Fundamentals of Ultrasonic Phased Arrays

Author: Lester W. Schmerr Jr.
Publisher: Springer
ISBN: 3319072722
Format: PDF
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This book describes in detail the physical and mathematical foundations of ultrasonic phased array measurements. The book uses linear systems theory to develop a comprehensive model of the signals and images that can be formed with phased arrays. Engineers working in the field of ultrasonic nondestructive evaluation (NDE) will find in this approach a wealth of information on how to design, optimize and interpret ultrasonic inspections with phased arrays. The fundamentals and models described in the book will also be of significant interest to other fields, including the medical ultrasound and seismology communities. A unique feature of this book is that it presents a unified theory of imaging with phased arrays that shows how common imaging methods such as the synthetic aperture focusing technique (SAFT), the total focusing method (TFM), and the physical optics far field inverse scattering (POFFIS) imaging method are all simplified versions of more fundamental and quantitative imaging approaches, called imaging measurement models. To enhance learning, this book first describes the fundamentals of phased array systems using 2-D models, so that the complex 3-D cases normally found in practice can be more easily understood. In addition to giving a detailed discussion of phased array systems, Fundamentals of Ultrasonic Phased Arrays also provides MATLAB® functions and scripts, allowing the reader to conduct simulations of ultrasonic phased array transducers and phased array systems with the latest modeling technology.

Engineering Dynamics 2 0

Author: Lester W. Schmerr
Publisher: Springer
ISBN: 9783319984698
Format: PDF, ePub
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This book presents a new approach to learning the dynamics of particles and rigid bodies at an intermediate to advanced level. There are three distinguishing features of this approach. First, the primary emphasis is to obtain the equations of motion of dynamical systems and to solve them numerically. As a consequence, most of the analytical exercises and homework found in traditional dynamics texts written at this level are replaced by MATLAB®-based simulations. Second, extensive use is made of matrices. Matrices are essential to define the important role that constraints have on the behavior of dynamical systems. Matrices are also key elements in many of the software tools that engineers use to solve more complex and practical dynamics problems, such as in the multi-body codes used for analyzing mechanical, aerospace, and biomechanics systems. The third and feature is the use of a combination of Newton-Euler and Lagrangian (analytical mechanics) treatments for solving dynamics problems. Rather than discussing these two treatments separately, Engineering Dynamics 2.0 uses a geometrical approach that ties these two treatments together, leading to a more transparent description of difficult concepts such as "virtual" displacements. Some important highlights of the book include: Extensive discussion of the role of constraints in formulating and solving dynamics problems. Implementation of a highly unified approach to dynamics in a simple context suitable for a second-level course. Descriptions of non-linear phenomena such as parametric resonances and chaotic behavior. A treatment of both dynamic and static stability. Overviews of the numerical methods (ordinary differential equation solvers, Newton-Raphson method) needed to solve dynamics problems. An introduction to the dynamics of deformable bodies and the use of finite difference and finite element methods. Engineering Dynamics 2.0 provides a unique, modern treatment of dynamics problems that is directly useful in advanced engineering applications. It is a valuable resource for undergraduate and graduate students and for practicing engineers.

Research Trends in Solid Mechanics

Author: George J. Dvorak
Publisher: Pergamon Press
ISBN: 9780080435725
Format: PDF, ePub, Docs
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Hardbound. Solid mechanics is a basic scientific discipline which provides the theoretical foundation, experimental support, solution methodology and computational tools for analysis, design, construction, manufacture, and behavior prediction in service of many devices, machines, materials, structures and large complex systems that are essential to the existence and progress of an advanced civilization. It is concerned with both manmade, natural and living solid objects, and with all aspects of their physical behavior that affect their function, integrity or service life expectancy.The contents of this volume offer examples of some of the activities that are currently at the forefront of solid mechanics research, and also illustrate the vast reach of the discipline and of its interactions with other science and engineering endeavors.

