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Books > Professional & Technical > Mechanical engineering & materials > Mechanical engineering
This book describes the solution of contact problems with an emphasis on idealized (mainly linear) elastic problems that can be treated with elementary analytical methods. General physical and mathematical features of these solutions are highlighted. Topics covered include the contact of rough surfaces and problems involving adhesive (e.g. van der Waals) forces. The author is a well-known researcher in the subject with hands-on experience of the topics covered and a reputation for lucid explanations. The target readership for the book includes researchers who encounter contact problems but whose primary focus is not contact mechanics. Coverage is also suitable for a graduate course in contact mechanics and end-of-chapter problems are included.
Compliant mechanisms and actuators are growing in importance due to their benefits in robotics, medical technology, sensor applications, or in handling compressible objects. This book helps to understand the mechanical behavior of compliant systems. Suggested classifications and different modeling methods are shown that allow for the description of compliant systems.
Among all the fields in solid mechanics the methodologies associated to multibody dynamics are probably those that provide a better framework to aggregate different disciplines. This idea is clearly reflected in the multidisciplinary applications in biomechanics that use multibody dynamics to describe the motion of the biological entities, or in finite elements where the multibody dynamics provides powerful tools to describe large motion and kinematic restrictions between system components, or in system control for which multibody dynamics are the prime form of describing the systems under analysis, or even in applications with fluid-structures interaction or aeroelasticity. This book contains revised and enlarged versions of selected communications presented at the ECCOMAS Thematic Conference in Multibody Dynamics 2003 that took place in Lisbon, Portugal, which have been enhanced in their self-containment and tutorial aspects by the authors. The result is a comprehensive text that constitutes a valuable reference for researchers and design engineers and helps to appraise the potential of application of multibody dynamics to a wide range of scientific and engineering areas of relevance.
This book presents the latest information on the intelligent CNC machine tool spindle system, which integrates various disciplines such as mechanical engineering, control engineering, computer science and information technology. It describes a prediction method and model for temperature rise and thermal deformation in motorized spindles and proposes an intelligent stator resistance identification method to reduce the torque ripple of motorized spindles under direct torque control. Further, it discusses the on-line dynamic balance method for NC machine tool spindles. The biogeographic optimization algorithm and hybrid intelligent algorithm presented here were first applied in the field of motorized spindle performance control. In turn, the book presents extensive motorized spindle performance test data and includes detailed examples of how intelligent algorithms can be applied to motor spindle stator resistance identification, temperature field prediction and on-line dynamic balance. In summary, the book provides readers with the latest tools for designing, testing and implementing intelligent motorized spindle systems in terms of the basic theory, technological applications and future prospects, and offers a wealth of practical information for researchers in mechanical engineering, especially in the area of control systems.
Machine tools are the main production factor for many industrial applications, in important sectors such as the automotive and aeronautical industry, precision parts, human implants, and mechanical construction. Recent developments in new motion devices and numerical control have lead to considerable technological improvements in machine tools. The use of five-axis machining centres has also spread, resulting in reductions in set-up and lead times. As a consequence, feed rates, cutting speed and chip section increased, whilst accuracy and precision have improved as well. Additionally, new cutting tools have been developed, combining tough substrates, optimal geometries and wear resistant coatings. Today s machines and machining processes are clearly very different to those of the past. Machine Tools for High Performance Machining describes in depth several aspects of machine structures, machine elements and control, and application. The basics, models and functions of each aspect are explained by experts from both academia and industry. Postgraduates, researchers and end users will all find this book an essential reference.
In this monograph, an accurate ultrasonic method for measurement of small motion and deformation of biological tissue is described. In the displacement estimation based on the phase change of echoes, the displacement estimates are biased when the center frequency of the RF echo changes. Such an apparent change in the center frequency could be caused by the interference of echoes from scatterers. To reduce the influence of the center frequency variation on the estimation of motion and deformation, an error correcting function, which does not require the assumption that the center frequency distributions in 2 different frames are the same, was introduced. As a result, the proposed method provides better strain estimates in comparison with conventional phase-sensitive correlation methods. This monograph also shows examples of applications of this method to measurement of small motion and deformation of biological tissues. This method can be applied to measurement of elasticity of dynamic tissues, such as the artery. Also, elastic properties of static tissues can be also measured by combining with actuation using the acoustic radiation force.
