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Author : Young Sig Kwon
Publisher :
ISBN 13 :
Total Pages : 342 pages
Book Rating : 4.:/5 (251 download)
Download or read book Indentation-flexure Damage in Graphite/epoxy Laminates written by Young Sig Kwon and published by . This book was released on 1991 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Adm Nasa
Publisher :
ISBN 13 : 9781731539595
Total Pages : 176 pages
Book Rating : 4.5/5 (395 download)
Download or read book Indentation-Flexure and Low-Velocity Impact Damage in Graphite/Epoxy Laminates written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-22 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Static indentation and low velocity impact tests were performed on quasi-isotropic and cross ply graphite/epoxy composite laminates. The load deflection relations in static tests and impact force history in the impact tests were recorded. The damage was assessed by using ultrasonic C-scanning and photomicrographic techniques. The static behavior of the laminates and damage progression during loading, unloading, and reloading were explained by a simple plate delamination model. A good correlation existed between the static and impact responses. It was found that results from a few static indentation-flexture tests can be used to predict the response and damage in composite laminates due to a class of low velocity impact events. Kwon, Young S. and Sankar, Bhavani V. GRAPHITE-EPOXY COMPOSITES; IMPACT DAMAGE; IMPACT TESTS; INDENTATION; LOW SPEED; MATHEMATICAL MODELS; STATIC TESTS; DELAMINATING; LAMINATES; MECHANICAL PROPERTIES; NONDESTRUCTIVE TESTS; PHOTOMICROGRAPHS; STRAIN ENERGY RELEASE RATE; ULTRASONIC FLAW DETECTION...
Author :
Publisher :
ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.:/5 (317 download)
Download or read book Indentation-flexure and Low-velocity Impact Damage in Graphite/epoxy Laminates written by and published by . This book was released on 1992 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : YS. Kwon
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (125 download)
Download or read book Indentation-Flexure and Low-Velocity Impact Damage in Graphite Epoxy Laminates written by YS. Kwon and published by . This book was released on 1993 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Static indentation-flexure and low-velocity impact tests were performed on quasi-isotropic and cross-ply graphite/epoxy composite laminates. The load-deflection relations in static tests and impact force history in impact tests were recorded. The damage was assessed by using ultrasonic C-scanning and photo-micrographic techniques. Some features of the static behavior were explained by simple analytical models. A good correlation existed between the load-deflection curves for static and impact loading. It was found that results from a few static indentation-flexure tests can be used to predict the impact force history and delamination radius in composite laminates due to low-velocity impact.
Author : Stephen Andrew Thomas
Publisher :
ISBN 13 :
Total Pages : 389 pages
Book Rating : 4.:/5 (31 download)
Download or read book Effects of Structural Parameters on the Static Indentation and Bending Behavior of Graphite/epoxy Laminates written by Stephen Andrew Thomas and published by . This book was released on 1993 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of different structural parameters on the indentation and bending behavior of laminated plates was investigated through a nonlinear analysis and static indentation experiments using rigid backface support and clamped-clamped boundary conditions, and specimens with six different spans between 32 and 508 mm in the clamped-clamped condition. The specimens were graphite/epoxy laminates in a [±452/02]s layup made from Hercules AS4/3501-6 tape prepreg. The laminates were loaded at their geometrical center with a 12.7 mm hemispherical indentor, while recording force, deflection, indentation and strain data. The damage in the specimens was evaluated using X-ray photography and cross-sectioning. A nonlinear analysis of the bending of the plates was developed using nonlinear strain-displacement relations, laminated plate theory, and the Rayleigh-Ritz method to produce a set of nonlinear equations to be solved using the Newton-Raphson method. The indentation behavior of the plates was influenced by structural parameters as indentations were seen to be different at a given force level depending on the boundary condition and possibly, the span. A comparison between previous impact results and the static tests, for the same structural parameters, showed that static force deflection behavior for the two boundary conditions tested bounds the behavior in the impact tests and that membrane effects are important in both impact and static events. The membrane behavior was observed to become more dominant for larger spans and at increased force levels. The analytical force-deflection and force-extensional strain curves fit the experimental data well using a fitting parameter which accounts for the flexibility of the in-plane boundary conditions. The initial damage in the specimens consists of matrix cracks near the backface of the specimens. These are accompanied by delaminations at higher force levels, which increase in extent toward the lower face of the laminate. The specimens tested with a rigid support show no damage (to loads of 1479 N) while the specimens tested with a clamped-clamped support show a progression of damage for the same forces tested, initiating between 507 N and 549 N, but with no variation with total span. Using force as the parameter for comparison, the type and through-thickness location of the damage are similar for both impact and static tests, but the overall extent of the damage is smaller for statically loaded specimens.
