modeling; systems and techniques for electromagnetic NDE; characterization of materials and NDE of cracks; and new developments and others. Each section includes papers on a variety of subjects. From the papers submitted for publication, thirty six peer reviewed articles have been accepted, six of which emanate from Latin American authors. The book will be of interest to all those wishing to keep abreast of developments in the field, or who rely on the advanced techniques based on electromagnetic principles applied to nondestructive evaluation in their work.

Biomedical Simulation

Author: Fernando Bello
Publisher: Springer Science & Business Media
ISBN: 3540705201
Size: 13.11 MB
Format: PDF, ePub, Docs
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This book constitutes the refereed proceedings of the 4th International Symposium on Biomedical Simulation, ISBMS 2008, held in London, UK, in July 2008. The 19 revised full papers and 7 poster papers presented were carefully reviewed and selected from numerous submissions. The papers are organized in four different sections corresponding to key areas and techniques of this constantly expanding field: finite element modeling, mass spring and statistical shape modeling, motion and fluid modeling and implementation issues. An additional section covers the posters presented at the meeting.

Magnetic Information Storage Technology

Author: Shan X. Wang
Publisher: Elsevier
ISBN: 9780080510613
Size: 66.47 MB
Format: PDF, Kindle
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This text explains how hard disk drives operate, how billions of bytes of digital information are stored and accessed, and where the technology is going. In particular, the book emphasizes the most fundamental principles of magnetic information storage, including in-depth knowledge of both magnetics and signal processing methods. Magnetic Information Storage Technology contains many graphic illustrations and an introduction of alternative storage technologies, such as optic disk recording, holographic recording, semiconductor flash memory, and magnetic random access memory. Provides the fundamentals of magnetic information storage and contrasts it with a comparison of alternative storage technologies Addresses the subject at the materials, device and system levels Addresses the needs of the multi-billion-dollar-a year magnetic recording and information storage industry Emphasizes both theoretical and experimental concepts Condenses current knowledge on magnetic information storage technology into one self-contained volume Suitable for undergraduate and graduate students, as well as seasoned researchers, engineers and professionals in data and information storage fields