This collection of all of Stan Shiels articles for World Pumps
covers specification, operational issues, troubleshooting and the
well-known PumpAcademy articles which covered specific topics of
importance to pump engineers. The result is a volume which is
enjoyable and instructive to read, containing facts and opinions as
fresh as the day they were written.
This book is the first graduate-level textbook presenting a comprehensive treatment of Data Converters. It provides comprehensive definition of the parameters used to specify data converters, and covers all the architectures used in Nyquist-rate data converters. The book uses Simulink and Matlab extensively in examples and problem sets. This is a textbook that is also essential for engineering professionals as it was written in response to a shortage of organically organized material on the topic. The book assumes a solid background in analog and digital circuits as well as a working knowledge of simulation tools for circuit and behavioral analysis.
The ECCOMAS Thematic Conference "Multibody Dynamics 2009" was held in Warsaw, representing the fourth edition of a series which began in Lisbon (2003), and was then continued in Madrid (2005) and Milan (2007), held under the auspices of the European Community on Computational Methods in Applied Sciences (ECCOMAS). The conference provided a forum for exchanging ideas and results of several topics related to computational methods and applications in multibody dynamics, through the participation of 219 scientists from 27 countries, mostly from Europe but also from America and Asia. This book contains the revised and extended versions of invited conference papers, reporting on the state-of-the-art in the advances of computational multibody models, from the theoretical developments to practical engineering applications. By providing a helpful overview of the most active areas and the recent efforts of many prominent research groups in the field of multibody dynamics, this book can be highly valuable for both experienced researches who want to keep updated with the latest developments in this field and researches approaching the field for the first time.
"Surface Integrity in Machining" describes the fundamentals and recent advances in the study of surface integrity in machining processes. "Surface Integrity in Machining" gathers together research from international experts in the field. Topics covered include: the definition of surface integrity and its importance in functional performance; surface topography characterization and evaluation; microstructure modification and the mechanical properties of subsurface layers; residual stresses; surface integrity characterization methods; and surface integrity aspects in machining processes. A useful reference for researchers in tribology and materials, mechanical and materials engineers, and machining professionals, "Surface Integrity in Machining" can be also used as a textbook by advanced undergraduate and postgraduate students.
This book examines pedestrian shoe-floor slip resistance from an engineering standpoint in order to better understand friction and wear behavior. This analysis includes an extensive investigation into the surface properties of shoes and flow, and the measurement of dynamic friction and other mechanical and physical aspects of shoe-floor tribology. Lastly, the book proposes a measurement concept for the identification and classification of operational floor surfaces under a range of different conditions. Novel techniques and methods are proposed that can improve the reliability of slip resistance assessments. The current state of knowledge is critically examined and discussed from a tribological perspective, including aspects like friction, wear, lubrication and the mechanical behavior of shoes, floors and their wider environment. Further, the book reports on extensive experimental investigations into the topographical characteristics of shoe and floor surfaces and how they affect slip resistance. Slips resulting in pedestrian falls are a major cause of injuries and deaths for all age groups. This important book provides essential insights for researchers, practicing engineers and public safety officials wishing to learn about how the risk of pedestrian slips can be assessed and understood.
This unique reference represents a cross-section of forefront robotics research, ranging from robotics and systems to learning, autonomy and failure detection, from vision and navigation to localization and mapping, which are based on the papers presented at the 1st European Robotics Symposium (EUROS-06) held in Palermo, Italy from 16-18 March, 2006. The European Robotics Symposium (EUROS) is a brand-new International scientific event promoted by EURON, the European Robotics Network.
