Download or read book Fatigue Crack and Delamination Growth in Fibre Metal Laminates Under Variable Amplitude Loading written by Sharifullah Khan and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue and Fracture of Fibre Metal Laminates written by René Alderliesten and published by Springer. This book was released on 2017-04-19 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contributes to the field of hybrid technology, describing the current state of knowledge concerning the hybrid material concept of laminated metallic and composite sheets for primary aeronautical structural applications. It is the only book to date on fatigue and fracture of fibre metal laminates (FMLs). The first section of the book provides a general background of the FML technology, highlighting the major FML types developed and studied over the past decades in conjunction with an overview of industrial developments based on filed patents. In turn, the second section discusses the mechanical response to quasi-static loading, together with the fracture phenomena during quasi-static and cyclic loading. To consider the durability aspects related to strength justification and certification of primary aircraft structures, the third section discusses thermal aspects related to FMLs and their mechanical response to various environmental and acoustic conditions.
Download or read book On Subsurface Crack Growth in Fibre Metal Laminate Materials written by and published by . This book was released on 2003 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack growth in fibre metal laminates (FMLs) is significantly more complex than in monolithic materials due to the interaction of various physical mechanisms that govern the growth of cracks in laminates. Extensive research has gone into the development of analytical models that try to predict the growth of surface and through-cracks in the FML Glare under fatigue loading. To date, less emphasis has been placed on developing fatigue crack growth models for part through cracks. These part through cracks exhibit different rates of growth for each layer of the laminate based upon differing stress levels and delamination zone sizes. To better predict the residual strength of FML structures, understanding the behavior of subsurface crack growth is required. For this reason, data of crack growth rates for layers of various laminates were compared to an analytical fatigue crack growth model developed for surface cracks in a specific type of FML, Glare. This paper gives an initial assessment of the model's veracity for subsurface crack growth.
Download or read book Fatigue Crack Propagation and Delamination Growth in Glare written by R. Alderliesten and published by Delft University Press. This book was released on 2005-01-01 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue of Structures and Materials written by J. Schijve and published by Springer Science & Business Media. This book was released on 2008-12-16 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue of structures and materials covers a wide scope of different topics. The purpose of the present book is to explain these topics, to indicate how they can be analyzed, and how this can contribute to the designing of fatigue resistant structures and to prevent structural fatigue problems in service. Chapter 1 gives a general survey of the topic with brief comments on the signi?cance of the aspects involved. This serves as a kind of a program for the following chapters. The central issues in this book are predictions of fatigue properties and designing against fatigue. These objectives cannot be realized without a physical and mechanical understanding of all relevant conditions. In Chapter 2 the book starts with basic concepts of what happens in the material of a structure under cyclic loads. It illustrates the large number of variables which can affect fatigue properties and it provides the essential background knowledge for subsequent chapters. Different subjects are presented in the following main parts: • Basic chapters on fatigue properties and predictions (Chapters 2–8) • Load spectra and fatigue under variable-amplitude loading (Chapters 9–11) • Fatigue tests and scatter (Chapters 12 and 13) • Special fatigue conditions (Chapters 14–17) • Fatigue of joints and structures (Chapters 18–20) • Fiber-metal laminates (Chapter 21) Each chapter presents a discussion of a speci?c subject.
