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Author :
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (317 download)
Download or read book A New Merit Function for Evaluating the Flaw Tolerance of Composite Laminates written by and published by . This book was released on 2000 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher :
ISBN 13 : 9781726154710
Total Pages : 46 pages
Book Rating : 4.1/5 (547 download)
Download or read book A New Merit Function for Evaluating the Flaw Tolerance of Composite Laminates. Part 2; Arbitrary Size Holes and Center Cracks written by National Aeronautics and Space Administration (NASA) and published by . This book was released on 2018-08-29 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a previous paper, a new merit function for determining the strength performance of flawed composite laminates was presented. This previous analysis was restricted to circular hole flaws that were large enough that failure could be predicted using the laminate stress concentration factor. In this paper, the merit function is expanded to include the flaw cases of an arbitrary size circular hole or center crack. Failure prediction for these cases is determined using the point stress criterion. An example application of the merit function is included for a wide range of graphite/epoxy laminates.Martin, Mikulas M., Jr. and Sumpter, RodLangley Research CenterSTRESS CONCENTRATION; LAMINATES; FAILURE ANALYSIS; HOLES (MECHANICS); NONDESTRUCTIVE TESTS; PREDICTIONS; DEFECTS; CRITERIA; CRACKS; GRAPHITE-EPOXY COMPOSITES...
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781723792403
Total Pages : 48 pages
Book Rating : 4.7/5 (924 download)
Download or read book A New Merit Function for Evaluating the Flaw Tolerance of Composite Laminates. Part 2; Arbitrary Size Holes and Center Cracks written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-18 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a previous paper, a new merit function for determining the strength performance of flawed composite laminates was presented. This previous analysis was restricted to circular hole flaws that were large enough that failure could be predicted using the laminate stress concentration factor. In this paper, the merit function is expanded to include the flaw cases of an arbitrary size circular hole or center crack. Failure prediction for these cases is determined using the point stress criterion. An example application of the merit function is included for a wide range of graphite/epoxy laminates.Martin, Mikulas M., Jr. and Sumpter, RodLangley Research CenterSTRESS CONCENTRATION; LAMINATES; FAILURE ANALYSIS; HOLES (MECHANICS); NONDESTRUCTIVE TESTS; PREDICTIONS; DEFECTS; CRITERIA; CRACKS; GRAPHITE-EPOXY COMPOSITES
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781720362555
Total Pages : 42 pages
Book Rating : 4.3/5 (625 download)
Download or read book A New Merit Function for Evaluating the Flaw Tolerance of Composite Laminates. Pt. 2; Arbitrary Size Holes and Center Cracks written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a previous paper, a new merit function for determining the strength performance of flawed composite laminates was presented. This previous analysis was restricted to circular hole flaws that were large enough that failure could be predicted using the laminate stress concentration factor. In this paper, the merit function is expanded to include the flaw cases of an arbitrary size circular hole or a center crack. Failure prediction for these cases is determined using the point stress criterion. An example application of the merit function is included for a wide range of graphite/epoxy laminates.Mikulas, Martin M., Jr. and Sumpter, RodLangley Research CenterFAILURE ANALYSIS; GRAPHITE-EPOXY COMPOSITES; LAMINATES; PREDICTIONS; HOLES (MECHANICS); STRESS CONCENTRATION; DEFECTS; CRITERIA; CRACKS
Author :
Publisher :
ISBN 13 :
Total Pages : 620 pages
Book Rating : 4.3/5 (243 download)
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2003 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722010232
Total Pages : 24 pages
Book Rating : 4.0/5 (12 download)
Download or read book A New Merit Function for Evaluating the Flaw Tolerance of Composite Laminates written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-28 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced composite materials are providing notable savings in numerous aerospace and non-aerospace applications by virtue of their uniquely high strength-to-density ratio and high stiffness-to-density ratio. However, their full potential for high performance has yet to be achieved because of the low tolerance of the 'brittle' material to impact, holes, flaws, and localized discontinuities due to relatively low toughness. In the present paper a new and simple merit function is proposed for maximizing the strength performance of flawed composite laminate for different design requirement. This new merit function takes into account the flaw tolerance of a composite laminated as well as its stiffness. After development of the new merit function, an example is presented of its application to a practical laminate family. Mikulas, Martin M., Jr. and Sumpter, Rod Unspecified Center NAG1-1642; RTOP 505-63-50-08...
