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Book Effect of Fiber Reinforcements on Thermo Oxidative Stability and Mechanical Properties of Polymer Matrix Composites

Download or read book Effect of Fiber Reinforcements on Thermo Oxidative Stability and Mechanical Properties of Polymer Matrix Composites written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-02 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of studies have investigated the thermo-oxidative behavior of polymer matrix composites. Two significant observations have been made from these research efforts: (1) fiber reinforcement has a significant effect on composite thermal stability; and (2) geometric effects must be considered when evaluating thermal aging data. A compilation of some results from these studies is presented, and this information shows the influence of the reinforcement fibers on the oxidative degradation of various polymer matrix composites. The polyimide PMR-15 was the matrix material that was used in these studies. The control composite material was reinforced with Celion 6000 graphite fiber. T-40R graphite fibers, along with some very stable ceramic fibers were selected as reinforcing fibers because of their high thermal stability. The ceramic fibers were Nicalon (silicon carbide) and Nextel 312 (alumina-silica-boron oxide). The mechanical properties of the two graphite fiber composites were significantly different, probably owing to variations in interfacial bonding between the fibers and the polyimide matrix. The Celion 6000/PMR-15 bond is very tight but the T-40/PMR-15 bond is less tight. Three oxidation mechanisms were observed: (1) the preferential oxidation of the Celion 6000 fiber ends at cut surfaces, leaving a surface of matrix material with holes where the fiber ends were originally situated; (2) preferential oxidation of the composite matrix; and (3) interfacial degradation by oxidation. The latter two mechanisms were also observed on fiber end cut surfaces. The fiber and interface attacks appeared to initiate interfiber cracking along these surfaces. Bowles, Kenneth J. Glenn Research Center RTOP 505-01-01...

Book Polymer Composite

Download or read book Polymer Composite written by M. C. Gupta and published by New Age International. This book was released on 2007 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Composites Are Well Known To Mankind Since Pre-Historic Period And Were Practiced As Well. But With The Development Of Polymers And Polymer Science, The Concept And Technology Have Undergone Sea Change In The Understanding Of The Basics Like The Role Of Matrix And Reinforcement, Bonding Mechanism, Morphological Features And Environmental Effects Etc.Polymer Composites Due To Their Lightweight, Chemical And Corrosion Resistance As Well As Heterogeneous Composition Provide Unlimited Possibilities Of Deriving Any Characteristic Material Behaviour. This Unique Flexibility In Design Tailoring And Other Characteristics, Such As Ease Of Manufacturing, High Specific Strength, Stiffness, Shape Molding, Corrosion Resistance, Durability, Adaptability And Cost Effectiveness, Have Attracted The Attention Of Engineers And Material Scientist And Technologists. They Have Become Materials Of 21St Century To Meet The Requirement Of Space, Missile, Marine And Medical Aid Technologies.This Book Deals In Detail Polymer Composites And Is Intended As Introduction To The Field Of Polymer Composites, Covering Various Aspects Of Structure, Design, Behaviour, Use And Quality Assurance. Though Designed Primarily For Polymer Technologists And Scientists, The Book May Prove To Be Useful For Under Graduate And Postgraduate Students Of Material Science And Engineering, Polymer Science And Chemical Technology Disciplines. The Book May Also Prove Useful For Students Of Polymer Chemistry.

Book Natural and Wood Fibre Reinforcement in Polymers

Download or read book Natural and Wood Fibre Reinforcement in Polymers written by A. K. Bledzki and published by iSmithers Rapra Publishing. This book was released on 2002 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report examines the different fibre types available and the current research. The authors have cited several hundred references to the latest work on properties, processing and applications. The different methods of fibre pretreatment are examined, together with fibre properties, chemistry and applications. This review is accompanied by summaries of papers from the Rapra Polymer Library database.

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 700 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.