Author : M.S. Found
Publisher : Routledge
ISBN 13 : 1351449184
Total Pages : 174 pages
Book Rating : 4.3/5 (514 download)
Download or read book Experimental Techniques and Design in Composite Materials written by M.S. Found and published by Routledge. This book was released on 2017-11-22 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the revised versions of papers presented at the 4th Seminar on Experimental Techniques and Design in Composite Materials. The papers have been divided into five sections: fatigue, test methods, design, impact and modelling.
Author : S.R. Reid
Publisher : CRC Press
ISBN 13 : 9780849308475
Total Pages : 328 pages
Book Rating : 4.3/5 (84 download)
Download or read book Impact Behaviour of Fibre-reinforced Composite Materials and Structures written by S.R. Reid and published by CRC Press. This book was released on 2000-10-31 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much of the early, pioneering work on the properties of composites under impact is still conceptually relevant, yet the results of many such analyses are outdated. The accuracy of these results depend specifically on the materials used (fibre, resin), interface, and method of fabrication. Development of new materials, cost effective design, and analysis and prediction of structural behaviour have all established a need for timely, wide ranging research on impact behaviour. Impact Behaviour of Fibre-Reinforced Composite Materials and Structures brings together - for the first time - state-of-the-art research from the most recent works of leading, international experts. An important new study, this book extensively investigates impact response, damage tolerance, and failure of fibre-reinforced composite materials and structure, from a number of expert viewpoints. This book explores the nature of modern polymer composites based on glass, carbon, aramid, ceramic and polymer fibres in a polymer matrix, and details various ways of analysing the impact process. Impact Behaviour of Fibre-Reinforced Composite Materials and Structures will prove itself a valuable tool for research and development engineers, structural engineers, materials scientists, designers, and students and researchers of related disciplines.
Author :
Publisher :
ISBN 13 :
Total Pages : 652 pages
Book Rating : 4.:/5 (319 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author : Kishore V. Pochiraju
Publisher : Springer Science & Business Media
ISBN 13 : 1441993088
Total Pages : 681 pages
Book Rating : 4.4/5 (419 download)
Download or read book Long-Term Durability of Polymeric Matrix Composites written by Kishore V. Pochiraju and published by Springer Science & Business Media. This book was released on 2011-09-25 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-Term Durability of Polymeric Matrix Composites presents a comprehensive knowledge-set of matrix, fiber and interphase behavior under long-term aging conditions, theoretical modeling and experimental methods. This book covers long-term constituent behavior, predictive methodologies, experimental validation and design practice. Readers will also find a discussion of various applications, including aging air craft structures, aging civil infrastructure, in addition to engines and high temperature applications.
Author : Amer Society Composi
Publisher : CRC Press
ISBN 13 : 9781566762205
Total Pages : 1338 pages
Book Rating : 4.7/5 (622 download)
Download or read book American Society of Composites, Ninth International Conference Proceedings written by Amer Society Composi and published by CRC Press. This book was released on 1994-09-23 with total page 1338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles Bakis
Publisher : DEStech Publications, Inc
ISBN 13 : 1605951072
Total Pages : 1892 pages
Book Rating : 4.6/5 (59 download)
Download or read book American Society of Composites-28th Technical Conference written by Charles Bakis and published by DEStech Publications, Inc. This book was released on 2013-11-01 with total page 1892 pages. Available in PDF, EPUB and Kindle. Book excerpt: New and unpublished U.S. and international research on multifunctional, active, biobased, SHM, self-healing composites -- from nanolevel to large structures New information on modeling, design, computational engineering, manufacturing, testing Applications to aircraft, bridges, concrete, medicine, body armor, wind energy This fully searchable CD-ROM contains 135 original research papers on all phases of composite materials. The document provides cutting edge research by US, Canadian, and Japanese authorities on matrix-based and fiber composites from design to damage analysis and detection. Major divisions of the work include: Structural Health Monitoring, Multifunctional Composites, Integrated Computational Materials Engineering, Interlaminar Testing, Analysis-Shell Structures, Thermoplastic Matrices, Analysis Non-classical Laminates, Bio-Based Composites, Electrical Properties, Dynamic Behavior, Damage/Failure, Compression-Testing, Active Composites, 3D Reinforcement, Dielectric Nanocomposites, Micromechanical Analysis, Processing, CM Reinforcement for Concrete, Environmental Effects, Phase-Transforming, Molecular Modeling, Impact.