Author : Mahmood M. Shokrieh
Publisher : Woodhead Publishing
ISBN 13 : 0857098594
Total Pages : 407 pages
Book Rating : 4.8/5 (57 download)
Download or read book Residual Stresses in Composite Materials written by Mahmood M. Shokrieh and published by Woodhead Publishing. This book was released on 2014-02-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Residual stresses are a common phenomenon in composite materials. They can either add to or significantly reduce material strength. Because of the increasing demand for high-strength, light-weight materials such as composites and their wide range of applications in the aerospace and automotive industries, in civil infrastructure and in sporting applications, it is critical that the residual stresses of composite materials are understood and measured correctly.The first part of this important book reviews destructive and non-destructive testing (NDT) techniques for measuring residual stresses. Various mathematical (analytical and numerical) methods for calculation of residual stresses in composite materials are also presented. Chapters in the first section of the book discuss the simulated hole drilling method, the slitting/crack compliance method, measuring residual stresses in homogeneous and composite glass materials using photoelastic techniques, and modeling residual stresses in composite materials. The second part of the book discusses residual stresses in polymer matrix, metal-matrix and a range of other types of composites. Moreover, the addition of nanoparticles to the matrix of polymeric composites as a new technique for reduction of residual stresses is discussed.Residual stresses in composite materials provides a comprehensive overview of this important topic, and is an invaluable reference text for both academics and professionals working in the mechanical engineering, civil engineering, aerospace, automotive, marine and sporting industries. - Reviews destructive and non-destructive testing (NDT) techniques for measuring residual stresses - Discusses residual stresses in polymer matrix, metal-matrix and other types of composite - Considers the addition of nanoparticles to the matrix of polymeric composites as a new technique for reduction of residual stresses
Author : Bernard J. Hamrock
Publisher : CRC Press
ISBN 13 : 1135537755
Total Pages : 747 pages
Book Rating : 4.1/5 (355 download)
Download or read book Fundamentals of Fluid Film Lubrication written by Bernard J. Hamrock and published by CRC Press. This book was released on 2004-03-15 with total page 747 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specifically focusing on fluid film, hydrodynamic, and elastohydrodynamic lubrication, this edition studies the most important principles of fluid film lubrication for the correct design of bearings, gears, and rolling operations, and for the prevention of friction and wear in engineering designs. It explains various theories, procedures, and equations for improved solutions to machining challenges. Providing more than 1120 display equations and an introductory section in each chapter, Fundamentals of Fluid Film Lubrication, Second Edition facilitates the analysis of any machine element that uses fluid film lubrication and strengthens understanding of critical design concepts.
Author : Edward M. Lenoe
Publisher : Springer Science & Business Media
ISBN 13 : 1468410334
Total Pages : 858 pages
Book Rating : 4.4/5 (684 download)
Download or read book Fibrous Composites in Structural Design written by Edward M. Lenoe and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fourth Conference on Fibrous Composites in Structural Design was a successor to the First-to-Third Conferences on Fibrous Composites in Flight Vehicle Design sponsored by the Air Force (First and Second Conferences, September 1973 and May 1974) and by NASA (Third Conference, November 1975) which were aimed at focusing national attention on flight vehicle applications of a new class of fiber reinforced materials, the advanced com posites, which afforded weight savings and other advantages which had not been previously available. The Fourth Conference, held at San Diego, California, 14-17 November 1978, was the fi rst of these conferences to be jointly sponsored by the Army, Navy and Ai r Force together with NASA, as well as being the first to give attention to non-aerospace applications of fiber reinforced composites. While the design technology for aerospace applications has reached a state of relative maturity, other areas of application such as mi litary bridging, flywheel energy storage systems, ship and surface vessel components and ground vehicle components are in an early stage of development, and it was an important objective to pinpoint where careful attention to structural design was needed in such applications to achfeve maximum structural performance payoff together with a high level of reliability and attractive economics.
Author : Robert C. Juvinall
Publisher : John Wiley & Sons
ISBN 13 : 1119723604
Total Pages : 805 pages
Book Rating : 4.1/5 (197 download)
Download or read book Fundamentals of Machine Component Design written by Robert C. Juvinall and published by John Wiley & Sons. This book was released on 2020-06-23 with total page 805 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Machine Component Design presents a thorough introduction to the concepts and methods essential to mechanical engineering design, analysis, and application. In-depth coverage of major topics, including free body diagrams, force flow concepts, failure theories, and fatigue design, are coupled with specific applications to bearings, springs, brakes, clutches, fasteners, and more for a real-world functional body of knowledge. Critical thinking and problem-solving skills are strengthened through a graphical procedural framework, enabling the effective identification of problems and clear presentation of solutions. Solidly focused on practical applications of fundamental theory, this text helps students develop the ability to conceptualize designs, interpret test results, and facilitate improvement. Clear presentation reinforces central ideas with multiple case studies, in-class exercises, homework problems, computer software data sets, and access to supplemental internet resources, while appendices provide extensive reference material on processing methods, joinability, failure modes, and material properties to aid student comprehension and encourage self-study.
