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Contribution A La Modelisation Numerique De La Mise En Forme Des Corps Creux Plastiques
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Book Synopsis Contribution à la modélisation numérique de la mise en forme des corps creux plastiques by : Samir Ben Chaabane
Download or read book Contribution à la modélisation numérique de la mise en forme des corps creux plastiques written by Samir Ben Chaabane and published by . This book was released on 1994 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objectif de la présente thèse est de mettre au point un prototype de logiciel destiné à la simulation numérique du soufflage des corps creux plastiques. De nombreux phénomènes complexes sont pris en compte dans le modèle : grandes déformations, comportement hyperélastique, contact deux approches numériques (inverse et incrémentale) basées sur la méthode des éléments finis sont développées. Ces deux approches ont un caractère implicite et supposent un comportement membranaire de la structure. Un élément fini de coque axisymétrique et un élément triangulaire tridimensionnel ont été utilisés pour discrétiser les parois plastiques, et pour représenter les contacteurs. L'utilisation d'une loi de comportement totale nous a permis d'imposer au choix l'épaisseur finale ou l'épaisseur initiale connue. Des exemples axisymétriques et tridimensionnels sont traités, et les résultats obtenus sont comparés dans la mesure du possible à des mesures expérimentales. La validité et l'intérêt de l'approche inverse sont prouvés à l'aide d'exemples.
Book Synopsis Contribution à la simulation numérique du soufflage-thermoformage de corps creux plastiques axisymétriques by : Mustapha Ziane
Download or read book Contribution à la simulation numérique du soufflage-thermoformage de corps creux plastiques axisymétriques written by Mustapha Ziane and published by . This book was released on 1999 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les procédés de mise en forme des corps creux plastiques (le soufflage et le thermoformage) mettent en jeux des phénomènes complexes tels que les grandes transformations, non linéarités matérielles, contact, dans ce contexte, un prototype de logiciel destiné à la simulation numérique de ces procédés a été mis au point. Une attention particulière a été portée sur les structures de type axisymétrique. La paraison et la feuille plastique sont discrétisées par plusieurs modèles éléments finis (membrane, coque, solide) de degré croissant en complexité afin de mettre en évidence les limitations du modèle simplifié de membrane et de quantifier les effets de flexion. La description du comportement des matériaux plastiques est assurée par deux types de lois de comportement : _ modèle hyper élastique incompressible ou quasi-incompressible, _ modèle viscoélastique incompressible. L'intégration temporelle est effectuée avec des schémas d'intégration numérique implicites et explicites associés à des techniques de contrôle du pas de temps. Un aspect important de la simulation numérique de tels procédés est le problème du contact et la définition des surfaces de contact. Ce dernier aspect a été traité par le développement d'algorithmes de recherche automatique des surfaces de contact. La validation est réalisée sur des géométries axisymétriques. Les résultats obtenus sont comparés à des mesures expérimentales ou des valeurs issues du code éléments finis abaqus.
Book Synopsis Contribution à la modélisation 3D volumique de la mise en forme des corps plastiques creux by : Tewfik Ghomari
Download or read book Contribution à la modélisation 3D volumique de la mise en forme des corps plastiques creux written by Tewfik Ghomari and published by . This book was released on 2007 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: L’objectif principal de cet thèse est de mettre au point un logiciel de mise en forme des corps plastiques creux 3D axisymétriques, avec une répartition précise des épaisseurs et un coût de calcul moins élevé. Cela est devenu possible avec l’élaboration d’un nouvel élément fini de solide axisymétrique (baptisé SFRQ-Axi) basé sur le concept cinématique de rotation d’une fibre spatiale (Space Fiber Rotation concept). L’élément fini développé a l’avantage de converger rapidement pour les problèmes à contact présentant des zones de flexion. Le choix de l’algorithme de recherche de contact joue aussi un rôle dans le traitement rapide de la gestion des nœuds candidats au contact. Un algorithme de recherche local simple est élaboré pour tester la pénétration des segments « masters » par les nœuds « slaves ». Des difficultés numériques rencontrées auxquelles nous avions fait face, et qui sont dues aux fortes non linéarités géométriques, matérielles et surtout aux non linéarités de contact. Soulignons aussi la difficulté de gérer l’incompressibilité des éléments finis 3D volumiques ou axisymétriques. Deux approches de calcul implicite et explicite sont traitées pour un exemple de biberon. Les résultats obtenus montre la bonne précision du calcul implicite par rapport au calcul explicite. Les tests de validation de l’élément SFRQ-Axi avec contact sur un test de flexion d’une plaque circulaire, s’enroulant sur un tore rigide, montre la bonne vitesse de convergence et une meilleure précision des résultats des épaisseurs. Les résultats des tests de mise en forme donnent aussi une bonne répartition des épaisseurs à l’intérieur de la plage donnée par les résultats expérimentaux.
Book Synopsis Heat Transfer in Polymer Composite Materials by : Nicolas Boyard
Download or read book Heat Transfer in Polymer Composite Materials written by Nicolas Boyard and published by John Wiley & Sons. This book was released on 2016-03-28 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses general information, good practices and examples about thermo-physical properties, thermo-kinetic and thermo-mechanical couplings, instrumentation in thermal science, thermal optimization and infrared radiation.
Book Synopsis Adhesion between polymers and concrete / Adhésion entre polymères et béton by : H. R. Sasse
Download or read book Adhesion between polymers and concrete / Adhésion entre polymères et béton written by H. R. Sasse and published by Springer. This book was released on 2013-11-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.
