Download or read book Moisture Absorption and Stiffness Degradation of Carbon Fiber Reinforced Polymer Composite Specimens Exposed to Accelerated Environmental Aging Conditions written by Kyle J. Eyre and published by . This book was released on 2007 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the moisture absorption and stiffness degradation studies, both fabric and plate CFRP were evaluated utilizing different epoxy resin systems. Specimens were exposed to: dry control (DC) conditions, and immersed in water at: 30°C (86°F), 50°C (122°F), and 60°C (140°F). Exposure times for the specimens ranged from 7 days to 50 days. The results of the two studies show that varying amounts of moisture absorption and stiffness degradation of the specimens (minor to significant) occurred over time. Comparisons of the performances of the different CFRP composite types were made.

Download or read book Aging Effects on Natural Fiber Reinforced Polymer Composites written by Chandrasekar Muthukumar and published by Springer Nature. This book was released on 2022-01-31 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the topic of degradation phenomenon of natural fiber-based composites (NFC) under various aging conditions and proposes suitable solutions to improve the response of natural fiber-reinforced composite to aging conditions such as moisture, seawater, hygrothermal, and natural and accelerated weathering. The information provided by the book plays a vital role in the durability and shelf life of the composites as well as broadening the scope of outdoor application for natural fiber-based composites. The book will be appropriate for researchers and scientist who are interested in the application of natural fiber composites in various fields.

Download or read book Aging and Durability of FRP Composites and Nanocomposites written by Arya Uthaman and published by Elsevier. This book was released on 2024-02-21 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The usage of composites is a broad and growing area of scientific research, especially in developed and developing countries. These materials are used in a broad range of applications in both structural and civil engineering sectors. In many of these applications FRPs are exposed to one or more environmental influences, so they need to be designed to meet durability requirements to withstand even the harshest of environments. Aging and Durability of FRP Composites and Nanocomposites focuses on the latest developments in durability and long-term ageing studies of composite materials especially for those used in civil and structural engineering applications. The book will be a valuable reference resource for materials scientists and engineers who want to learn more about the long-term service life and durability behaviour of composites under different environmental conditions. - Discusses composites and polymer nanocomposites - Reviews different types of aging processes and degradation mechanisms in composites - Covers different types of accelerated aging tests - Presents theory, modeling, and simulation studies of aged composites and nanocomposites - Looks at recent trends and future possibilities

Download or read book Fiber Reinforced Polymer FRP Composites for Infrastructure Applications written by Ravi Jain and published by Springer Science & Business Media. This book was released on 2012-01-02 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: This overview examines current issues of fiber reinforced polymer (FRP) composites in civil infrastructure. Part I engages topics related to durability and service life of FRP composites, and how they contribute to sustainability, while Part II highlights implementation and applications.

Download or read book Ageing of Composites written by Rod Martin and published by Elsevier. This book was released on 2008-08-29 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ageing of composites is a highly topical subject given the increasing use of composites in structural applications in many industries. Ageing of composites addresses many of the uncertainties about the long-term performance of composites and how they age under conditions encountered in service.The first part of the book reviews processes and modelling of composite ageing including physical and chemical ageing of polymeric composites, ageing of glass-ceramic matrix composites, chemical ageing mechanisms, stress corrosion cracking, thermo-oxidative ageing, spectroscopy of ageing composites, modelling physical and accelerated ageing and ageing of silicon carbide composites. Part two examines ageing of composites in transport applications including aircraft, vehicles and ships. Part three reviews ageing of composites in non-transport applications such as implants in medical devices, oil and gas refining, construction, chemical processing and underwater applications.With its distinguished editor and international team of contributors, Ageing of composites is a valuable reference guide for composite manufacturers and developers. It also serves as a source of information for material scientists, designers and engineers in industries that use composites, including transport, chemical processing and medical engineering. - Addresses many of the uncertainties about the long-term performance of composites and how they age under conditions encountered in service - Reviews processes and modelling of composite ageing including chemical ageing mechanisms and stress corrosion cracking - Discusses ageing of composites in both transport and non-transport applications ranging from aircraft to implants in medical devices