This book has evolved from the passionate desire of the authors in using the modern concepts of multibody dynamics for the design improvement of the machineries used in the rural sectors of India and The World. In this connection, the first author took up his doctoral research in 2003 whose findings have resulted in this book. It is expected that such developments will lead to a new research direction MuDRA, an acronym given by the authors to "Multibody Dynamics for Rural Applications. " The way Mu- DRA is pronounced it means 'money' in many Indian languages. It is hoped that practicing MuDRA will save or generate money for the rural people either by saving energy consumption of their machines or making their products cheaper to manufacture, hence, generating more money for their livelihood. In this book, the initial focus was to improve the dynamic behavior of carpet scrapping machines used to wash newly woven hand-knotted c- pets of India. However, the concepts and methodologies presented in the book are equally applicable to non-rural machineries, be they robots or - tomobiles or something else. The dynamic modeling used in this book to compute the inertia-induced and constraint forces for the carpet scrapping machine is based on the concept of the decoupled natural orthogonal c- plement (DeNOC) matrices. The concept is originally proposed by the second author for the dynamics modeling and simulation of serial and - rallel-type multibody systems, e. g.
1. Background This textbook is an introduction to and exploration of a number of core topics in the ?eld of applied mechanics. Mechanics, in both its theoretical and applied contexts, is, like all scienti?c endeavors, a human construct. It re?ects the personalities, thoughts, errors, and successes of its creators. We therefore provide some personal information about each of these individuals when their names arise for the ?rst time in this book. This should enable the reader to piece together a cultural-historical picture of the ?eld s origins and development. This does not mean that we are writing history. Nevertheless, some remarks putting individuals and ideas in context are necessary in order to make clear what we are speaking about - and what we are not speaking about. At the end of the 19th century, technical universities were established eve- where in Europe in an almost euphoric manner. But the practice of technical mechanics itself, as one of the basics of technical development, was in a desolate state, due largely to the refusal of its practitioners to recognize the in?uence of kinetics on motion. They were correct to the extend that then current mechanical systems moved with small velocities where kinetics does not play a signi?cant role. But they had failed to keep up with developments in the science underlying their craft and were unable to keep pace with the speeds of such systems as the steam engine.
Stress and strain analysis of rotors subjected to surface and body
loads, as well as to thermal loads deriving from temperature
variation along the radius, constitutes a classic subject of
machine design. Nevertheless attention is limited to rotor profiles
for which governing equations are solvable in closed form.
Furthermore very few actual engineering issues may relate to
structures for which stress and strain analysis in the linear
elastic field and, even more, under non-linear conditions (i.e.
plastic or viscoelastic conditions) produces equations to be solved
in closed form. Moreover, when a product is still in its design
stage, an analytical formulation with closed-form solution is of
course simpler and more versatile than numerical methods, and it
allows to quickly define a general configuration, which may then be
fine-tuned using such numerical methods.
Weingart's classic book on fireworks covering the author's work and experiments from 1890-1935. In case laminate hardback edition.
Nanotribology: Critical Assessment and Research Needs is an excellent reference for both academic and industrial researchers working in the fields of nanotechnology, tribology, mechanical engineering, materials science and engineering, MEMS, NEMS, magnetic recording, and biomedical devices. It will also be of interest to those pursuing scanning probe microscopy, nanoimaging, mesomanufacturing, sensors, actuators, aerospace, defense (controllers, microsystems), and military systems. Nanotribology: Critical Assessment and Research Needs provides a critical assessment of the current state of the art of nanotribology within the context of MEMS, mesomanufacturing, nanotechnology and microsystems. It contains chapters written by the leading experts in these fields. It identifies gaps in current knowledge and barriers to applications, and recommends research areas that need to be addressed to enable the rapid development of technologies.
This books contains the Proceedings of the 4th International Conference on Power Transmissions, that was held in Sinaia, Romania from June 20 -23, 2012. Power Transmissions is a very complex and multi-disciplinary scientific field of Mechanical Engineering that covers the different types of transmissions (mechanical, hydraulic, pneumatic) as well as all the machine elements involved, such as gears, bearings, shafts, couplings and a lot more. It concerns not only their basic theory but also their design, analysis, testing, application and maintenance. The requirements set to modern power transmissions are really tough to meet: They need to be more efficient, stronger, smaller, noiseless, easier to produce and to cost less. There is a strong demand to become easier in operation and maintenance, or even automatic and in maintenance-free. Last but not least, they should be easily recycled and respect the environment. Joint efforts of specialists from both academia and industry can significantly contribute to fulfill these needs. The main goal of this conference was to bring together experts from all over the world and present the latest developments in the field of Power Transmissions.
