Download or read book Mod lisation du comportement global en sollicitations quasi statiques d un composite stratifie verre epoxy written by Frédéric Thiebaud and published by . This book was released on 1994 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objectif de cette étude est le développement et la validation d'un modèle de comportement mécanique multiaxial pour une structure en matériau composite soumise a des sollicitations quasi-statiques. Le matériau étudie est un stratifie verre-epoxy +55, -55#3 de forme tubulaire fabrique par enroulement filamentaire. On présente tout d'abord les différents moyens expérimentaux qui ont permis une mise en condition optimale des essais. L'étude phenomenologique regroupe notamment des essais de chargements répètes progressifs, de fluage et de relaxation en traction pression interne. La modélisation repose sur la partition de la déformation totale en une déformation de type classique (comportement viscoélastique endommageable) et en une déformation liée a la stratification qui impose la définition d'un critère de limite élastique et l'écriture de lois d'écoulement particulières. L'idée principale de ce modèle est de considérer le stratifie comme un matériau homogène équivalent et d'obtenir ainsi une loi de comportement global. Son originalité réside dans la prise en compte d'un comportement élastique et endommageable dans la direction de renforcement. La comparaison des simulations numériques et des données expérimentales pour des essais de traction, pression interne pure et de pression interne avec effet de fond permet d'apprécier la bonne fiabilité du modèle. Ce travail appartient a un ensemble de recherches dont le but final est d'obtenir une idée synthétique du comportement du stratifie nécessaire au calcul de structures
Download or read book La Recherche A rospatiale written by and published by . This book was released on 1995 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mod lisation du comportement plastique endommag d un unidirectionnel et application au calcul des stratifi s written by Bruno Muzic and published by . This book was released on 1995 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objet du présent travail est l'étude du comportement des matériaux composites stratifiés constitués d'un empilement de couches composées de résine époxy renforcée par des fibres de verre unidirectionnelles. L'ensemble de ces travaux nécessite l'analyse de nombreuses données expérimentales qui requièrent souvent la réalisation d'essais mécaniques multiaxiaux. Nous présentons au chapitre 1 les différents dispositifs expérimentaux utilisés lors de l'étude, notamment un montage permettant des sollicitations de traction-torsion-pression interne sur éprouvettes tubulaires. Nous traitons, au chapitre 2, le problème de la représentativité des éprouvettes. Afin de déterminer les limites de similitudes de comportement entre éprouvettes et structures, une série de tests comparatifs est effectuée sur une palette d'échantillons dont les formes géométriques diffèrent (éprouvettes plates, tubulaires, diamètres et épaisseurs variables). Les résultats obtenus sont ensuite analysés et discutés. Les deux derniers chapitres sont consacrés à la partie modélisation de notre travail. Dans un premier temps, nous établissons un modèle de comportement plastique endommagé d'une couche au sein d'un stratifié pour des sollicitations quasi-statiques. Dans un deuxième temps, nous accédons au comportement du stratifié à l'aide de méthodes numériques appropriées. Ces techniques permettent l'extension de la Théorie Classique des Stratifiés au domaine plastique endommagé. Finalement, après avoir exposé la méthodologie d'identificatlon des paramètres du modèle, nous aboutissons à des simulations numérlques très satisfaisantes.
Download or read book Composite Materials written by Jean-Marie Berthelot and published by Springer. This book was released on 2013-02-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical engineering, an engineering discipline borne of the needs of the in dustrial revolution, is once again asked to do its substantial share in the call for industrial renewal. The general call is urgent as we face profound issues of produc tivity and competitiveness that require engineering solutions, among others. The Mechanical Engineering Series features graduate texts and research monographs intended to address the need for information in contemporary areas of mechanical engineering. The series is conceived as a comprehensive one that covers a broad range of concentrations important to mechanical engineering graduate education and re search. We are fortunate to have a distinguished roster of consulting editors on the advisory board, each an expert in one of the areas of concentration. The names of the consulting editors are listed on the next page of this volume. The areas of concentration are applied mechanics, biomechanics, computational mechan ics, dynamic systems and control, energetics, mechanics of materials, processing, thermal science, and tribology.
Download or read book Non Crimp Fabric Composites written by Stepan V Lomov and published by Elsevier. This book was released on 2011-04-19 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-crimp fabric (NCF) composites are reinforced with mats of straight (non-crimped) fibres, giving them such advantages as strength, ease of handling and low manufacturing costs. Non-crimp fabric composites provides a comprehensive review of the use of NCF composites, their manufacture and applications in engineering.Part one covers the manufacture of non-crimp fabrics, including also topics such as structural stitching and automated defect analysis. Part two goes on to discuss the manufacture of non-crimp fabric composites, with chapters covering such topics as deformability and permeability of NCF. Part three focuses on the properties of NCF composites, with chapters on stiffness and strength, damage progression and fatigue. Finally, part four covers the applications of NCF composites, including chapters on the aerospace and automotive industries as well as wind turbines and helicopter applications. The book concludes with a discussion of cost analysis of NCF composites in engineering applications.With its distinguished editor and international team of expert contributors, Non-crimp fabric composites is an essential reference for composite manufacturers and structural and mechanical engineers in industries using NCF composites, as well as academics with a research interest in the field. - Provides a comprehensive review of the use of NCF composites, their manufacture and applications in engineering - Reviews the manufacture of non-crimp fabrics, including also topics such as structural stitching and automated defect analysis - Examines the properties of NCF composites considering stiffness and strength, damage progression and fatigue
Download or read book Mechanical Identification of Composites written by A. Vautrin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Behavior of Materials Volume 1 written by Bo Song and published by Springer. This book was released on 2015-10-23 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic Behavior of Materials, Volume 1 represents the first of nine volumes of technical papers presented at the Society for Experimental Mechanics SEM 15th International Congress & Exposition on Experimental and Applied Mechanics, held at Costa Mesa, California, June 8-11, 2015. The full set of proceedings also includes volumes on: Challenges in Mechanics of Time Dependent Materials, Advancement of Optical Methods in Experimental Mechanics, Experimental and Applied Mechanics 16th International Symposium on MEMS and Nanotechnology, 5th International Symposium on the Mechanics of Biological Systems and Materials, International Symposium on the Mechanics of Composite and Multi-functional Materials, Fracture, Fatigue, Failure and Damage Evolution; and Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems.
