Download or read book Contribution l tude compar e de l usure de l outil et de la rugosit de la surface usin e written by Giuseppe Carro-Cao and published by . This book was released on 1967 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contribution l tude de l usure d outil de coupe en usinage assist par laser et l usinabilit d une c ramique base d oxyde de zinc written by Ahmed Melhaoui and published by . This book was released on 1997 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Définir une nouvelle génération d'outil de coupe adapté à l'UAL, maitriser les conditions de coupe pour différents types de matériaux, comprendre les phénomènes de l'interaction laser-matériau et disposer d'une base de connaissances capable de nous fournir les éléments de calcul nécessaires à la conception ou la transformation de centres d'usinage classique en centres d'usinage assisté par laser sont des étapes indispensables à l'industrialisation du procéde. Le travail qui va d'être présenté a pour objectif d'enrichir la base de connaissance du procède et de mettre en place une méthode d'optimisation capable de nous fournir une estimation de l'usure en temps réel, et cela, à travers l'analyse de l'émission acoustique générée par le contact outil - pièce et par les efforts de coupe. Dans un premier temps, l'étude porte sur l'usinabilité d'une céramique à base d'oxyde de zinc. Il est montré que le fait d'assister la coupe avec un faisceau laser améliore nettement l'état de surface, du fait de la réduction des efforts de coupe et de l'usure de l'outil. Dans un deuxième temps, un planétaire à queue en acier 16MnCr5 utilise par Renault est étudié. L’étude est centrée sur l'outil de coupe. Il a été démontré que la durée de vie des outils de coupe est largement augmenter par rapport a l'UC. Les premiers résultats expérimentaux obtenus montrent que, la puissance laser ou la combinaison de la puissance laser avec un autre paramètre, joue sur le comportement de l'usure. Une étude approfondie reste à faire sur ce point. Enfin, une étude d'optimisation de l'usure en fonction des paramètres du signal de l'émission acoustique généré lors du contact outil - pièce et par les efforts de coupe a été ébauché. Cette étude est basée sur un modèle autorégressif permettant de calculer certains coefficients qui conduisent à l'estimation de la valeur de l'usure. Le contrôle de l'usure en temps réel peut donc se faire simplement à travers le signal généré par le contact pièce - outil et les efforts appliques. Ce travail est un pas de plus franchi vers l'amélioration des connaissances du procédé par le biais de l'élargissement au mode d'usure des outils de coupe, ce qui est nouveau. C’est également le début d'un long travail de recherche qui aboutira a la définition de l'outil le plus adapté à la coupe avec assistance laser
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Download or read book Fatigue Design written by Eliahu Zahavi and published by CRC Press. This book was released on 2019-01-22 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern analytical theories of fatigue coupled with a knowledge of processing effects on metals make up the sound basis for designing machine parts that are free from unexpected failure. Fatigue Design: Life Expectancy of Machine Parts provides the information and the tools needed for optimal design. It highlights practical approaches for effectively solving fatigue problems, including minimizing the risk of hidden perils that may arise during production processes or from exposure to the environment.The material is presented with a dual approach: the excellent coverage of the theoretical aspects is accented by practical illustrations of the behavior of machine parts. The theoretical approach combines the fundamentals of solid mechanics, fatigue analysis, and crack propagation. The chapters covering fatigue theories are given special emphasis, starting with the basics and progressing to complicated multiaxial nonlinear problems.The practical approach concentrates on the effects of surface processing on fatigue life and it illustrates many faceted fatigue problems taken from case studies. The solutions demonstrate the authors' detailed analyses of failure and are intended to be used as preventive guidelines. The cases are a unique feature of the book. The numerical method used is the finite element method, and is presented with clear explanations and illustrations.Fatigue Design: Life Expectancy of Machine Parts is an extremely valuable tool for both practicing design engineers and engineering students.
