Download or read book Mod lisation et identification du comportement non lin aire des cales en caoutchouc written by Patricia Saad and published by . This book was released on 2003 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les propriétés des élastomères (grandes déformations, amortissement) rendent leur utilisation très intéressante d'un point de vue industriel. Ces matériaux sont aujourd'hui de plus en plus utilisés notamment dans des secteurs de l'industrie tels que l'automobile ou l'aéronautique. Cette utilisation concerne généralement des pièces qui sont soumises à de fortes sollicitations mécaniques (statiques et dynamiques). Le comportement à modéliser est alors fortement non linéaire, les non linéarités étant aussi bien géométriques (dues aux grandes déformations imposées) que comportementales (les lois de comportement utilisées sont non linéaires). Pour représenter ces aspects, des lois de comportement complexes sont implantées dans des codes de calcul éléments finis. Mais leur utilisation aboutit à des modèles coûteux numériquement, et comportant un grand nombre de degrés de liberté. De plus cela ne permet pas d'écrire une relation analytique utilisable dans des logiciels multicorps pour simuler le comportement d'une pièce en élastomère. Ce travail de thèse propose un modèle simplifié à peu de degrés de liberté pour approximer la réponse des liaisons élastiques en élastomère utilisées dans l'industrie automobile. Pour ce faire on utilise une approximation de Ritz pour décrire les déplacements et la géométrie des pièces. Cela permet d'obtenir une approximation des courbes effort déplacement. Des lois de comportement hyperélastiques et viscoélastiques sont prises en compte dans le modèle. Une deuxième partie est consacrée à l'extension du modèle pour prendre en compte la dissipation non linéaire des élastomères. De nombreux essais sont réalisés à différents niveaux d'amplitude d'excitation, de fréquence, et de précharge. Pour approcher la dépendance en amplitude du module dynamique, on effectue un développement en séries de Volterra de la relation contraintes déformations. L'influence de la précharge est prise en compte par linéarisation d'un modèle hyperviscoélastique.
Download or read book Challenging Glass 3 written by Freek Bos and published by IOS Press. This book was released on 2012 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are two things everybody knows about glass: it is transparent, and it breaks! These are also the properties that constitute the challenge of glass as an architectural and structural material. This book presents papers from the third Challenging Glass Conference (CGC3), held at the Technical University (TU) Delft, the Netherlands, in June 2012. The conference brings together glass engineering, research and design specialists. Papers are grouped under seven topic headings: project and case studies; joints, fixings and adhesives; strength, stability and safety (a category which includes a quarter of all the papers presented at the conference); laminates and composite design; curved and bended glass; architectural design and lighting and finally, glass in facades. Glass remains one of the most exciting materials available to designers and architects today. This book will be of interest to all those involved in working with glass in an architectural and structural context.
Download or read book Mod lisation num rique des liaisons lastiques en caoutchouc de la liaison au sol automobile destin e la simulation multi corps transitoire written by Béatrice Bourgeteau and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les articulations en caoutchouc naturel sont des éléments indispensables et nombreux dans une liaison au sol automobile afin d'assurer le filtrage des vibrations. Leur comportement non-linéaire, notamment visco-élastique et hystérétique engendrent cependant des phénomènes parfois indésirables ou imprévus qui peuvent impacter la dynamique du véhicule. Ce travail a permis de modéliser l'ensemble des comportements d'une articulation en caoutchouc grâce à un nouveau modèle, le modèle STVS ( Standard Triboelastic Visco Solid) inspiré des travaux sur le génie parasismique et notamment du modèle STS (Standard Triboelastic Solid) de V. Coveney. L'identification d'un tel modèle non-linéaire a été envisagée de différentes façons : empirique, d'après des données fréquentielles. Les bases d'une identification d'après des données temporelles sont également posées. L'introduction d'un modèle d'articulation identifié sur des mesures dans une simulation transitoire multi-corps de liaison au sol d'un véhicule permet de mettre en évidence des phénomènes qui jusqu'à présent n'étaient pas représentés par une simple élasticité, comme des effets de relaxation des articulations lors d'un échelon d'angle au volant, ou l'impact des différentes amplitudes de sollicitations.
Download or read book Sheet Metal written by and published by . This book was released on 2007 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Download or read book Biodiversity and Sustainable Development written by Rabindra Nath Pati and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at the First Global Summit on Sustainable Development and Biodiversity, held at Raipur during 7-9 February 2009.
