Download or read book UNE METHODE ENERGETIQUE DE MODELISATION DE LA VISCOELASTICITE NON LINEAIRE EN GRANDES DEFORMATIONS written by AMINA.. ALAOUI SOULIMANI and published by . This book was released on 1993 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'OBJECTIF DE CE TRAVAIL DE RECHERCHE EST LA MISE AU POINT D'UNE LOI DE COMPORTEMENT POUR DES MATERIAUX VISCOELASTIQUES SUBISSANT DES GRANDES DEFORMATIONS. ON RECHERCHE UNE FORMULATION QUI PERMETTE DE SEPARER, A CHAQUE INSTANT, L'ENERGIE ELASTIQUE STOCKEE PAR LE MATERIAU ET L'ENERGIE DISSIPEE PAR VISCOSITE. UNE ETUDE BIBLIOGRAPHIQUE FAIT LE POINT DES DIFFERENTES METHODES PROPOSEES A PARTIR DE LA GENERALISATION AU CAS NON LINEAIRE DES DEUX APPROCHES UTILISEES DANS LE CAS LINEAIRE. ON ANALYSE POURQUOI CES METHODES NE REPONDENT PAS A LA QUESTION POSEE. NOUS PROPOSONS UNE NOUVELLE LOI DE COMPORTEMENT QUE NOUS NOMMONS PSEUDO-LINEAIRE, BASEE SUR L'ECRITURE D'UN PRINCIPE DE SUPERPOSITION DE BOLTZMANN POUR UN COUPLE CONTRAINTES-DEFORMATIONS PARTICULIER. CE COUPLE PEUT ETRE DETERMINE A PARTIR DE L'APPROCHE CLASSIQUE DE L'HYPERELASTICITE CAOUTCHOUTIQUE ET NOUS MONTRONS COMMENT. NOUS ETUDIONS DE MANIERE APPROFONDIE LA COMPATIBILITE AVEC LA THERMODYNAMIQUE DES MILIEUX CONTINUS ET NOUS DONNONS LES EXPRESSIONS DES ENERGIES ELASTIQUE ET DISSIPEE EN FONCTION UNIQUEMENT DES GRANDEURS CARACTERISTIQUES DU COMPORTEMENT. NOUS PRESENTONS LA PROCEDURE EXPERIMENTALE DE CARACTERISATION RELATIVEMENT SOUPLE QUI PERMET DE DETERMINER LES FONCTIONS CARACTERISTIQUES DE LA LOI. NOUS PRESENTONS ENFIN DES EXEMPLES D'APPLICATIONS DE CETTE APPROCHE NOUVELLE ET TRAITONS ENTIEREMENT L'IDENTIFICATION QUI EST GRANDEMENT SIMPLIFIEE PAR LA FORMULATION THEORIQUE CHOISIE

Download or read book Damage Mechanics in Engineering Materials written by Jiann-Wen Woody Ju and published by Elsevier. This book was released on 1998-03-04 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains thirty peer-reviewed papers that are based on the presentations made at the symposium on "Damage Mechanics in Engineering Materials" on the occasion of the Joint ASME/ASCE/SES Mechanics Conference (McNU97), held in Evanston, Illinois, June 28-July 2, 1997. The key area of discussion was on the constitutive modeling of damage mechanics in engineering materials encompassing the following topics: macromechanics/micromechanical constitutive modeling, experimental procedures, numerical modeling, inelastic behavior, interfaces, damage, fracture, failure, computational methods. The book is divided into six parts: Study of damage mechanics. Localization and damage. Damage in brittle materials. Damage in metals and metal matrix composites. Computational aspects of damage models. Damage in polymers and elastomers.