Download or read book Archaeology Meets Science written by Holley Martlew and published by Oxbow Books. This book was released on 2008-03-14 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 'Archaeology meets Science' project is currently transforming our understanding of the Minoan and Mycenaean civilisations, through the in-depth application of state of the art scientific analyses to ceramic artefacts and skeletal material. This book is the fruit of this acclaimed research, which was carried out between 1997 and 2003, and presented in an exhibition in a number of museums across Europe and the United States, starting with the National Archaeological Museum in Athens. Moving beyond the standard archaeological format of illustrations with descriptions of contexts, the book analyses each object from the inside , and consequently each has a different story to tell. Organic residue and stable isotope analysis has extended our knowledge beyond anything previously gleaned through conventional archaeological research, and we now have a much better understanding of the food and drink consumed by ordinary people in Bronze Age Greece. There are some fascinating insights, such as the origin of modern Greek retsina, which was traced first to the time of Agamemnon, then to Crete in the 17th century BC and finally to the Early Minoan Period, c. 2000 BC. The book provides the primary scientific evidence on which the world renowned scientists who have carried out this work have based their conclusions.
Download or read book Low Friction Arthroplasty of the Hip written by J. Charnley and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theme of this work is the application of the engmeermg theory of frictional torque to total hip replacement. The author adhered tenaciously to this theory, involving the use of a small-diameter femoral head, throughout the epoch when the large-diame ter, metal-to-metal design dominated the field. During that considerable period general satisfaction with the early results rendered criticisms of the large-diameter head unwelcome. There was a formidable array of counter criticism: the small head would pierce a film of synovial fluid; the small head would wear the socket too rapidly; the small head would always have a high risk of dislocation; detachment of the trochanter, to achieve precise orientation for the small head, was unacceptable. But all these objections have now been largely overcome. Lubrication of high molecular weight polyethylene (HMWP) on metal is now accepted as being mainly by the boundary regime with thick fluid films playing no part. We now know that HMWP can indeed tolerate the very high stresses imposed by the small head and in tribological theory there may even be some advantage in high stress. Dislocation is now known not to be an automatic sequel to the small head.
Download or read book Ceramics Cuisine and Culture written by Michela Spataro and published by Oxbow Books. This book was released on 2015-10-31 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 23 papers presented here are the product of the interdisciplinary exchange of ideas and approaches to the study of kitchen pottery between archaeologists, material scientists, historians and ethnoarchaeologists. They aim to set a vital but long-neglected category of evidence in its wider social, political and economic contexts. Structured around main themes concerning technical aspects of pottery production; cooking as socioeconomic practice; and changing tastes, culinary identities and cross-cultural encounters, a range of social economic and technological models are discussed on the basis of insights gained from the study of kitchen pottery production, use and evolution. Much discussion and work in the last decade has focussed on technical and social aspects of coarse ware and in particular kitchen ware. The chapters in this volume contribute to this debate, moving kitchen pottery beyond the Binfordian ‘technomic’ category and embracing a wider view, linking processualism, ceramic-ecology, behavioral schools, and ethnoarchaeology to research on historical developments and cultural transformations covering a broad geographical area of the Mediterranean region and spanning a long chronological sequence.
Download or read book The Science and Engineering of Cutting written by Tony Atkins and published by Butterworth-Heinemann. This book was released on 2009-07-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: The materials mechanics of the controlled separation of a body into two or more parts – cutting – using a blade or tool or other mechanical implement is a ubiquitous process in most engineering disciplines. This is the only book available devoted to the cutting of materials generally, the mechanics of which (toughness, fracture, deformation, plasticity, tearing, grating, chewing, etc.) have wide ranging implications for engineers, medics, manufacturers, and process engineers, making this text of particular interest to a wide range of engineers and specialists. - The only book to explain and unify the process and techniques of cutting in metals AND non-metals. The emphasis on biomaterials, plastics and non-metals will be of considerable interest to many, while the transfer of knowledge from non-metals fields offers important benefits to metal cutters - Comprehensive, written with this well-known author's lightness of touch, the book will attract the attention of many readers in this underserved subject - The clarity of the text is further enhanced by detailed examples and case studies, from the grating of cheese on an industrial scale to the design of scalpels
Download or read book Wood Machining written by J. Paulo Davim and published by John Wiley & Sons. This book was released on 2013-05-10 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wood as an engineering material can be technically defined “as a hygroscopic, orthotropic, biological, and permeable material having extreme chemical diversity and physical complexity with structures, that vary extensively in their shape, size, properties and function”. Therefore, using wood to its best advantage and most efficiency in engineering applications, specific characteristics or chemical, physical and mechanical properties must be considered. The products are divided into two classes, solid wood and composite wood products. Solid wood includes shipbuilding, bridges, flooring, mine timbers, etc. Composite wood products include insulation board, plywood, oriented strand board, hardboard and particle board. In recent years, the machining of wood products has acquired great importance due the short supply of wood and increasing environmental awareness among users and manufacturers. The optimization of the machining process centers around the mechanism of chip formation, tool wear, workpiece surface quality, crack initiation and propagation of different types of wood. Other factors are also humidity, temperature, static preloads, and vibrations that can affect the wood during the machining process. The book provides some fundamentals and recent research advances on machining wood and wood products.