Download or read book Satellite Situation Report written by and published by . This book was released on 1978-12 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dictionary of Building and Civil Engineering by : Don Montague
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 Space Debris written by Heiner Klinkrad and published by Springer Science & Business Media. This book was released on 2006-09-01 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The future evolution of the debris environment will be forecast on the basis of traffic models and possible hazard mitigation practices. The text shows how large trackable objects will have re-entry pinpointed and predictions made on related risk assessment for possible ground impact. Models will also be described for meteoroids which are also a prevailing risk.
Author :International Atomic Energy Agency Publisher :International Atomic Energy Agency ISBN 13 :9789201063205 Total Pages :72 pages Book Rating :4.0/5 (632 download)
Book Synopsis In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 by : International Atomic Energy Agency
Download or read book In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2020-08-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.
Book Synopsis Acoustics of Porous Media by : Thierry Bourbié
Download or read book Acoustics of Porous Media written by Thierry Bourbié and published by Editions TECHNIP. This book was released on 1987 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Divergent (Divergent Trilogy, Book 1) by : Veronica Roth
Download or read book Divergent (Divergent Trilogy, Book 1) written by Veronica Roth and published by HarperCollins UK. This book was released on 2013-11-07 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: The explosive debut by No. 1 New York Times bestselling author Veronica Roth. DIVERGENT – a major motion picture series.
Book Synopsis Narratives of fear and safety by : Kaisa Kaukiainen
Download or read book Narratives of fear and safety written by Kaisa Kaukiainen and published by BoD - Books on Demand. This book was released on 2020-09-01 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: The essays in this edited volume, written in English and French, tackle the intriguing problems of fear and safety by analysing their various meanings and manifestations in literature and other narrative media. The articles bring forth new, cross-cultural interpretations on fear and safety through examining what kinds of genre-specific means of world-making narratives use to express these two affectivities. The articles also show how important it is to study these themes in order to understand challenges in times of global threats, such as the climate crisis. The main themes of the book are approached from various theoretical perspectives as related to their literary and cultural representations. Recent trends in research, such as affect and risk theory, serve as the basis for the discussion. The articles in the volume also draw from disciplines such as gender studies and trauma studies to examine the threats posed by collective fears and aggression on individuals' lives and propose ways of coping with fear. These themes are addressed also in articles analysing new adaptations of old myths that retell stories of the past. Many of the articles in the volume discuss apocalyptic and dystopian narratives that currently permeate the entire cultural landscape. Dystopian narratives do not only deal with future threats, such as totalitarianism, technocracy, or environmental disasters, but also suggest alternative ways of being and new hopes in the form of political resistance.
Download or read book Baudrillard Now written by Ryan Bishop and published by John Wiley & Sons. This book was released on 2013-04-17 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: The writings of Jean Baudrillard have dramatically altered the face of critical theory and promise to pose challenges well into the 21st century. His work on simulation, media, the status of the image, the system of objects, hyperreality, and information technology continues to influence intellectual work in a diverse set of fields. This volume uniquely provides overviews of Baudrillards career while also simultaneously including examples of current works on and with Baudrillard that engage some of the many and varied ways Baudrillard's work is being addressed, deployed, and critiqued in the present. As such, it offers chapters useful to the novice and the well-versed in critical theory and Baudrillard Studies alike. Contributors to the volume include John Armitage, John Beck, Ryan Bishop, Doug Kellner, John Phillips and Mark Poster. No less controversial today than he was in the past, Baudrillard continues to divide intellectuals and academicians, an issue this volume addresses by re-engaging the writing itself without falling into either simplistic dismissal or solipsistic cheerleading, but rather by taking the fecundity operative in the thought and meeting its consistent challenge. Baudrillard Now provokes sustained interaction with one of philosophy?s most important, provocative and stimulating thinkers.
Book Synopsis Biodiversity and Sustainable Development by : Rabindra Nath Pati
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.
Book Synopsis Lasers in Materials Processing by : Edward A. Metzbower
Download or read book Lasers in Materials Processing written by Edward A. Metzbower and published by ASM International(OH). This book was released on 1983 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Making written by Tim Ingold and published by Routledge. This book was released on 2013-04-12 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Making creates knowledge, builds environments and transforms lives. Anthropology, archaeology, art and architecture are all ways of making, and all are dedicated to exploring the conditions and potentials of human life. In this exciting book, Tim Ingold ties the four disciplines together in a way that has never been attempted before. In a radical departure from conventional studies that treat art and architecture as compendia of objects for analysis, Ingold proposes an anthropology and archaeology not of but with art and architecture. He advocates a way of thinking through making in which sentient practitioners and active materials continually answer to, or ‘correspond’, with one another in the generation of form. Making offers a series of profound reflections on what it means to create things, on materials and form, the meaning of design, landscape perception, animate life, personal knowledge and the work of the hand. It draws on examples and experiments ranging from prehistoric stone tool-making to the building of medieval cathedrals, from round mounds to monuments, from flying kites to winding string, from drawing to writing. The book will appeal to students and practitioners alike, with interests in social and cultural anthropology, archaeology, architecture, art and design, visual studies and material culture.
Book Synopsis The Cinematic Body by : Steven Shaviro
Download or read book The Cinematic Body written by Steven Shaviro and published by U of Minnesota Press. This book was released on 1994 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: A radical approach to film viewing