Download or read book Proceedings of IMAC XX written by and published by . This book was released on 2002 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book COMPORTEMENT VISCOELASTIQUE DES ELASTOMERES DE POLYURETHANE EN GRANDES DEFORMATIONS MODELISATION VALIDATION written by HOCINE.. BECHIR and published by . This book was released on 1996 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'ANALYSE DES CONTRAINTES ET DES DEFORMATIONS DANS LES PROBLEMES DE CONTACT EST D'UNE TRES GRANDE IMPORTANCE EN CONSTRUCTION MECANIQUE, PAR EXEMPLE DANS LE DIMENSIONNEMENT DES STRUCTURES TRAVAILLANTES. LE COMPORTEMENT MECANIQUE DES ELASTOMERES DE POLYURETHANES EST NON LINEAIRE MEME POUR DE FAIBLES NIVEAUX DE CONTRAINTES. C'EST POURQUOI LE DEVELOPPEMENT DES LOIS DE COMPORTEMENT NE PEUT S'ENVISAGER QUE DANS LE CADRE DES GRANDES DEFORMATIONS IMPLIQUANT LE CHOIX DE LA CONFIGURATION DE TRAVAIL LAGRANGIENNE OU EULERIENNE. LA MODELISATION DU COMPORTEMENT HYPERELASTIQUE DES ELASTOMERES EST BASEE SUR L'ENERGIE VOLUMIQUE DE DEFORMATION. GENERALEMENT, L'HYPOTHESE D'INCOMPRESSIBILITE FACILITE L'ECRITURE DES LOIS DE COMPORTEMENT HYPERELASTIQUE, LES ESSAIS DEVELOPPES POUR IDENTIFIER CES LOIS ETANT LES ESSAIS DE TRACTION BIAXIALE ET DE CISAILLEMENT SIMPLE. NOUS AVONS DEVELOPPE DES MODELES DE COMPORTEMENT HYPERELASTIQUE DES ELASTOMERES COMPRESSIBLES. EN EFFET, LA DEMARCHE COMPORTE DEUX ETAPES : LA PREMIERE CONSISTE A CONSIDERER LE MATERIAU ARTIFICIELLEMENT INCOMPRESSIBLE CE QUI PERMET LE DEPOUILLEMENT DES MESURES PAR DES TECHNIQUES DU TYPE RIVLIN (MATERIAUX INCOMPRESSIBLES), LA SECONDE EST LA DEDUCTION DE LA PARTIE SPHERIQUE DE L'ESSAI DE TRACTION UNIAXIALE (ET NON DE COMPRESSION HYDROSTATIQUE). L'INTERET DE CETTE DEMARCHE EST DE METTRE EN EVIDENCE DES PARAMETRES COMPORTEMENTAUX PAR UN MINIMUM D'ESSAIS POUR LA GAMME DE DEFORMATIONS ENVISAGEES. SACHANT QUE LA VALIDATION DEMANDE UN AUTRE ESSAI, DE TORSION OU DE COMPRESSIBILITE PAR EXEMPLE, CAR DANS LE CAS OU LE COEFFICIENT DE POISSON EST PROCHE DE 0,5 LE MODULE DE COMPRESSION NE PEUT ETRE OBTENU QU'EXPERIMENTALEMENT. LA VISCOELASTICITE NON LINEAIRE A ETE MISE EN EVIDENCE POUR DES ESSAIS DE RELAXATION A DIFFERENTS TAUX DE DEFORMATION. LES PARAMETRES INTRINSEQUES DES POLYURETHANES DEPENDENT DE LA DEFORMATION ET DU TEMPS PAR L'INTERMEDIAIRE DES VITESSES. ON CONSIDERE QUE LA CONTRAINTE TOTALE EST LA SUPERPOSITION D'UNE CONTRAINTE RESULTANT DU COMPORTEMENT HYPERELASTIQUE ET D'UNE CONTRAINTE FAISANT INTERVENIR L'EFFET MEMOIRE, TOUJOURS SOUS DES HYPOTHESES DE COMPRESSIBILITE. LE MODELE FORMULE DECRIT LE COMPORTEMENT VISCOELASTIQUE DU MATERIAU.

Download or read book RHEOLOGIE ELONGATIONNELLE written by Patrice Rubio and published by . This book was released on 1999 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette étude rassemble des caractérisations rhéologiques en élongation et en phase fondue de polymères commerciaux à larges distributions de masse molaire et pouvant contenir des ramifications. Les viscosités transitoires en élongation uniaxiale sont sensibles aux caractéristiques physico-chimiques des matériaux, alors que les viscosités en élongation équibiaxiale et à l'état stable, mesurées par compression lubrifiée, ne montrent aucune différence de comportement entre des polymères linéraires et des polymères ramifiés.Nous pouvons rendre compte des influences de la structure moléculaire sur les propriétés rhéologiques en élongation en utilisant une équation de comportement de type k-bkz suivant le modèle de dynamique moléculaire de Doi et Edwards. Notre étude s'appuie sur des recherches en rhéologie moléculaire et permet d'introduire l'influence du tenseur sphérique des contraintes sur les temps de relaxation des chaines macromoléculaires soumises à une élongation. La modélisation représente correctement les propriétés rhéologiques en élongation et décrit quantitativement les orientations moléculaires des chaines macromoléculaires linéaires (PMMA). Nous modélisons les propriétés réhologiques de PEBD en viscoélasticité linéaire des travaux théoriques de McLeish. Nous proposons aussi une modélisation en viscoélasticité non linéaire en posant que les portions de tube entre ramifications subissent un étirement sous la déformation tout en s'orientant dans l'écoulement (Marrucci, Graesslay). Pour rendre compte de la réalité expérimentale, il faudrait tenir compte d'un processus de relaxation de l'étirement aux grandes déformations. Nous définissons un critère de déformation critique pour représenter la déformation de rupture d'un échantillon soumis à une élongation à vitesse de déformation constante et en régime transitoire. Un critère analogue peut être mis en évidence pas des simulations de tirage sur joncs en condition isotherme et utilisant une équation constitutive de type k-bkz.