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.
Download or read book Advanced Composite Materials and Structures written by Mohamed Thariq Hameed Sultan and published by CRC Press. This book was released on 2022-08-31 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book bridges the gap between theoretical concepts and their implementations, especially for the high-performance structures/components related to advanced composite materials. This work focuses on the prediction of various structural responses such as deformations, natural frequencies etc. of advanced composites under complex environments and/or loading conditions. In addition, it discusses micro-mechanical material modeling of various advanced composite materials that involve different structures ranging from basic to advanced, such as beams, flat and curved panels, shells, skewed, corrugated, and other materials, as well as various solution techniques via analytical, semi-analytical, and numerical approaches. This book: Covers micro-mechanical material modeling of advanced composite materials Describes constitutive models of different composite materials and kinematic models of different structural configuration Discusses pertinent analytical, semi-analytical, and numerical techniques Focusses on structural responses relating to deformations, natural frequencies, and critical loads under complex environments Presents actual demonstrations of theoretical concepts as applied to real examples using Ansys APDL scripts This book is aimed at researchers, professionals, and graduate students in mechanical engineering, material science, material engineering, structural engineering, aerospace engineering, and composite materials.
Download or read book Titanium Matrix Composites written by Shankar Mall and published by CRC Press. This book was released on 2020-01-29 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review and summary of advancements related to mechanical behavior and related mechanics issues of titanium matrix composites (TMCs), a class of high-temperature materials useful in the propulsion and airframe components in advanced aerospace systems. After an introduction to TMCs, different authors review and summarise the advancements related to mechanical behavior and related mechanics issues of TMCs.
Download or read book The Virtual Crack Closure Technique History Approach and Applications written by Ronald Krueger and published by . This book was released on 2002 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of the virtual crack closure technique is presented. The approach used is discussed, the history summarized, and insight into its applications provided. Equations for two-dimensional quadrilateral elements with linear and quadratic shape functions are given. Formula for applying the technique in conjuction with three-dimensional solid elements as well as plate/shell elements are also provided. Necessary modifications for the use of the method with geometrically nonlinear finite element analysis and corrections required for elements at the crack tip with different lengths and widths are discussed. The problems associated with cracks or delaminations propagating between different materials are mentioned briefly, as well as a strategy to minimize these problems. Due to an increased interest in using a fracture mechanics based approach to assess the damage tolerance of composite structures in the design phase and during certification, the engineering problems selected as examples and given as references focus on the application of the technique to components made of composite materials.
Download or read book Failure Analysis and Prevention written by Aidy Ali and published by BoD – Books on Demand. This book was released on 2017-12-20 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers recent advancement methods used in analysing the root cause of engineering failures and the proactive suggestion for future failure prevention. The techniques used especially non-destructive testing such X-ray are well described. The failure analysis covers materials for metal and composites for various applications in mechanical, civil and electrical applications. The modes of failures that are well explained include fracture, fatigue, corrosion and high-temperature failure mechanisms. The administrative part of failures is also presented in the chapter of failure rate analysis. The book will bring you on a tour on how to apply mechanical, electrical and civil engineering fundamental concepts and to understand the prediction of root cause of failures. The topics explained comprehensively the reliable test that one should perform in order to investigate the cause of machines, component or material failures at the macroscopic and microscopic level. I hope the material is not too theoretical and you find the case study, the analysis will assist you in tackling your own failure investigation case.
Download or read book Damage and Fracture of Composite Materials and Structures written by Mohd Nasir Tamin and published by Springer Science & Business Media. This book was released on 2012-01-03 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph presents recent research findings on fracture properties and behavior of the composites, and their damage and cracking process under both quasi-static and impact loading conditions. Theoretical treatment, experimental investigation and numerical simulation aspects of the mechanics of composites, including sandwich structures are included.
Download or read book Damage and Fracture Mechanics written by Taoufik Boukharouba and published by Springer Science & Business Media. This book was released on 2009-08-09 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: The First African InterQuadrennial ICF Conference “AIQ-ICF2008” on Damage and Fracture Mechanics – Failure Analysis of Engineering Materials and Structures”, Algiers, Algeria, June 1–5, 2008 is the first in the series of InterQuadrennial Conferences on Fracture to be held in the continent of Africa. During the conference, African researchers have shown that they merit a strong reputation in international circles and continue to make substantial contributions to the field of fracture mechanics. As in most countries, the research effort in Africa is und- taken at the industrial, academic, private sector and governmental levels, and covers the whole spectrum of fracture and fatigue. The AIQ-ICF2008 has brought together researchers and engineers to review and discuss advances in the development of methods and approaches on Damage and Fracture Mechanics. By bringing together the leading international experts in the field, AIQ-ICF promotes technology transfer and provides a forum for industry and researchers of the host nation to present their accomplishments and to develop new ideas at the highest level. International Conferences have an important role to play in the technology transfer process, especially in terms of the relationships to be established between the participants and the informal exchange of ideas that this ICF offers.