Download or read book How to Design Wastewater Systems for Local Conditions in Developing Countries written by David M. Robbins and published by IWA Publishing. This book was released on 2014-03-15 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a practical handbook providing a step-by-step approach to the techniques used for characterizing wastewater sources and investigating sites where collection, treatment and reuse/disposal technologies will be installed. It is intended to help enable local implementation of on-site and decentralized wastewater management system (DWMS)for wide scale use in development settings. How to Design Wastewater Systems for Local Conditions in Developing Countries helps local service providers and regulatory officials make informed decisions through the use of tools, checklists and case studies. It includes a link to a web based community of on-site and decentralized wastewater professionals, which contains related tools and case studies. This handbook serves as a reference for training classes, certification programs, and higher education programs in civil and sanitary engineering. There is an increasing interest on the part of local government officials and private sector service providers to implement wastewater treatment systems to solve sanitation problems. The model presented in this handbook promotes activities that first generate data related to source and site conditions that represent critical inputs, and then applies this information to the technology selection process. Matching the most appropriate technologies to the specific needs of the wastewater project is the key that leads to long term sustainability. How to Design Wastewater Systems for Local Conditions in Developing Countries is an invaluable resource for public sector decision makers and private sector service providers in developing countries. It is also a useful text for students at engineering colleges in developing countries interested in taking a class that teaches the methods of decentralized wastewater management system (DWMS) development.
Download or read book Compendium of Sanitation Systems and Technologies written by Elizabeth Tilley and published by . This book was released on 2014 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geosimulation written by Itzhak Benenson and published by John Wiley & Sons. This book was released on 2004-08-20 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geosimulation is hailed as ‘the next big thing’ in geographic modelling for urban studies. This book presents readers with an overview of this new and innovative field by introducing the spatial modelling environment and describing the latest research and development using cellular automata and multi-agent systems. Extensive case studies and working code is available from an associated website which demonstrate the technicalities of geosimulation, and provide readers with the tools to carry out their own modelling and testing. The first book to treat urban geosimulation explicitly, integrating socio-economic and environmental modelling approaches Provides the reader with a sound theoretical base in the science of geosimulation as well as applied material on the construction of geosimulation models Cross-references to an author-maintained associated website with downloadable working code for readers to apply the models presented in the book Visit the Author's Website for further information on Geosimulation, Geographic Automata Systems and Geographic Automata Software http://www.geosimulationbook.com
Download or read book Scientific Canadian Mechanics Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book OECD FAO Agricultural Outlook 2013 written by OECD and published by OECD Publishing. This book was released on 2013-06-27 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nineteenth edition of the Agricultural Outlook, and the ninth prepared jointly with the Food and Agriculture Organization of the United Nations (FAO), provides projections to 2022 for the major agricultural commodities and biofuels as well as for fish and seafood.
Download or read book Virtual Geographic Environments written by Hui Lin and published by ESRI Press. This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Virtual Geographic Environments, edited by Hui Lin and Michael Batty, collects key papers that define the current momentum in GIS and "virtual geographies." Contributions by leading members of the geospatial community to Virtual Geographic Environments illustrate the cutting edge of GIScience, as well as new applications of GIS with the processing and delivery of geographic information through the Web and handheld devices, forming two major directions to these developments. The four-part organization leads from a primer on VGEs to virtual cities and landscapes, interface design and public participation, and finally mobile and networked VGEs. Current topics, such as crowd sourcing and related services, point to the development of new business models that merge proprietary and nonproprietary systems.
Download or read book Diversity of Organisms written by Caroline M. Pond and published by . This book was released on 1990 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describing the structure and habits of living organisms, including viruses, micro-organisms, plants and animals, this book considers how scientists acquire and use knowledge about these organisms to investigate their origins and relationships, and to explore basic biological mechanisms. The principles of the comparative method are explained, using examples from modern research.
Download or read book Urban Remote Sensing written by Xiaojun Yang and published by John Wiley & Sons. This book was released on 2011-04-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urban Remote Sensing is designed for upper level undergraduates, graduates, researchers and practitioners, and has a clear focus on the development of remote sensing technology for monitoring, synthesis and modeling in the urban environment. It covers four major areas: the use of high-resolution satellite imagery or alternative sources of image date (such as high-resolution SAR and LIDAR) for urban feature extraction; the development of improved image processing algorithms and techniques for deriving accurate and consistent information on urban attributes from remote sensor data; the development of analytical techniques and methods for deriving indicators of socioeconomic and environmental conditions that prevail within urban landscape; and the development of remote sensing and spatial analytical techniques for urban growth simulation and predictive modeling.
Download or read book Urban Remote Sensing written by Xiaojun X. Yang and published by John Wiley & Sons. This book was released on 2021-10-11 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urban Remote Sensing The second edition of Urban Remote Sensing is a state-of-the-art review of the latest progress in the subject. The text examines how evolving innovations in remote sensing allow to deliver the critical information on cities in a timely and cost-effective way to support various urban management activities and the scientific research on urban morphology, socio-environmental dynamics, and sustainability. Chapters are written by leading scholars from a variety of disciplines including remote sensing, GIS, geography, urban planning, environmental science, and sustainability science, with case studies predominately drawn from North America and Europe. A review of the essential and emerging research areas in urban remote sensing including sensors, techniques, and applications, especially some critical issues that are shifting the directions in urban remote sensing research. Illustrated in full color throughout, including numerous relevant case studies and extensive discussions of important concepts and cutting-edge technologies to enable clearer understanding for non-technical audiences. Urban Remote Sensing, Second Edition will be of particular interest to upper-division undergraduate and graduate students, researchers and professionals working in the fields of remote sensing, geospatial information, and urban & environmental planning.