Download or read book ANALYSE NUMERIQUE DU ROULAGE STATIONNAIRE DE STRUCTURES VISCOELASTIQUES NON LINEAIRES EN GRANDES DEFORMATIONS written by CHRISTOPHE.. RAHIER and published by . This book was released on 1991 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS LE CADRE DE LA THERMODYNAMIQUE DES PROCESSUS IRREVERSIBLES, UN FORMALISME LAGRANGIEN DE LOIS DE COMPORTEMENT VISCOELASTIQUES EST D'ABORD PRESENTE. CES LOIS S'EXPRIMENT AU MOYEN D'UNE EQUATION DIFFERENTIELLE NON LINEAIRE REGISSANT L'EVOLUTION D'UNE VARIABLE INTERNE. LES EQUATIONS DU ROULAGE STATIONNAIRE D'UNE STRUCTURE AXISYMETRIQUE ET VISCO-ELASTIQUE SONT ENSUITE OBTENUES A PARTIR DES LOIS DE CONSERVATION DE LA MECANIQUE DES MILIEUX CONTINUS. L'ANALYSE NUMERIQUE DES EQUATIONS D'EVOLUTION PERIODIQUE, DEDUITES PAR LINEARISATION DE CELLES DU ROULAGE, PERMET DE PROUVER L'EXISTENCE ET L'UNICITE DE SOLUTION AUX PROBLEMES CONTINU ET APPROCHE. PUIS, LA CONVERGENCE DES APPROXIMATIONS EN ESPACE ET EN TEMPS EST DEMONTREE. EN S'INSPIRANT DES RESULTATS PRECEDENTS, UNE APPROXIMATION BASEE SUR CELLE DES ELEMENTS FINIS ET UNE TECHNIQUE DE RESOLUTION DU SYSTEME ALGEBRIQUE DEDUIT SONT PROPOSEES. L'ELIMINATION DE LA VARIABLE INTERNE PERMET DE CONSERVER UN ALGORITHME PROCHE DE CELUI DU CAS ELASTIQUE PUR. LA RESOLUTION SEPAREE DES EQUATIONS VISCOELASTIQUES EXPLOITE ALORS AU MIEUX LEUR FORME PARTICULIERE. ENFIN, DES TESTS NUMERIQUES METTENT EN EVIDENCE L'INTERET DES METHODES CHOISIES ET L'INFLUENCE DE LA VISCOELASTICITE SUR LES RESULTATS

Download or read book Continuum Mechanics Through the Twentieth Century written by Gerard A Maugin and published by Springer Science & Business Media. This book was released on 2013-04-08 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This overview of the development of continuum mechanics throughout the twentieth century is unique and ambitious. Utilizing a historical perspective, it combines an exposition on the technical progress made in the field and a marked interest in the role played by remarkable individuals and scientific schools and institutions on a rapidly evolving social background. It underlines the newly raised technical questions and their answers, and the ongoing reflections on the bases of continuum mechanics associated, or in competition, with other branches of the physical sciences, including thermodynamics. The emphasis is placed on the development of a more realistic modeling of deformable solids and the exploitation of new mathematical tools. The book presents a balanced appraisal of advances made in various parts of the world. The author contributes his technical expertise, personal recollections, and international experience to this general overview, which is very informative albeit concise.

Download or read book Basic Concepts for Simple and Complex Liquids written by Jean-Louis Barrat and published by Cambridge University Press. This book was released on 2003-03-27 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting a unified approach, this book focusses on the concepts and theoretical methods that are necessary for an understanding of the physics and chemistry of the fluid state. The authors do not attempt to cover the whole field in an encyclopedic manner. Instead, important ideas are presented in a concise and rigorous style, and illustrated with examples from both simple molecular liquids and more complex soft condensed matter systems such as polymers, colloids, and liquid crystals.