Download or read book An Introduction to the Mechanical Properties of Solid Polymers written by I. M. Ward and published by John Wiley & Sons. This book was released on 2005-08-19 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive introduction to the mechanical behaviour of solid polymers. Extensively revised and updated throughout, the second edition now includes new material on mechanical relaxations and anisotropy, composites modelling, non-linear viscoelasticity, yield behaviour and fracture of tough polymers. The accessible approach of the book has been retained with each chapter designed to be self contained and the theory and applications of the subject carefully introduced where appropriate. The latest developments in the field are included alongside worked examples, mathematical appendices and an extensive reference. Fully revised and updated throughout to include all the latest developments in the field Worked examples at the end of the chapter An invaluable resource for students of materials science, chemistry, physics or engineering studying polymer science

Download or read book Effects of Environmental Ageing Parameters on Interfacial Bond Properties of Carbon Fiber Tow in Epoxy Resin written by Shloka Vemuganti and published by . This book was released on 2009 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of environment on the interfacial bond strength of carbon fiber tow embedded in epoxy resin are being studied through accelerated aging experiments and pull-out tests (PT). The goal is to examine the synergistic effects of hot, cold, wet, dry and stressed environment on interfacial bond strength (IFBS) of carbon/epoxy composites in order to forecast life of composites in severe environments. The PT specimens were prepared by embedding a fixed length of a carbon fiber tow in uncured epoxy. The interfacial debonding between resin and fiber tow is the targeted mode of failure. A spring loaded frame was designed for applying a preset load to multiple PT specimens. All the PT specimens including the frames with the stressed specimens were subjected to accelerated environmental aging conditions for different time intervals. The moisture absorption and desorption data were recorded. The PT tests were then carried out by pulling the carbon fiber tow from the cylindrical resin, mounted in a screw driven MTS testing machine. Average IFBS of approximately 21.5 MPa was observed for the unaged control sample. The hot/wet/stressed (70°C/3% moisture/2 lb) specimens show a significant degradation ( -29.03 %) in bond strength after 176 days of aging time. The degradation due to moisture is seen to be more critical under the influence of temperatures (50°C, 70°C). In order to obtain the maximum interfacial shear strength for various embedded lengths and environmental aging parameters, a numerical analysis has been carried out using a 3D finite element model (FEM). A FEM analysis was done using cohesive elements at the fiber/matrix interface in order to study the environmental aging effects at the interface. The predicted bond strength from the numerical analysis was compared with the experimental data. A reasonable agreement was observed between experimental data and Finite Element Analysis (FEA).

Download or read book Composite Materials written by It Meng Low and published by Elsevier. This book was released on 2021-06-18 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite materials have been well developed to meet the challenges of high-performing material properties targeting engineering and structural applications. The ability of composite materials to absorb stresses and dissipate strain energy is vastly superior to that of other materials such as polymers and ceramics, and thus they offer engineers many mechanical, thermal, chemical and damage-tolerance advantages with limited drawbacks such as brittleness. Composite Materials: Manufacturing, Properties and Applications presents a comprehensive review of current status and future directions, latest technologies and innovative work, challenges and opportunities for composite materials. The chapters present latest advances and comprehensive coverage of material types, design, fabrication, modelling, properties and applications from conventional composite materials to advanced composites such as nanocomposites, self-healing and smart composites. The book targets researchers in the field of advanced composite materials and ceramics, students of materials science and engineering at the postgraduate level, as well as material engineers and scientists working in industrial R& D sectors for composite material manufacturing. - Comprehensive coverage of material types, design, fabrication, modelling, properties and applications from conventional composite materials to advanced composites such as nanocomposites, self-healing and smart composites - Features latest advances in terms of mechanical properties and other material parameters which are essential for designers and engineers in the composite and composite reinforcement manufacturing industry, as well as all those with an academic research interest in the subject - Offers a good platform for end users to refer to the latest technologies and topics fitting into specific applications and specific methods to tackle manufacturing or material processing issues in relation to different types of composite materials

