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Author: Pierre Kalifa
Publisher:
ISBN:
Category :
Languages : fr
Pages : 149
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Book Description
ETUDE DU COMPORTEMENT MECANIQUE DE LA GLACE POLYCRISTALLINE EN COMPRESSION A DES VITESSES DE DEFORMATION CORRESPONDANT A LA TRANSITION DUCTILE-FRAGILE, ETUDE CENTREE SUR 2 POINTS: -1) ETUDE DES PROCESSUS DE NUCLEATION ET DE CROISSANCE DES FISSURES DANS LA GLACE EN COMPRESSION TRIAXIALE; -2) CARACTERISATION DE LA RESISTANCE LIMITE DE LA GLACE ET DE SON ETAT STRUCTURAL AU PIC DE CONTRAINTE. UN MODELE DE NUCLEATION DE FISSURE EST ADAPTE A PARTIR D'UN EMPILEMENT DE DISLOCATION POUR PRENDRE EN COMPTE L'EFFET INHIBITIF DES CONTRAINTES EXTERNES SUR LA CROISSANCE DES FISSURES. LA VARIATION DE LA DENSITE DE FISSURES EST ETUDIEE AU PIC DE CONTRAINTE AVEC LA PRESSION DE CONFINEMENT ET LA VITESSE DE DEFORMATION
Author: Pierre Kalifa
Publisher:
ISBN:
Category :
Languages : fr
Pages : 149
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Book Description
ETUDE DU COMPORTEMENT MECANIQUE DE LA GLACE POLYCRISTALLINE EN COMPRESSION A DES VITESSES DE DEFORMATION CORRESPONDANT A LA TRANSITION DUCTILE-FRAGILE, ETUDE CENTREE SUR 2 POINTS: -1) ETUDE DES PROCESSUS DE NUCLEATION ET DE CROISSANCE DES FISSURES DANS LA GLACE EN COMPRESSION TRIAXIALE; -2) CARACTERISATION DE LA RESISTANCE LIMITE DE LA GLACE ET DE SON ETAT STRUCTURAL AU PIC DE CONTRAINTE. UN MODELE DE NUCLEATION DE FISSURE EST ADAPTE A PARTIR D'UN EMPILEMENT DE DISLOCATION POUR PRENDRE EN COMPTE L'EFFET INHIBITIF DES CONTRAINTES EXTERNES SUR LA CROISSANCE DES FISSURES. LA VARIATION DE LA DENSITE DE FISSURES EST ETUDIEE AU PIC DE CONTRAINTE AVEC LA PRESSION DE CONFINEMENT ET LA VITESSE DE DEFORMATION
Author: Stephen J. Jones
Publisher: Springer Science & Business Media
ISBN: 3642841007
Category : Technology & Engineering
Languages : en
Pages : 724
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Book Description
IUTAM-IAHR Symposium on Ice-Structure Interaction Professor Bez Tabarrok, Chairman of the Canadian National Committee (CNC) of the International Union of Theoretical and Applied Mechanics (IUTAM) invited Professor Derek Muggeridge to organize a symposium on ice structure interaction. Dr. Muggeridge readily agreed and prepared a proposal that was endorsed by the CNC and presented to the General Assembly Meeting of IUTAM for their consideration. This Assembly gave its approval and provided the local organizing committee with the names of individuals who were willing to serve on the Scientific Committee. Dr. Muggeridge became chairman of this committee and Dr. Ian Jordaan became co-chairman of this committee as well as chairman of the local organizing committee. The symposium followed the very successful previous meeting, chaired by Professor P. Tryde in Copenhagen, by ten years. Both symposia uti lized Springer-Verlag to publish their proceedings. The Faculty of En gineering and Applied Science at Memorial University of Newfoundland were particul{lXly pleased to host this prestigious symposium as it marked the twentieth anniversary of its Ocean Engineering Research Centre.
Author: Erland M. Schulson
Publisher: Cambridge University Press
ISBN: 0521806208
Category : Science
Languages : en
Pages : 403
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Book Description
The first complete account of the physics of the creep and fracture of ice, for graduates, engineers and scientists.
Author: Guy Ouillon
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Author: Olivier Plé
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Ce travail est centre sur l'etude de la nucleation de fissures dans la glace. Une partie importante de l'etude a ete consacree a la mise au point d'une glace artificielle qui fournit un materiau bidimensionnel ideal pour un couplage d'etudes experimentales et theoriques. Notre demarche a consiste a conduire une serie d'experiences de fluage sur ce type de materiau et sur le type de glace couramment utilise par la communaute des glaciologues. Selon le niveau de contrainte (entre 0,5 et 1 mpa) le fluage de la glace etait accompagne ou non par de l'endommagement. La partie la plus originale de l'etude experimentale reside dans l'analyse des images video qui permettait l'enregistrement de l'apparition des fissures dans le tiers central des echantillons. Nous avons ainsi obtenu une base de donnees importante sur la taille des fissures, leur orientation et leur localisation et sur les deformations de la glace. La confrontation des resultats experimentaux et des analyses theoriques nous a permis de renforcer nos connaissances sur les mecanismes physiques qui sont a l'origine des processus de deformation et de germination de fissures dans la glace de lac. Enfin, en utilisant le modele de l'inclusion d'eshelby, dans le cadre d'un comportement viscoplastique newtonien, nous discutons un critere de nucleation base sur le facteur d'intensite de contrainte en mode 1.