Huge earthquakes and tsunamis have caused serious damage to important structures such as civil infrastructure elements, buildings and power plants around the globe. To quantitatively evaluate such damage processes and to design effective prevention and mitigation measures, the latest high-performance computational mechanics technologies, which include telascale to petascale computers, can offer powerful tools. The phenomena covered in this book include seismic wave propagation in the crust and soil, seismic response of infrastructure elements such as tunnels considering soil-structure interactions, seismic response of high-rise buildings, seismic response of nuclear power plants, tsunami run-up over coastal towns and tsunami inundation considering fluid-structure interactions. The book provides all necessary information for addressing these phenomena, ranging from the fundamentals of high-performance computing for finite element methods, key algorithms of accurate dynamic structural analysis, fluid flows with free surfaces, and fluid-structure interactions, to practical applications with detailed simulation results. The book will offer essential insights for researchers and engineers working in the field of computational seismic/tsunami engineering.
This book summarizes the theoretical and experimental studies confirming the concept of the liquid-crystalline nature of boundary lubrication in synovial joints. It is shown that cholesteric liquid crystals in the synovial liquid play a significant role in the mechanism of intra-articular friction reduction. The results of structural, rheological and tribological research of the creation of artificial synovial liquids containing cholesteric liquid crystals in natural synovial liquids are described. These liquid crystals reproduce the lubrication properties of natural synovia and provide a high chondroprotective efficiency. They were tested in osteoarthritis models and in clinical practice.
This book introduces the role of Rapid Prototyping Techniques within the product development phase. It deals with the concept, origin, and working cycle of Rapid Prototyping Processes with emphasis on the applications. Apart from elaboration of engineering and non-engineering applications, it highlights recent applications like Bio-Medical Models for Surgical Planning, Molecular Models, Architectural Models, Sculptured Models, Psycho-Analysis Models. Special emphasis has been provided to the technique of generating human organs from live cells/tissues of the same human named 3D BIO PRINTERS. As the Rapid Prototyping Techniques are for tailor made products and not for mass manufacturing hence the book also elaborates on the mass manufacturing of rapid prototyped products. This includes casting and rapid tooling. The book concludes with Reverse Engineering and the role played by Rapid Prototyping Techniques towards the same. With globalization of market and advances in science and technology, the life span of products has shortened considerably. For early realization of products and short development period, engineers and researchers are constantly working together for more and more efficient and effective solutions. The most effective solution identified has been usage of computers in both designing and manufacturing. This gave birth to the nomenclatures CAD (Computer Aided Designing) and CAM (Computer aided Manufacturing). This was the initiation that ensured short product development and realization period. Researchers coined the concept as Rapid Prototyping. In contrast to Prototyping, Rapid prototyping is a group of techniques used to quickly fabricate a scale model of a physical part or assembly using three-dimensional computer aided design (CAD) data. Construction of the part or assembly is usually done using 3D printing or "additive or subtractive layer manufacturing" technology. The first methods for rapid prototyping became available in the late 1980s and were used to produce models and prototype parts. Today, they are used for a wide range of applications and are used to manufacture production-quality parts in relatively small numbers if desired without the typical unfavorable short-run economics. This economy has encouraged online service bureaus for early product realization or physical products for actual testing. This book is expected to contain Seven Chapters. Chapter 1 would explain product life cycle and the product development phase in the same, introducing role of Rapid Prototyping Techniques in Product development phase. Chapter 2 would deals with the concept, origin and working cycle of Rapid Prototyping Processes. Chapter 3 would concentrates on the applications of Rapid Prototyping Technology. Apart from elaboration of engineering and non-engineering applications, it also elaborates on recent applications like Bio-Medical Models for Surgical Planning, Molecular Models, Architectural Models, Sculptured Models, Psycho-Analysis Models etc. Chapter 4 would introduce the various Rapid Prototyping systems available worldwide. The chapter also introduces the technique of generating human organs from live cells/tissues of the same human named 3D BIO PRINTERS hence ensuring low rejection rate by human body. As the Rapid Prototyping Techniques are for tailor made products and not for mass manufacturing hence Chapter 5 would elaborates on the mass manufacturing of rapid prototyped products. This includes Casting and Rapid Tooling. Chapter 6 would deal with Reverse Engineering and the role played by Rapid Prototyping Techniques towards the same. As the product realization is primarily dependent on various softwares which are required to be understood for better accuracy so the concluding chapter of the book i.e. Chapter 7 would explain some software associated with the various techniques.