Download or read book Environmental Degradation of Industrial Composites written by Celine A Mahieux and published by Elsevier. This book was released on 2005-12-14 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thanks to their low density and tailored properties, polymer matrix composites are attractive candidates for a large number of industrial applications ranging from aerospace to transportation and energy. However, the behaviour of polymer-based materials is strongly affected by a number of environmental factors. Environmental Degradation in Industrial Composites provides vital information on the effects of environmental factors such as temperature, liquid and gas exposure, electrical fields and radiations, and how micro- and micromechanical calculations during design and manufacture must take these effects into account. The book concludes with reviews on standard and specific testing methods for the various environmental factors and their combinations, helping mechanical/materials engineers and specifiers to predict possible changes due to environmental conditions. Each chapter is supplemented by industrial case studies to help in the understanding of degradation of composites in real life situations.This book will help you to...* Understand how environmental factors lead to degradation effects in polymer matrix composite structures* Build these factors into calculations when predicting the part performance and lifetime of structures* Compare real-life situations from case studies with your predicted results* Predict probable composite behaviour with greater accuracyThis book will help you to...* Understand how environmental factors lead to degradation effects in polymer matrix composite structures* Build these factors into calculations when predicting the part performance and lifetime of structures* Compare real-life situations from case studies with your predicted results* Predict probable composite behaviour with greater accuracy

Download or read book Durability and Life Prediction in 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 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Durability and Life Prediction in Biocomposites, Fibre-Reinforced Composites and Hybrid Composites focuses on the advanced characterization techniques used for the analysis of composite materials developed from natural fiber/biomass, synthetic fibers and a combination of these materials used as fillers and reinforcements to enhance materials performance and utilization in automotive, aerospace, construction and building components. The book presents 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. 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.

Download or read book Investigation of Environmental Durability of Carbon Fiber epoxy Composites written by Samet Yağmur and published by . This book was released on 2013 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber reinforced polymer composites, that have increasing demand in many applications such as aircraft and automotive industry, are usually exposed to different environmental conditions which may be harmful to them. The investigation of their environmental durability is critical for those applications. The objective of this study was to investigate the effects of temperature and moisture on durability of carbon fiber reinforced epoxy composites. For this purpose, 0/90° woven, plain unidirectional and non-crimp biaxial ±45 fabrics were used as reinforcement. The specimens were manufactured using vacuum resin infusion process to obtain relatively high fibre volume fraction ratios. The composites manufactured were exposed to cyclic aging conditions to simulate aircraft flight environment. Hygrothermal, high temperature and freezing conditions were used as in one cycle which was 12 hours long. Moisture absorption was determined by weighing the specimens at regular intervals as a function of aging cycles. Tensile and flexural tests were performed prior to aging and after 500, 1000 and 1500 hours aging. After the completion of aging cycles, the moisture content did not increase significantly due to presence of subzero and high temperatures in aging cycles. The mechanical test results revealed differences based on the fabric types used. It was found that the tensile strength and modulus values of woven composites increased after aging cycles as compared to those of unidirectional and biaxial composites. On the other hand, flexural properties decreased at the end of the aging cycles for the composites aged as test coupons.

Download or read book GB T 42911 2023 Translated English of Chinese Standard GB T 42911 2023 GBT42911 2023 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2024-01-22 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document describes methods for accelerated moisture absorption and supersaturation conditioning of carbon fiber reinforced composites. This method is carried out in a saturated water vapor sealed pressure vessel at a temperature higher than 100??C but lower than the glass transition temperature (Tg) of the test material. This document applies to thermosetting carbon fiber reinforced composite materials with a glass transition temperature greater than 150??C. For thermoplastic carbon fiber reinforced composite materials, this document can also be used as a reference.