Author :
Publisher :
ISBN 13 :
Total Pages : 368 pages
Book Rating : 4.:/5 (317 download)
Download or read book Computational Methods for Failure Analysis and Life Prediction written by and published by . This book was released on 1993 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lucas P. Durand
Publisher : Nova Publishers
ISBN 13 : 9781600219948
Total Pages : 330 pages
Book Rating : 4.2/5 (199 download)
Download or read book Composite Materials Research Progress written by Lucas P. Durand and published by Nova Publishers. This book was released on 2008 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite materials are engineered materials made from two or more constituent materials with significantly different physical or chemical properties and which remain separate and distinct on a macroscopic level within the finished structure. Fibre Reinforced Polymers or FRPs include Wood comprising (cellulose fibers in a lignin and hemicellulose matrix), Carbon-fiber reinforced plastic or CFRP, Glass-fibre reinforced plastic or GFRP (also GRP). If classified by matrix then there are Thermoplastic Composites, short fiber thermoplastics, long fibre thermoplastics or long fibre reinforced thermoplastics There are numerous thermoset composites, but advanced systems usually incorporate aramid fibre and carbon fibre in an epoxy resin matrix. Composites can also utilise metal fibres reinforcing other metals, as in Metal matrix composites or MMC. Ceramic matrix composites include Bone (hydroxyapatite reinforced with collagen fibres), Cermet (ceramic and metal) and Concrete. Organic matrix/ceramic aggregate composites include Asphalt concrete, Mastic asphalt, Mastic roller hybrid, Dental composite, Syntactic foam and Mother of Pearl. Chobham armour is a special composite used in military applications. Engineered wood includes a wide variety of different products such as Plywood, Oriented strand board, Wood plastic composite (recycled wood fibre in polyethylene matrix), Pykrete (sawdust in ice matrix), Plastic-impregnated or laminated paper or textiles, Arborite, Formica (plastic) and Micarta. Composite materials have gained popularity (despite their generally high cost) in high-performance products such as aerospace components (tails, wings , fuselages, propellors), boat and scull hulls, and racing car bodies. More mundane uses include fishing rods and storage tanks. This new book presents the latest research from around the world.
Author :
Publisher :
ISBN 13 :
Total Pages : 784 pages
Book Rating : 4.3/5 (243 download)
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1984 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 538 pages
Book Rating : 4.:/5 (319 download)
Download or read book NASA Reference Publication written by and published by . This book was released on 1977 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Marvin B. Dow
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.:/5 (89 download)
Download or read book The ACEE Program and Basic Composites Research at Langley Research Center (1975 to 1986) written by Marvin B. Dow and published by . This book was released on 1987 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alan T. Nettles
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.:/5 (317 download)
Download or read book A Comparison of Quasi-Static Indentation to Low-Velocity Impact written by Alan T. Nettles and published by . This book was released on 2000 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: A static test method for modeling low-velocity foreign object impact events to composites would prove to be very beneficial to researchers since much more data can be obtained from a static test than from an impact test. In order to examine if this is feasible, a series of static indentation and low-velocity impact tests were carried out and compared. Square specimens of many sizes and thicknesses were utilized to cover the array of types of low-velocity impact events. Laminates with a [pi]/4 stacking sequence were employed since this is by far the most common type of engineering laminate. Three distinct flexural rigidities under two different boundary conditions were tested in order to obtain damage ranging from that due to large deflection to contact stresses and levels in-between to examine if the static indentation-impact comparisons are valid under the spectrum of damage modes that can be experienced. Comparisons between static indentation and low-velocity impact tests were based on the maximum applied transverse load. The dependent parameters examined included dent depth, back surface crack length, delamination area, and to a limited extent, load deflection behavior. Results showed that no distinct differences could be seen between the static indentation tests and the low-velocity impact tests, indicating that static indentation can be used to represent a low-velocity impact event.