A: Einleitung und allgemeine Methodik.- 1 Flexibilitat und Marktorientierung in der Montage.- 1.1 Einleitung.- 1.2 Anforderungen an eine flexible und marktorientierte Montage.- 1.3 Ansatze zur Steigerung von Flexibilitat und Marktorientierung in der Montage.- 1.3.1 Blickwinkel Markt und Kunde.- 1.3.2 Blickwinkel Steuerung und Logistik.- 1.3.3 Blickwinkel Personal und Ressourcen.- 1.3.4 Blickwinkel Leistung und Kosten.- 1.4 UEberblick uber die Buchstruktur.- Literatur.- 2 Integrative und marktorientierte Montageplanung.- 2.1 Aufgaben und Ziele der Montageplanung.- 2.1.1 Traditioneller Betrachtungsfokus.- 2.1.2 Integrativer und marktorientierter Ansatz.- 2.2 Einsatz von Zielsystemen.- 2.2.1 Erstellen eines Zielhandbuchs.- 2.2.2 Mengen- und Zeitflexibilitatsziele.- 2.3. Projektmanagement bei der Montageplanung.- 2.3.1 Projektaufbauorganisation.- 2.3.2 Projektstrukturplan.- 2.3.3 Projektphasenorganisation.- 2.4 Prozessorientierung bei der Projektdurchfuhrung.- 2.4.1 Vorgehensprinzipien.- 2.4.2 Workshops.- 2.4.3 Beratereinsatz.- 2.5 Zusammenfassung.- Literatur.- B: Fachspezifische Ansatze zur Montageplanung.- 3 Ausrichtung der Montage auf den Markt mit Hilfe der Simulation.- 3.1 Einleitung und Motivation.- 3.2 Vorgehen bei der Erstellung eines Simulationsmodells.- 3.2.1 Identifikation des Problems.- 3.2.2 Analyse der Problemstruktur.- 3.2.3 Entwicklung und Einsatz des Simulationsmodells.- 3.2.4 Darstellung und Diskussion der Ergebnisse aus dem Simulationsmodell.- 3.3 Umsetzungsrelevante Aspekte.- 3.4 Zusammenfassung und Ausblick.- Literatur.- 4 Benchmarking als Ausgangsbasis fur die Neuorganisation montageunterstutzender Bereiche.- 4.1 Einleitung.- 4.2 Kombinierte Ansatzpunkte zur Neuorganisation montageunterstuer Bereiche.- 4.3 Benchmarking zur kontinuierlichen Optimierung der Montage und montageunterstutzenden Bereiche.- 4.4 Ablauf des Benchmarking.- 4.5 Anwendungsbeispiele fur Benchmarking in montageunterstuen Bereichen.- 4.5.1 Neuorganisation der Lagerhaltung.- 4.5.2 Neuorganisation der Konstruktion.- 4.5.3 Neuorganisation der Arbeitsvorbereitung.- 4.6 Zusammenfassung.- Literatur.- 5 Prozessorientierte Fertigungssegmentierung.- 5.1 Einleitung.- 5.2 Grundlagen fur die Segmentierung.- 5.3 Der Segmentierungsprozess im UEberblick.- 5.4 Phase 1: Vorbereitung der Segmentierung.- 5.4.1. Teambildung.- 5.4.2 Einfuhrung.- 5.4.3 Zielabgleich.- 5.4.4 Leitbild.- 5.5 Phase 2: Konzeption von Segmenten.- 5.5.1 Bildung von Bereichsalternativen anhand eines Beispiels.- 5.5.2 Synthese der Bereichsalternativen des Beispiels zu Gesamtalternativen.- 5.6 Phase 3: Entscheidung und Nachbereitung.- 5.7 Zusammenfassung.- Literatur.- 6 Montagesystemgestaltung am Beispiel der Montageinsel- Von der Idee zum Layout.- 6.1 Einleitung.- 6.2 Leitlinien der Montagesystemgestaltung.- 6.3 Ziele und Zielsystem.- 6.4 Einsatz interdisziplinarer Planungsteams.- 6.5 Fallbeispiel Montageinsel.- 6.5.1 Kennzeichen einer Montageinsel.- 6.5.2 Ausgangssituation und Vorgehen im Fallbeispie1.- 6.5.3 Vorbereitende Analysen.- 6.5.4 Konzeption und Gestaltung der Montageinsel.- 6.5.5 Erfahrungen im Fallbeispiel.- 6.6 Zusammenfassung.- Literatur.- 7 Entwicklungsfahige Arbeitsorganisation in der Montage.- 7.1 Einleitung.