Book Engineered Interfaces in Fiber Reinforced Composites

Download or read book Engineered Interfaces in Fiber Reinforced Composites written by Jang-Kyo Kim and published by Elsevier. This book was released on 1998-10-21 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study and application of composite materials are a truly interdisciplinary endeavour that has been enriched by contributions from chemistry, physics, materials science, mechanics and manufacturing engineering. The understanding of the interface (or interphase) in composites is the central point of this interdisciplinary effort. From the early development of composite materials of various nature, the optimization of the interface has been of major importance. While there are many reference books available on composite materials, few of them deal specifically with the science and mechanics of the interface of fiber reinforced composites. Further, many recent advances devoted solely to research in composite interfaces have been scattered in a variety of published literature and have yet to be assembled in a readily accessible form. To this end this book is an attempt to bring together recent developments in the field, both from the materials science and mechanics perspective, in a single convenient volume. The central theme of the book is tailoring the interface properties to optimise the mechanical peformance and structural integrity of composites with enhanced strength/stiffness and fracture toughness (or specific fracture resistance). It deals mainly with interfaces in advanced composites made from high performance fibers, such as glass, carbon, aramid, ultra high modulus polyethylene and some inorganic (e.g. B/W, A12O3, SiC) fibers, and matrix materials encompassing polymers, metals/alloys and ceramics. The book is intended to provide a comprehensive treatment of composite interfaces in such a way that it should be of interest to materials scientists, technologists and practising engineers, as well as graduate students and their supervisors in advanced composites. We hope that this book will also serve as a valuable source of reference to all those involved in the design and research of composite interfaces. The book contains eight chapters of discussions on microstructure-property relationships with underlying fundamental mechanics principles. In Chapter 1, an introduction is given to the nature and definition of interfaces in fiber reinforced composites. Chapter 2 is devoted to the mechanisms of adhesion which are specific to each fiber-matrix system, and the physio-chemical characterization of the interface with regard to the origin of adhesion. The experimental techniques that have been developed to assess the fiber-matrix interface bond quality on a microscopic scale are presented in Chapter 3, along with the techniques of measuring interlaminar/intralaminar strengths and fracture toughness using bulk composite laminates. The applicability and limitations associated with loading geometry and interpretation of test data are compared. Chapter 4 presents comprehensive theoretical analyses based on shear-lag models of the single fiber composite tests, with particular interest being placed on the interface debond process and the nature of the fiber-matrix interfacial bonding. Chapter 5 is devoted to reviewing current techniques of fiber surface treatments which have been devised to improve the bond strength and the fiber-matrix compatibility/stability during the manufacturing processes of composites. The micro-failure mechanisms and their associated theories of fracture toughness of composites are discussed in Chapter 6. The roles of the interface and its effects on the mechanical performance of fiber composites are addressed from several viewpoints. Recent research efforts to augment the transverse and interlaminar fracture toughness by means of controlled interfaces are presented in Chapters 7 and 8.

Book American Society of Composites Ninth International Conference Proceedings

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:

Book Comparison of Graphite Fabric Reinforced Pmr 15 and Avimid N Composites After Long Term Isothermal Aging at Various Temperatures

Download or read book Comparison of Graphite Fabric Reinforced Pmr 15 and Avimid N Composites After Long Term Isothermal Aging at Various Temperatures written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-30 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive effort is currently being expended to demonstrate the feasibility of using high-performance, polymer-matrix composites as engine structural materials over the expected operating lifetime of the aircraft, which can extend from 18,000 to 30,000 hr. The goal is to develop light-weight, high-strength, and high-modulus materials for use in higher temperature sections of advanced 21 st century aircraft propulsion systems. To accomplish this goal, it is necessary to pursue the development of thermal and mechanical durability models for graphite-fiber-reinforced, polymer-matrix composites. Numerous investigations have been reported regarding the thermo-oxidative stability (TOS) of the polyimide PMR-15 (1-5). A significant amount of this work has been directed at edge and geometry effects, reinforcement fiber influences, and empirical modeling of high-temperature weight loss behavior. It is yet to be determined if the information obtained from the PMR-15 composite tests is applicable to other polyimide-matrix composites. The condensation-curing polymer Avimid N is another advanced composite material often considered for structural applications at high temperatures. Avimid N has better thermo-oxidative stability than PMR-15 (6), but the latter is more easily processed. The most comprehensive study of the thermo-oxidative stability of Avimid N neat resin and composites at 371 (infinity)C is found in Salin and Seferis (7). The purposes of the work described herein were to compare the thermal aging behavior of these two matrix polymers and to determine the reasons for and the consequences of the difference in thermal durability. These results might be of some use in improving future polymer development through the incorporation of the desirable characteristics of both polyimides. Bowles, Kenneth J. and McCorkle, Linda and Ingrahm, Linda Glenn Research Center NAS3-27351; RTOP 538-06-15...