Download or read book Composite Joints and Connections written by P Camanho and published by Elsevier. This book was released on 2011-10-12 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: The growing use of composites over metals for structural applications has made a thorough understanding of the behaviour of composite joints in various applications essential for engineers, but has also presented them with a new set of problems. Composite joints and connections addresses these differences and explores the design, modelling and testing of bonded and bolted joints and connections. Part one discusses bolted joints whilst part two examines bonded joints. Chapters review reinforcement techniques and applications for composite bolted and bonded joints and investigate the causes and effects of fatigue and stress on both types of joint in various applications and environments. Topics in part one include metal hybridization, glass-reinforced aluminium (GLARE), hybrid fibre metal laminates (FML), glass fibre reinforced polymer (GFRP) and carbon fibre reinforced polymer (CFRP) composites. Topics in part two include calculation of strain energy release rates, simulating fracture and fatigue failure using cohesive zone models, marine and aerospace applications, advanced modelling, stress analysis of bonded patches and scarf repairs. Composite joints and connections is a valuable reference for composite manufacturers and composite component fabricators, the aerospace, automotive, shipbuilding and civil engineering industries and for anyone involved in the joining and repair of composite structures. Explores the design, modelling and testing of bonded and bolted joints and connections Reviews reinforcement techniques and applications for composite bolted and bonded joints Investigates the causes and effects of fatigue and stress on bolted and bonded joints in various applications and environments
Download or read book Dynamic Deformation Damage and Fracture in Composite Materials and Structures written by Vadim Silberschmidt and published by Woodhead Publishing. This book was released on 2016-01-23 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite materials, with their higher exposure to dynamic loads, have increasingly been used in aerospace, naval, automotive, sports and other sectors over the last few decades. Dynamic Deformation, Damage and Fracture in Composite Materials and Structures reviews various aspects of dynamic deformation, damage and fracture, mostly in composite laminates and sandwich structures, in a broad range of application fields including aerospace, automotive, defense and sports engineering. As the mechanical behavior and performance of composites varies under different dynamic loading regimes and velocities, the book is divided into sections that examine the different loading regimes and velocities. Part one examine low-velocity loading and part two looks at high-velocity loading. Part three then assesses shock and blast (i.e. contactless) events and the final part focuses on impact (contact) events. As sports applications of composites are linked to a specific subset of dynamic loading regimes, these applications are reviewed in the final part. Examines dynamic deformation and fracture of composite materials Covers experimental, analytical and numerical aspects Addresses important application areas such as aerospace, automotive, wind energy and defence, with a special section on sport applications
Download or read book Fatigue Crack Growth in Fiber Metal Laminates written by Per Hofslagare and published by . This book was released on 2004 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ICAF 2009 Bridging the Gap between Theory and Operational Practice written by M. Bos and published by Springer Science & Business Media. This book was released on 2009-05-24 with total page 1340 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 31st Conference and the 25th Symposium of the International Committee on Aeronautical Fatigue will be hosted in Rotterdam, The Netherlands, by the National Aerospace Laboratory NLR, under the auspices of the Netherlands Association of Aeronautical Engineers NVvL, the Technical University of Delft and Stork Fokker AESP B.V. These Proceedings will consist of reviews of aeronautical fatigue activities presented by the national delegates of the 14 member nations of ICAF. It will also contain specialist papers presented by international authors with design, manufacturing, airworthiness regulations, operations and research backgrounds. The papers will be based on the theme “Bridging the gap between theory and operational practice”.
Download or read book Predicting Interlaminar Fatigue Crack Growth Rates in Compressively Loaded Laminates written by AJ. Russell and published by . This book was released on 1989 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fatigue crack growth rates of delaminations under mixed mode (I and II) loading conditions were investigated. Double cracked-lap-shear specimens were used to obtain da/dN versus ?G data for AS4/3501-6 graphite/epoxy. This, together with previously reported results for pure mode I and mode II made it possible to establish a mixed mode fatigue criterion. The validity of these findings was then tested by using them to predict the growth rates of through-the-width delaminations in laminates subject to constant amplitude compressive loadings. Symmetric honeycomb sandwich specimens with delaminations located at a depth of four, six, eight, or ten plies beneath the surface were loaded in compression at 2.5 Hz, and the fatigue crack growth rates were determined. The experimental results were generally in good agreement with the predicted behavior although fiber bridging and load-induced crack closure resulted in predicted rates being too high in some cases.