Download or read book Environmental Durability of Graphite epoxy Composites written by Christopher C. Pauly and published by . This book was released on 2002 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing acceptance and incorporation of fiber-reinforced polymer matrix composites (PMCs) as engineering construction materials have led many to look to the infrastructure as an application for these versatile materials. One such system is pultruded graphite fiber-reinforced epoxy (graphite/epoxy). Some PMC systems degrade when subjected to environmental conditions (e.g., moisture, stress, UV light, electrochemical polarization). These variables are typically studied either singularly or in series, but in real applications (e.g., aerospace, marine, infrastructure), these materials are subjected to many of these conditions simultaneously. To simulate field conditions, this study investigated the combined effects of an aqueous environment, electrochemical polarization, and applied bending stress on the durability of a pultruded graphite/epoxy composite. The findings indicate that graphite/epoxy composites cannot be assumed to be insensitive to degradation by environmental variables. Further, electrochemical polarization, as might occur with contact with a metal such as a fastener, can accelerate degradation. This damage requires the presence of moisture. Chloride and sulfate concentrations in rain are sufficient to establish an electrolyte within creviced regions, but deicing salts would overtake these as a contributor to conductivity. Further findings may be summarized as follows: 1.) Application of polarization in an aerated 0.6M NaCl environment led to breakdown of the fiber/matrix interface. The high pH environment created during the oxygen reduction reaction was necessary but not sufficient to create this breakdown, as the unpolarized specimen exposed to a pH 13 environment did not degrade. Cathodic polarization as would occur by coupling to steel or aluminum is required. 2.)Application of cathodic polarization did not significantly alter strength. Average measurements of shear strength, however, did decrease with the application of cathodic polarization for 70 and 90 days.

Download or read book Composite Materials Testing and Design fifth Conference written by and published by . This book was released on 1979 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hybrid Natural Fiber Composites written by Anish Khan and published by Woodhead Publishing. This book was released on 2021-01-21 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on natural fiber composites is an emerging area in the field of polymer science with tremendous growth potential for commercialization. Hybrid Natural Fiber Composites: Material Formulations, Processing, Characterization, Properties, and Engineering Applications provides updated information on all the important classes of natural fibers and their composites that can be used for a broad range of engineering applications. Leading researchers from industry, academia, government, and private research institutions from across the globe have contributed to this highly application-oriented book. The chapters showcase cutting-edge research discussing the current status, key trends, future directions, and opportunities. Focusing on the current state of the art, the authors aim to demonstrate the future potential of these materials in a broad range of demanding engineering applications. This book will act as a one-stop reference resource for academic and industrial researchers working in R&D departments involved in designing composite materials for semi structural engineering applications. - Presents comprehensive information on the properties of hybrid natural fiber composites that demonstrate their ability to improve the hydrophobic nature of natural fiber composites - Reviews recent developments in the research and development of hybrid natural fiber composites in various engineering applications - Focuses on modern technologies and illustrates how hybrid natural fiber composites can be used as alternatives in structural components subjected to severe conditions

Download or read book Defects and Damage in Composite Materials and Structures written by Rikard Benton Heslehurst and published by CRC Press. This book was released on 2014-04-21 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advantages of composite materials include a high specific strength and stiffness, formability, and a comparative resistance to fatigue cracking and corrosion. However, not forsaking these advantages, composite materials are prone to a wide range of defects and damage that can significantly reduce the residual strength and stiffness of a structure or result in unfavorable load paths. Emphasizing defect identification and restitution, Defects and Damage in Composite Materials and Structures explains how defects and damage in composite materials and structures impact composite component performance. Providing ready access to an extensive, descriptive list of defects and damage types, this must-have reference: Examines defect criticality in composite structures Recommends repair actions to restore structural integrity Discusses failure modes and mechanisms of composites due to defects Reviews NDI processes for finding and identifying defects in composite materials Relating defect detection methods to defect type, the author merges his experience in the field of in-service activities for composite airframe maintenance and repair with indispensable reports and articles on defects and damage in advanced composite materials from the last 50 years.

Download or read book Durability of Composites for Civil Structural Applications written by Institute of Materials, Minerals, and Mining and published by Woodhead Publishing. This book was released on 2007-07-25 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides practising engineers, decision makers and students with a useful and fundamental guide to the use of FRP composites within civil and structural engineering. A P Mouritz, RMIT, Australia.