Download or read book Proceedings of the RILEM International Symposium on Bituminous Materials written by Hervé Di Benedetto and published by Springer Nature. This book was released on 2021-09-25 with total page 1806 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume highlights the latest advances, innovations, and applications in bituminous materials and structures and asphalt pavement technology, as presented by leading international researchers and engineers at the RILEM International Symposium on Bituminous Materials (ISBM), held in Lyon, France on December 14-16, 2020. The symposium represents a joint effort of three RILEM Technical Committees from Cluster F: 264-RAP “Asphalt Pavement Recycling”, 272-PIM “Phase and Interphase Behaviour of Bituminous Materials”, and 278-CHA “Crack-Healing of Asphalt Pavement Materials”. It covers a diverse range of topics concerning bituminous materials (bitumen, mastics, mixtures) and road, railway and airport pavement structures, including: recycling, phase and interphase behaviour, cracking and healing, modification and innovative materials, durability and environmental aspects, testing and modelling, multi-scale properties, surface characteristics, structure performance, modelling and design, non-destructive testing, back-analysis, and Life Cycle Assessment. The contributions, which were selected by means of a rigorous international peer-review process, present a wealth of exciting ideas that will open novel research directions and foster new multidisciplinary collaborations.

Download or read book Asphalt Pavements written by Y. Richard Kim and published by CRC Press. This book was released on 2014-11-06 with total page 1966 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt Pavements contains the proceedings of the International Conference on Asphalt Pavements (Raleigh, North Carolina, USA, 1-5 June 2014), and discusses recent advances in theory and practice in asphalt materials and pavements. The contributions cover a wide range of topics:- Environmental protection and socio-economic impacts- Additives and mo

Download or read book On the Continuity of the Gaseous and Liquid States written by J. D. Van Der Waals and published by Courier Corporation. This book was released on 2004-01-01 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This much-cited thesis by J. D. van der Waals, the recipient of the 1910 Nobel Prize in physics, is accompanied by an introductory essay by J. S. Rowlinson and another work by van der Waals on the theory of liquid mixtures. 1988 edition.

Download or read book Properties of UO2 written by J. Belle and published by . This book was released on 1957 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical Vibration written by William John Palm and published by . This book was released on 2007 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: Model, analyze, and solve vibration problems, using modern computer tools. Featuring clear explanations, worked examples, applications, and modern computer tools, William Palm's Mechanical Vibration provides a firm foundation in vibratory systems. You'll learn how to apply knowledge of mathematics and science to model and analyze systems ranging from a single degree of freedom to complex systems with two and more degrees of freedom. Separate MATLAB sections at the end of most chapters show how to use the most recent features of this standard engineering tool, in the context of solving vibration problems. The text introduces Simulink where solutions may be difficult to program in MATLAB, such as modeling Coulomb friction effects and simulating systems that contain non-linearities. Ample problems throughout the text provide opportunities to practice identifying, formulating, and solving vibration problems. KEY FEATURES Strong pedagogical approach, including chapter objectives and summaries Extensive worked examples illustrating applications Numerous realistic homework problems Up-to-date MATLAB coverage The first vibration textbook to cover Simulink Self-contained introduction to MATLAB in Appendix A Special section dealing with active vibration control in sports equipment Special sections devoted to obtaining parameter values from experimental data

Download or read book Handbook of Continuum Mechanics written by Jean Salencon and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt: Outstanding approach to continuum mechanics. Its high mathematical level of teaching together with abstracts, summaries, boxes of essential formulae and numerous exercises with solutions, makes this handbook one of most complete books in the area. Students, lecturers, and practitioners will find this handbook a rich source for their studies or daily work.

Download or read book Applications of the Theory of Plasticity in Soil Mechanics written by Jean Salençon and published by John Wiley & Sons. This book was released on 1977 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Asphalt techniques written by and published by . This book was released on 1965 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Composite Materials written by It Meng Low and published by Elsevier. This book was released on 2021-06-18 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite materials have been well developed to meet the challenges of high-performing material properties targeting engineering and structural applications. The ability of composite materials to absorb stresses and dissipate strain energy is vastly superior to that of other materials such as polymers and ceramics, and thus they offer engineers many mechanical, thermal, chemical and damage-tolerance advantages with limited drawbacks such as brittleness. Composite Materials: Manufacturing, Properties and Applications presents a comprehensive review of current status and future directions, latest technologies and innovative work, challenges and opportunities for composite materials. The chapters present latest advances and comprehensive coverage of material types, design, fabrication, modelling, properties and applications from conventional composite materials to advanced composites such as nanocomposites, self-healing and smart composites. The book targets researchers in the field of advanced composite materials and ceramics, students of materials science and engineering at the postgraduate level, as well as material engineers and scientists working in industrial R& D sectors for composite material manufacturing. - Comprehensive coverage of material types, design, fabrication, modelling, properties and applications from conventional composite materials to advanced composites such as nanocomposites, self-healing and smart composites - Features latest advances in terms of mechanical properties and other material parameters which are essential for designers and engineers in the composite and composite reinforcement manufacturing industry, as well as all those with an academic research interest in the subject - Offers a good platform for end users to refer to the latest technologies and topics fitting into specific applications and specific methods to tackle manufacturing or material processing issues in relation to different types of composite materials