Download or read book Mechanical and Physical Testing of Biocomposites Fibre Reinforced Composites and Hybrid Composites written by Mohammad Jawaid and published by Woodhead Publishing. This book was released on 2018-09-14 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical and Physical Testing of Biocomposites, Fibre-Reinforced Composites and Hybrid Composites covers key aspects of fracture and failure in natural/synthetic fiber reinforced polymer based composite materials, ranging from crack propagation, to crack growth, and from notch-size effect, to damage-tolerant design. Topics of interest include mechanical properties, such as tensile, flexural, compression, shear, impact, fracture toughness, low and high velocity impact, and anti-ballistic properties of natural fiber, synthetic fibers and hybrid composites materials. It also covers physical properties, such as density, water absorption, thickness swelling, and void content of composite materials fabricated from natural or synthetic materials. Written by leading experts in the field, and covering composite materials developed from different natural fibers and their hybridization with synthetic fibers, the book's chapters provide cutting-edge, up-to-date research on the characterization, analysis and modelling of composite materials. Contains contributions from leading experts in the field Discusses recent progress on failure analysis, SHM, durability, life prediction and the modelling of damage in natural fiber-based composite materials Covers experimental, analytical and numerical analysis Provides detailed and comprehensive information on mechanical properties, testing methods and modelling techniques
Download or read book Hybrid Polymer Composite Materials written by Vijay Kumar Thakur and published by Woodhead Publishing. This book was released on 2017-06-03 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid Polymer Composite Materials: Properties and Characterisation presents the latest on these composite materials that can best be described as materials that are comprised of synthetic polymers and biological/inorganic/organic derived constituents. The combination of unique properties that emerge as a consequence of the particular arrangement and interactions between the different constituents provides immense opportunities for advanced material technologies. This series of four volumes brings an interdisciplinary effort to accomplish a more detailed understanding of the interplay between synthesis, structure, characterization, processing, applications, and performance of these advanced materials, with this volume focusing on their properties and characterization. Provides a clear understanding of the present state-of-the-art and the growing utility of hybrid polymer composite materials Includes contributions from world renowned experts and discusses the combination of different kinds of materials procured from diverse resources Discusses their synthesis, chemistry, processing, fundamental properties, and applications Provides insights on the potential of hybrid polymer composite materials for advanced applications
Download or read book Fatigue Damage Development in Notched 02 45 s Laminates written by N. Chinatambi and published by . This book was released on 1989 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates delamination growth from holes in carbon fibre reinforced epoxy (CFRE) AS/3501-6 (02/±45)s laminates under tensile static and fatigue loading. Delaminations grow in a direction parallel to the loading at the 0/45 and 45/-45 interfaces. Attempts to control the location of the delamination by using inserts were unsuccessful. The delamination growth rates were fitted by a power function of the stress amplitude and mean stress. The stress amplitude is the dominant parameter. Tests were performed on dry and saturated specimens at room temperature, and there was no measurable difference in growth rates. However, block loading tests, where an overload was applied at regular intervals, resulted in growth rates five times higher than a linear sum of the individual growth rates. Compliance changes were measured and correlated with the extent of delamination. The associated matrix cracking contributes substantially to the compliance changes. The amount of matrix cracking for a given delamination length is a function of the type and level of loading. The results are interpreted in terms of the total strain energy release rate, G. Once the presence of matrix cracking is allowed for, there is reasonable agreement with results in the literature.
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 Delamination Crack Growth in Unidirectional Fiber Reinforced Composites Under Static and Cyclic Loading written by SS. Wang and published by . This book was released on 1979 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Delamination crack growth in a unidirectional composite laminate under static and fatigue loading conditions is investigated. An experimental program was performed to elucidate failure mechanisms and to characterize the growth rate of the delamination crack. Analytical modeling, based on microscopic observation, is conducted by using an advanced singular finite element method of the hybrid-stress model formulated through the minimum complementary energy principle. Solutions obtained from the analysis probe the fundamental nature of the problem. Implications of the results on the applicability of the classical laminate theory are discussed. Using a mixed-mode failure criterion, the delamination growth under a monotonically increasing load may be predicted satisfactorily. The rate of delamination crack propagation under fatigue loading is found to be related directly to the amplitudes of cyclic opening and shearing mode stress intensity factors by a power law relationship. The study elucidates many salient features of the problem, provides insight to the basic nature of the delamination failure behavior, and should be of practical importance in the design and testing of composite materials.
Download or read book Effect of Fiber Reinforcement on Fatigue Crack Growth in Fiber Metal Laminates written by Per Hofslagare and published by . This book was released on 2002 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Crack Growth Prediction for Generalized Fiber Metal Laminates and Hybrid Materials written by Gregory Scott Wilson and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