Download or read book Perception Representations Image Sound Music written by Richard Kronland-Martinet and published by Springer Nature. This book was released on 2021-03-09 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 14th International Symposium on Perception, Representations, Image, Sound, Music, CMMR 2019, held in Marseille, France, in October 2019. The 46 full papers presented were selected from 105 submissions. The papers are grouped in 9 sections. The first three sections are related to music information retrieval, computational musicology and composition tools, followed by a section on notations and instruments distributed on mobile devices. The fifth section concerns auditory perception and cognition, while the three following sections are related to sound design and sonic and musical interactions. The last section contains contributions that relate to Jean-Claude Risset's research.
Download or read book Gas cooled Nuclear Reactors written by France. Commissariat à l'énergie atomique and published by . This book was released on 2006 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantitative Evaluation of the Sanding Quality in Furniture Manufacturing written by Lidia Gurau and published by . This book was released on 2007 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Adult Hip written by John J. Callaghan and published by Lippincott Williams & Wilkins. This book was released on 2007 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in its Second Edition, this two-volume reference is the only current book available that focuses on the adult hip. More than 100 chapters by the foremost leaders in hip surgery provide comprehensive coverage of disorders of the adult hip—from practical basic science to detailed surgical techniques including hip arthroscopy and developing techniques in minimally invasive surgery. More than 2,600 illustrations complement the text. This edition has new chapters on minimally invasive surgery of the hip. Other new topics covered include use of fiber metal mesh in acetabular revision reconstruction, revision press-fit Wagner type of stems, and implant retrievals.
Download or read book Water Resources in the Mediterranean Region written by Mehrez Zribi and published by Elsevier. This book was released on 2020-06-14 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water Resources in the Mediterranean Region summarizes and collates scientific developments around water resources in the Mediterranean socio-economic environment through a multidisciplinary framework synthesizing hydrology, hydrogeology, climate, bioclimatology, economics, and geography. As such, it provides essential information for any reader looking to learn more about the Mediterranean which is experiencing the impact of climate change and concurrent complex issues of anthropogenic effects, especially in agriculture and other resource uses. Water Resources in the Mediterranean Region covers different challenges in the issue of the evolution of water resources in the Mediterranean. It is intended for PhD students, research scientists, and managers interested in new solutions and approaches for water management and in the forecast of future water dynamics. Offers multidisciplinary content providing global visions of the challenges faced in the Mediterranean region Presents fundamental and operational studies, providing the reader with information on how to implement these actions and results themselves Written in a pedagogical manner, allowing for ease of reading for both researchers and water managers
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Download or read book The Voice in Cinema written by Michel Chion and published by Columbia University Press. This book was released on 1999 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chion analyzes imaginative uses of the human voice by directors like Lang, Hitchcock, Ophuls, Duras, and de Palma.
Download or read book From Microphysics to Macrophysics written by Roger Balian and published by Springer Science & Business Media. This book was released on 2007-06-26 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: This popular, often cited text returns in a softcover edition to provide a thorough introduction to statistical physics and thermodynamics, and to exhibit the universal chain of ideas leading from the laws of microphysics to the macroscopic behaviour of matter. A wide range of applications illustrates the concepts, and many exercises reinforce understanding. Volume II applies statistical methods to systems governed by quantum effects, in particular to solid state physics, explaining properties due to the crystal structure or to the lattice excitations or to the electrons. The last chapters are devoted to non-equilibrium processes and to kinetic equations, with many applications included.
