Download or read book Accelerated Environmental Degradation of GRP Composite Materials written by Power Madoda Dlamini and published by . This book was released on 2004 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fibrous Polymeric Composites written by Bankim Chandra Ray and published by CRC Press. This book was released on 2018-05-20 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book emphasizes the scientific origin of deformation and damage of FRP composites under various environmental effects and analyses present understanding on degradation mechanisms, role of interfaces and addition of nanofillers Discusses micro-characterization of composites and interfaces, also includes micro-mechanisms and microscopic evidences to establish the structure-property correlation Elucidates advantages and limitations of FRP composites in supercritical applications

Download or read book Accelerated Tests of Environmental Degradation in Composite Materials written by Tom George Reynolds and published by . This book was released on 1998 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: High temperature polymer matrix composites are key candidates for the structural components of proposed supersonic transport aircraft. The operational environment of these vehicles exposes the airframe to harsh conditions, including temperature extremes and moisture. These environments have been seen to cause visible damage in polymer matrix composites in timescales much less than the lifetime of the vehicle. Therefore, there is an urgent requirement for accelerated testing of the key components of the environment. A first step to this goal is to identify the components of the environment responsible for the damage. The effects of a realistic moisture and thermal environment on two high temperature polymer matrix composites (PETI-5 and PIXA-M) have been investigated in this work. An extensive test program was developed to test the response of the materials to this baseline environment and its individual components: time at moisture, moisture cycling, time at temperature and thermal cycling. Mechanism-based models were used to design accelerated moisture cycles and accelerated thermal cycles in an attempt to speed up the response to these environmental factors. These accelerated cycles were also used in the test program. The results showed visible damage in the form of cracking in both materials. The PIXA-M material was found to show more damage than the PETI-5. Cracking was confined to a thin layer of material next to the exposed edge. This suggests that the environmental exposure is reducing the effective fracture toughness of the material in this layer more than in the interior. Analysis suggests that this layer is exposed to more of the environmental components and fluctuations than the material in the interior. The individual components of time at moisture and thermal cycling were seen to cause cracking, while time at temperature did not, and moisture cycling did not appear to accelerate moisture damage. The combined environments in the baseline cycle caused more damage than any one component of the cycle on its own. Evidence points to the combined effects of time at moisture and thermal cycling as being the dominant parameters causing damage, while moisture cycling controls the extent of the damaged region. Although the designed accelerated cycles were not successful in accelerating the damage from the baseline cycle, they were instrumental in establishing what were the dominant parameters. It is suggested that a promising way of accelerating the damage observed under the realistic conditions is by combining an isomoisture environment with a cyclical stress environment, which can be achieved either thermally or mechanically.

Download or read book Accelerated Tests of Environmental Degradation in Composite Materials written by TG. Reynolds and published by . This book was released on 2001 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combined moisture cycling and thermal cycling environments are known to create damage, such as cracking of material near exposed surfaces and edges, in many new materials intended for high-temperature service. Material models suggest the damage mechanisms; these models are used to design tests to (1) isolate the effects of different damage mechanisms, and (2) accelerate them. Tests are carried out in the combined environment and in its individual components: time at moisture, moisture cycling, time at temperature, and thermal cycling. Accelerated moisture cycling and thermal cycling tests are also designed and carried out. Results are presented which suggest that, for the IM7/PETI-5 and IM7/PIXA-M materials tested, time at moisture is the most important cause of microcracking damage, with thermal cycling playing some role. Moisture cycling plays a role in the distribution of damage. The models are used to reduce laminate-specific microcracking data to general design data in the form of fracture toughness versus cycle (GIc(N)) curves.

Download or read book Environmental Effects on Advanced Composite Materials written by ASTM-ASME-MPC Joint Committee on Effect of Temperature on the Properties of Metals. Aerospace Panel and published by ASTM International. This book was released on 1976 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ageing Studies and Lifetime Extension of Materials written by Les Mallinson and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first International Conference on Ageing Studies and Lifetime Extension of Materials was held on th July 12-14 , 1999 at St. Catherine's College, Oxford, United Kingdom. Over 230 delegates attended during the three days and heard nearly ninety papers, together with over thirty poster presentations. Sixteen of these papers were keynotes from invited speakers eminent in their field of research. The proceedings were organised into six separate sessions: observation and understanding of real-time and accelerated ageing; experimental techniques; modelling and theoretical studies; lifetime prediction and validation; lifetime extension; and material design for ageing. In doing this, it was hoped to cover most issues of scientific concern inthefield ofmaterials ageing. One important aspect was that the conference did not concentrateon any particular group or type ofmaterial; rather the aim was to attract contributions from workers engaged in ageing studies with as wide a range of materials as possible. In this way, it was hoped that delegates could interactwith and learnfrom those whom they perhapswould not normally come across and that metallurgists could learn from polymer scientists, ceramicists could talk to modellers, and so on, in this important field. A read through the diverse papers contained within these proceedings will confirm that this aim was happily satisfied. Why hold such a meeting? In the modem world, engineered systems are expected to last longer.