Author : Marvin B. Dow
Publisher :
ISBN 13 :
Total Pages : 86 pages
Book Rating : 4.:/5 (11 download)
Download or read book Development of Stitched, Braided and Woven Composite Structures in the ACT Program and at Langley Research Center (1985 to 1997) written by Marvin B. Dow and published by . This book was released on 1997 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Swapan Kumar Ghosh
Publisher : John Wiley & Sons
ISBN 13 : 3527625380
Total Pages : 306 pages
Book Rating : 4.5/5 (276 download)
Download or read book Self-healing Materials written by Swapan Kumar Ghosh and published by John Wiley & Sons. This book was released on 2009-08-04 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book covers self-healing concepts for all important material classes and their applications: polymers, ceramics, non-metallic and metallic coatings, alloys, nanocomposites, concretes and cements, as well as ionomers. Beginning with the inspiration from biological self-healing, its mimickry and conceptual transfer into approaches for the self-repair of artificially created materials, this book explains the strategies and mechanisms for the readers' basic understanding, then covers the different material classes and suitable self-healing concepts, giving examples for their application in practical situations. As the first book in this swiftly growing research field, it is of great interest to readers from many scientific and engineering disciplines, such as physics and chemistry, civil, architectural, mechanical, electronics and aerospace engineering.
Author : John B. Wachtman
Publisher : John Wiley & Sons
ISBN 13 : 9780470451502
Total Pages : 496 pages
Book Rating : 4.4/5 (515 download)
Download or read book Mechanical Properties of Ceramics written by John B. Wachtman and published by John Wiley & Sons. This book was released on 2009-08-13 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Comprehensive and Self-Contained Treatment of the Theory and Practical Applications of Ceramic Materials When failure occurs in ceramic materials, it is often catastrophic, instantaneous, and total. Now in its Second Edition, this important book arms readers with a thorough and accurate understanding of the causes of these failures and how to design ceramics for failure avoidance. It systematically covers: Stress and strain Types of mechanical behavior Strength of defect-free solids Linear elastic fracture mechanics Measurements of elasticity, strength, and fracture toughness Subcritical crack propagation Toughening mechanisms in ceramics Effects of microstructure on toughness and strength Cyclic fatigue of ceramics Thermal stress and thermal shock in ceramics Fractography Dislocation and plastic deformation in ceramics Creep and superplasticity of ceramics Creep rupture at high temperatures and safe life design Hardness and wear And more While maintaining the first edition's reputation for being an indispensable professional resource, this new edition has been updated with sketches, explanations, figures, tables, summaries, and problem sets to make it more student-friendly as a textbook in undergraduate and graduate courses on the mechanical properties of ceramics.
Author : Biliyar N. Bhat
Publisher :
ISBN 13 : 9781624104886
Total Pages : 0 pages
Book Rating : 4.1/5 (48 download)
Download or read book Aerospace Materials and Applications written by Biliyar N. Bhat and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The present volume is focused on documenting the novel processing, fabrication, characterization, and testing approaches that are unique to aerospace materials/structures/systems"--Preface.
Author : Bertrand Lavédrine
Publisher : Getty Publications
ISBN 13 : 9780892367016
Total Pages : 304 pages
Book Rating : 4.3/5 (67 download)
Download or read book A Guide to the Preventive Conservation of Photograph Collections written by Bertrand Lavédrine and published by Getty Publications. This book was released on 2003 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: A resource for the photographic conservator, conservation scientist, curator, as well as professional collector, this volume synthesizes both the masses of research that has been completed to date and the international standards that have been established on the subject.
Author : George C. Sih
Publisher : Springer Science & Business Media
ISBN 13 : 9400961529
Total Pages : 289 pages
Book Rating : 4.4/5 (9 download)
Download or read book Fracture mechanics of concrete: Structural application and numerical calculation written by George C. Sih and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete has traditionally been known as a material used widely in the construction of roads, bridges and buildings. Since cost effectiveness has always been one of the more important aspects of design, concrete, when reinforced and/or prestressed, is finding more use in other areas of application such as floating marine structures, storage tanks, nuclear vessel containments and a host of other structures. Because of the demand for concrete to operate under different loading and environmen tal conditions, increasing attention has been paid to study concrete specimens and structure behavior. A subject of major concern is how the localized segregation of the constituents in concrete would affect its global behavior. The degree of nonhomogeneity due to material property and damage. by yielding and/or cracking depends on the size scale and loading rate under consideration. Segregation or clustering of aggregates at the macroscopic level will affect specimen behavior to a larger degree than it would to a large structure such as a dam. Hence, a knowledge of concrete behavior over a wide range of scale is desired. The parameters governing micro-and macro-cracking and the techniques for evaluating and observing the damage in concrete need to be better understood. This volume is intended to be an attempt in this direction. The application of Linear Elastic Fracture Mechanics to concrete is discussed in several of the chapters.
Author : W. A. Wagner
Publisher :
ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.:/5 (317 download)
Download or read book Liquid Rocket Metal Tanks and Tank Components written by W. A. Wagner and published by . This book was released on 1974 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