Book Polymer Matrix Composites and Technology

Download or read book Polymer Matrix Composites and Technology written by Ru-Min Wang and published by Elsevier. This book was released on 2011-07-14 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given such properties as low density and high strength, polymer matrix composites have become a widely used material in the aerospace and other industries. Polymer matrix composites and technology provides a helpful overview of these materials, their processing and performance.After an introductory chapter, part one reviews the main reinforcement and matrix materials used as well as the nature of the interface between them. Part two discusses forming and molding technologies for polymer matrix composites. The final part of the book covers key aspects of performance, including tensile, compression, shear and bending properties as well as impact, fatigue and creep behaviour.Polymer matrix composites and technology provides both students and those in industry with a valuable introduction to and overview of this important class of materials. Provides a helpful overview of these materials, their processing and performance incorporating naming and classification of composite materials Reviews the main reinforcement and matrix materials used as well as the nature of the interface between them including damage mechanisms Discusses forming and molding technologies for polymer matrix composites outlining various techniques and technologies

Book American Society for Composites

Download or read book American Society for Composites written by Michael Hyer and published by DEStech Publications, Inc. This book was released on 2011-06-28 with total page 2760 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Multiscale Modeling and Simulation of Composite Materials and Structures

Download or read book Multiscale Modeling and Simulation of Composite Materials and Structures written by Young W. Kwon and published by Springer Science & Business Media. This book was released on 2007-10-23 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state-of-the-art in multiscale modeling and simulation techniques for composite materials and structures. It focuses on the structural and functional properties of engineering composites and the sustainable high performance of components and structures. The multiscale techniques can be also applied to nanocomposites which are important application areas in nanotechnology. There are few books available on this topic.

Book Thermo oxidative Stability of Graphite PMR 15 Composites

Download or read book Thermo oxidative Stability of Graphite PMR 15 Composites written by Madhu S. Madhukar and published by . This book was released on 1994 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Biofiller Reinforced Biodegradable Polymer Composites

Download or read book Biofiller Reinforced Biodegradable Polymer Composites written by R. Jumaidin and published by CRC Press. This book was released on 2020-10-27 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting a comprehensive overview of the field, Biofiller-Reinforced Biodegradable Polymer Composites examines biodegradable composites derived from biofiller and biodegradable polymers while providing critical information for efficient use of biocomposites developed from natural resources. Discusses advanced techniques for the use of both biofiller and biodegradable polymers as the matrix for composites. Highlights application of both natural fiber and natural matrix for composites in the development of environmentally friendly and sustainable materials. Introduces the basics of biocomposites, the processing and characteristics of new composite materials, and new combinations of composites such as soy protein and nanocellulose. Elaborates on the introduction of new materials to develop biodegradable polymer. This book has been written for researchers, advanced students, and professional engineers and materials scientists working in the area of bio-based polymers, natural fiber composites, and composites.

Book Thermo Mechanical Properties of Polymer Composites

Download or read book Thermo Mechanical Properties of Polymer Composites written by Dr. Inamuddin and published by Trans Tech Publications Ltd. This book was released on 2019-08-07 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers describing the results of some research in the area of application diffusion and transport phenomena in polymer composite materials and substances for the industrial and engineering goals. We hope that the presented papers will be interesting and useful for many engineers and researchers.