Author:
Publisher:
ISBN:
Category : Civil engineering
Languages : en
Pages : 572
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Author: Peter G. Knight
Publisher: John Wiley & Sons
ISBN: 0470750235
Category : Science
Languages : en
Pages : 544
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Book Description
Glacier Science and Environmental Change is an authoritative and comprehensive reference work on contemporary issues in glaciology. It explores the interface between glacier science and environmental change, in the past, present, and future. Written by the world’s foremost authorities in the subject and researchers at the scientific frontier where conventional wisdom of approach comes face to face with unsolved problems, this book provides: state-of-the-art reviews of the key topics in glaciology and related disciplines in environmental change cutting-edge case studies of the latest research an interdisciplinary synthesis of the issues that draw together the research efforts of glaciologists and scientists from other areas such as geologists, hydrologists, and climatologists color-plate section (with selected extra figures provided in color at www.blackwellpublishing.com/knight). The topics in this book have been carefully chosen to reflect current priorities in research, the interdisciplinary nature of the subject, and the developing relationship between glaciology and studies of environmental change. Glacier Science and Environmental Change is essential reading for advanced undergraduates, postgraduate research students, and professional researchers in glaciology, geology, geography, geophysics, climatology, and related disciplines.
Author: Brian Norton
Publisher: Springer Science & Business Media
ISBN: 9400772750
Category : Technology & Engineering
Languages : en
Pages : 271
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Book Description
Systems engineered by man to harness solar heat in a controlled manner now include a diverse range of technologies each serving distinctive needs in particular climate contexts. This text covers the breadth of solar energy technologies for the conversion of solar energy to provide heat, either as the directly-used output or as an intermediary to other uses such as power generation or cooling. It is a wholly updated, extended and revised version of “Solar Energy Thermal Technology” first published in 1992. The text draws on the own author’s research and that of numerous colleagues and collaborators at Cranfield University, University of Ulster, Dublin Institute of Technology, Indian Institute of Technology, Delhi and University of Nigeria. The initial chapters deal with relevant fundamental aspects of solar energy meteorology, radiative heat transfer, material properties and energy storage. Solar energy collectors are discussed in detail before a set of chapters deal with each of the full range of applications. The early chapters consider: the solar energy resource, its distribution in geographical, spectral, skyward geometrical and temporal domains; the physics of solar energy absorption, transmission and loss at surfaces; and techniques for storing collected solar energy. Specific collector sub-systems are then discussed in chapters seven to nine. For each system, practical issues are discussed and a proven analytical procedure for predicting performance described. Similarly analyses are presented in the concluding chapters on solar energy systems. These range from dryers to greenhouses to systems that render buildings solar energy systems in themselves and the associated design issues. The context for any use of solar energy is the prevailing climate. This text, being global in scope, definates the most appropriate regions for particular technologies and applications. It is a research-orientated academic work citing publications on the peer-reviewed literature covering engineering and applied science topics intended both for student use, as a reference tool for teaching solar energy and for those researching solar thermal applications in universities, industry or national/commercial laboratories. Insight into the challenges of implementation including practical constraints and operational considerations are provided to aid those undertaking feasibility studies, technical assistance, training assignments or operating testing facilities.
Author: Weinong W. Chen
Publisher: Springer Science & Business Media
ISBN: 1441979824
Category : Technology & Engineering
Languages : en
Pages : 390
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Book Description
The authors systematically describe the general principles of Kolsky bars, or split Hopkinson bars, which are widely used for obtaining dynamic material properties. Modifications are introduced for obtaining reliable data. Specific experiment design guidelines are provided to subject the specimen to desired testing conditions. Detailed Kolsky-bar examples are given for different classes of materials (brittle, ductile, soft, etc) and for different loading conditions (tension, torsion, triaxial, high/low temperatures, intermediate strain rate, etc). The Kolsky bars used for dynamic structural characterization are briefly introduced. A collection of dynamic properties of various materials under various testing conditions is included which may serve as a reference database. This book assists both beginners and experienced professionals in characterizing high-rate material response with high quality and consistency. Readers who may benefit from this work include university students, instructors, R & D professionals, and scholars/engineers in solid mechanics, aerospace, civil and mechanical engineering, as well as materials science and engineering.
Author: Geological Survey of Canada
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 512
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Book Description