Download or read book Mechanics of Composite Materials written by F. W. Wendt and published by Elsevier. This book was released on 2013-10-22 with total page 903 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics of Composite Materials contains the proceedings of the Fifth Symposium on Naval Structural Mechanics held in Philadelphia, Pennsylvania, on May 8-10, 1967. The papers explore the mechanics of composite materials for naval applications. The structural requirements of a system and the fundamental mechanical properties of composite materials, as well as the behavior of such materials under various environmental conditions, are discussed. This book is comprised of 40 chapters and begins with an analysis of missile and aircraft systems constraints and operational requirements, along with ship systems constraints and operational requirements, for composite materials. The following chapters focus on structural uses of composites, particularly in naval ships, aircraft, re-entry vehicles, and space vehicle structures; and the micromechanics, structural mechanics, and failure mechanics of composite materials. Problems in the design of joints and attachments are considered, along with the stability of pre-strained laminated media; environmental factors in the design of composite materials; and the effect of water on glass-reinforced plastics. This monograph will be a useful resource for scientists and engineers who are particularly concerned with the mechanics of composite materials.

Download or read book Environmental Effects on Composite Materials written by George S. Springer and published by . This book was released on 1981 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 2018-09-13 with total page 468 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. - 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 Handbook of Environmental Degradation of Materials written by Myer Kutz and published by William Andrew. This book was released on 2012-12-31 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nothing stays the same for ever. The environmental degradation and corrosion of materials is inevitable and affects most aspects of life. In industrial settings, this inescapable fact has very significant financial, safety and environmental implications. The Handbook of Environmental Degradation of Materials explains how to measure, analyse, and control environmental degradation for a wide range of industrial materials including metals, polymers, ceramics, concrete, wood and textiles exposed to environmental factors such as weather, seawater, and fire. Divided into sections which deal with analysis, types of degradation, protection and surface engineering respectively, the reader is introduced to the wide variety of environmental effects and what can be done to control them. The expert contributors to this book provide a wealth of insider knowledge and engineering knowhow, complementing their explanations and advice with Case Studies from areas such as pipelines, tankers, packaging and chemical processing equipment ensures that the reader understands the practical measures that can be put in place to save money, lives and the environment. - The Handbook's broad scope introduces the reader to the effects of environmental degradation on a wide range of materials, including metals, plastics, concrete,wood and textiles - For each type of material, the book describes the kind of degradation that effects it and how best to protect it - Case Studies show how organizations from small consulting firms to corporate giants design and manufacture products that are more resistant to environmental effects

Download or read book Environmental Effects on Composite Materials Volume II written by George S. Springer and published by CRC Press. This book was released on 1981 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book IUTAM Symposium on Analytical and Computational Fracture Mechanics of Non Homogeneous Materials written by B.L. Karihaloo and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume constitutes the Proceedings of the IUTAM Symposium on "Analytical and Computational Fracture Mechanics of Non-homogeneous Materials", held in Cardiff from 18th to 22nd June 2001. The Symposium was convened to address and place on record topical issues in analytical and computational aspects of the fracture of non-homogeneous materials as they are approached by specialists in mechanics, materials science and related fields. The expertise represented in the Symposium was accordingly very wide, and many of the world's greatest authorities in their respective fields participated. Given the extensive range and scale of non-homogeneous materials, it had to be focussed to enhance the quality and impact of the Symposium. The range of non-homogeneous materials was limited to those that are inhomogeneous at the macroscopic level and/or exhibit strain softening. The issues of micro to macro scaling were not excluded even within this restricted range which covered materials such as rock, concrete, ceramics and composites on the one hand, and, on the other, those metallic materials whose ductile fracture is strongly influenced by the presence of inhomogeneities. The Symposium remained focussed on fundamental research issues of practical significance. These issues have many common features among seemingly disparate non-homogeneous materials.

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 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 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 Developments in GRP Technology written by and published by . This book was released on 1983 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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