- 7.2 Einbindung der Arbeitsorganisation in die Unternehmensentwicklung.- 7.3 Qualifikationsfoerderliche Arbeitssystemgestaltung mit Praxisbeispielen.- 7.3.1 Beispiel fur qualifikationsfoerderliche Arbeit in einer Montageinsel.- 7.3.2 Beispiel fur die Gestaltung einer hybriden Produktionseinheit.- 7.4 Verzahnung von Organisations- und Personalentwicklung.- 7.4.1 Vorgehenskonzept zur Einfuhrung von Gruppenarbeit.- 7.4.2 Leitlinien fur Einfuhrung von Gruppenarbeit.- 7.5 Zusamsmenfassung.- Literatur.- 8 Prozessorientierte Planung und Steuerung zur Unterstutzung der Montage-Konzept und PPS-Systemauswahl.- 8.1 Einleitung.- 8.2 Grundlagen eines Planungs und Steuerungskonzepts.- 8.2.1 Zielsystem der PPS.- 8.2.2 Das PPS-Konzept im betrieblichen Umfeld.- 8.
Industrial energy efficiency is one of the most important means of reducing the threat of increased global warming. Research however states that despite the existence of numerous technical energy efficiency measures, its deployment is hindered by the existence of various barriers to energy efficiency. The complexity of increasing energy efficiency in manufacturing industry calls for an interdisciplinary approach to the issue. Improving energy efficiency in industrial energy systems applies an interdisciplinary perspective in examining energy efficiency in industrial energy systems, and discusses how "cross-pollinating" perspectives and theories from the social and engineering sciences can enhance our understanding of barriers, energy audits, energy management, policies, and programmes as they pertain to improved energy efficiency in industry. Apart from classical technical approaches from engineering sciences, Improving energy efficiency in industrial energy systems couples a sociotechnical perspective to increased energy efficiency in industry, showing that industrial energy efficiency can be expected to be shaped by social and commercial processes and built on knowledge, routines, institutions, and methods established in networks. The book can be read by researchers and policy-makers, as well as scholars and practicians in the field. "This book is extremely valuable for anyone who is designing or executing energy efficiency policies, schemes or projects aiming at SMEs. Both authors deserve the highest respect, and the combination of their expertise makes the results truly unique." - Daniel Lundqvist, programme manager at the Swedish energy agency "For anyone interested in improving energy efficiency in industry, this is a must-read. The book combines tools from social science and engineering to discuss the state of art today as well as possible development path tomorrow. This is a compelling book that I find useful both in my teaching and my research." - Kajsa Ellegard, Professor at Linkoeping University, Sweden "The book Improving energy efficiency in industrial energy systems is a novel approach on how improved levels of energy efficiency can be reached in industrial energy systems by merging engineering with social sciences. It is with delight that I can recommend their book to anyone interested in the field."- Mats Soederstroem, Director Energy Systems Programme, Linkoeping University, Sweden |
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