Finite Elemente Methoden

Author: Klaus-Jürgen Bathe
Publisher: DrMaster Publications
ISBN: 9783540668060
Format: PDF, ePub
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Dieses Lehr- und Handbuch behandelt sowohl die elementaren Konzepte als auch die fortgeschrittenen und zukunftsweisenden linearen und nichtlinearen FE-Methoden in Statik, Dynamik, Festkörper- und Fluidmechanik. Es wird sowohl der physikalische als auch der mathematische Hintergrund der Prozeduren ausführlich und verständlich beschrieben. Das Werk enthält eine Vielzahl von ausgearbeiteten Beispielen, Rechnerübungen und Programmlisten. Als Übersetzung eines erfolgreichen amerikanischen Lehrbuchs hat es sich in zwei Auflagen auch bei den deutschsprachigen Ingenieuren etabliert. Die umfangreichen Änderungen gegenüber der Vorauflage innerhalb aller Kapitel - vor allem aber der fortgeschrittenen - spiegeln die rasche Entwicklung innerhalb des letzten Jahrzehnts auf diesem Gebiet wieder. TOC:Eine Einführung in den Gebrauch von Finite-Elemente-Verfahren.-Vektoren, Matrizen und Tensoren.-Einige Grundbegriffe ingenieurwissenschaftlicher Berechnungen.-Formulierung der Methode der finiten Elemente.-Formulierung und Berechnung von isoparametrischen Finite-Elemente-Matrizen.-Nichtlineare Finite-Elemente-Berechnungen in der Festkörper- und Strukturmechanik.-Finite-Elemente-Berechnungen von Wärmeübertragungs- und Feldproblemen.-Lösung von Gleichgewichtsbeziehungen in statischen Berechnungen.-Lösung von Bewegungsgleichungen in kinetischen Berechnungen.-Vorbemerkungen zur Lösung von Eigenproblemen.-Lösungsverfahren für Eigenprobleme.-Implementierung der Finite-Elemente-Methode.

Moderne Physik

Author: Paul Allen Tipler
Publisher: Oldenbourg Verlag
ISBN: 9783486582758
Format: PDF, ePub, Docs
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Immer mehr deutsche Hochschulen folgen dem amerikanischen Vorbild und bieten Einführungskurse zur Modernen Physik an. Diese Kurse vermitteln die spannenden Erkenntnisse der Physik der letzten 100 Jahre, die zu bahnbrechenden Veränderungen geführt haben. Das Standardwerk zu diesen Kursen ist "Modern Physics" von Paul A. Tipler, Autor des berühmten Werkes "Physik", und Ralph A. Llewellyn. Die Autoren zeigen, dass man ein tief gehendes Verständnis der Modernen Physik vermitteln kann, ohne einen schwerfälligen mathematischen Apparat bemühen zu müssen. Mit über 500 Abbildungen, Zitaten berühmter Physiker sowie mit ca. 700 sorgfältig ausgewählten Übungsaufgaben und über das Internet zugänglichen Ergänzungen wurde "Modern Physics" in den USA zu einem der beliebtesten Lehrbücher zu diesem Thema.

Quality Technology Handbook

Author: R S Sharpe
Publisher: Butterworth-Heinemann
ISBN: 148316408X
Format: PDF, ePub, Docs
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Quality Technology Handbook, Fourth Edition offers a wide discussion on technology and its related subtopics. After giving some information on its background, content, and authors, the book then informs the readers about the quality problem check-list and enumerates the questions one has to ask to ensure that a problem will be solved. This part is followed by a discussion on non-destructive testing (NDT) and the several committees formed for it, among which are the British National Committee and the Harwell NDT Center. The book also includes information on two organizations that are closely related to the topic, the Institute of Quality Assurance (IQA) and The Welding Institute (TWI). A directory of international organizations related to quality assurance and non-destructive testing is provided in the latter part of the text. The book serves as valuable reference to undergraduates or postgraduates of courses that are related to science and technology.