Fracture Behavior Of Epoxy Based Hybrid Composites
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Fracture Behavior Of Epoxy Based Hybrid Composites
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Author : Daniel Davies
language : en
Publisher:
Release Date : 2013
Fracture Behavior Of Epoxy Based Hybrid Composites written by Daniel Davies and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Crosslinked epoxy resins have become popular materials in advanced engineering applications such as the aerospace, packaging, coatings, electrical, and adhesive industries. These resins offer a high strength to weight ratio, but have a drawback of being inherently brittle and exhibit poor flaw tolerance. In microelectronic packaging applications, the thermal expansion coefficients (CTEs) of neat epoxy resins are too high. The addition of inorganic fillers is a traditional solution for increasing fracture toughness and lowering CTE. Such a solution is routinely utilized in epoxy-based underfills used in flip chip packaging. Of particular interest in this study, is the incorporation of soft, compliant rubbery particles and stiff, rigid silica particles into a model epoxy system. Rubber particle addition has proven to be extremely effective at improving fracture toughness of epoxy composite resins through rubber particle cavitation, matrix void growth, and massive shear yielding mechanisms. The addition of silica particles can also provide increases in fracture toughness, and do so without the compromises of decreased yield strength or increased CTE. Hybrid composites comprised of both rubber and silica particles have shown synergistic toughening benefits by some researchers. In this particular study, an aromatic amine cured bisphenol-A based epoxy resin is used as the model epoxy matrix. The fracture behavior of epoxies filled with silica micro-spheres and/or rubber nano-particles at various concentrations in the matrix have been studied. Micron-size silica particles successfully showed decreases in the CTE of the epoxy matrix, but only provided minimal toughening benefits. Nanometer-size core-shell-rubber particles provided exceptional toughening benefits, but resulted in increased CTE of the epoxy matrix. Interestingly, some hybrid epoxy composite formulations exhibited excellent fracture toughness and reasonable CTE behavior. It is the ultimate goal of this study to provide an understanding of the toughening mechanisms produced for each additive and their interactive effects on each other. It has been hypothesized that the use of rubber nanoparticles in a highly silica filled epoxy may result in significant improvements in toughness since these nanoparticle may be able to grow shear bands around the micron-size silica particles. The results from this study support this hypothesis.
Improving The Impact And Fracture Resistance Of Fibrous Composites
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Author : Peter William Robert Beaumont
language : en
Publisher:
Release Date : 1975
Improving The Impact And Fracture Resistance Of Fibrous Composites written by Peter William Robert Beaumont and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.
A three phase program to improve the impact resistance of composite materials was undertaken. In the first phase, the Charpy impact test is investigated as a method for characterising dynamic behavior. The importance of differentiating between the energies of crack initiation and crack propagation is discussed, and a parameter called the Ductility Index is proposed, together with maximum stress and work of fracture for comparing the dynamic fracture behavior of fiber composites. Slow three point bending and instrumented impact tests were carried out to investigate the quasi-static and dynamic fracture behavior of (1) unidirectional fiber composites consisting of carbon and glass fibers embedded in an epoxy resin matrix; (2) cross-ply carbon fiber-reinforced epoxy resin composites, and (3) a carbon fiber/glass fiber/epoxy resin hybrid composite. It was found that fiber hybridization could raise both the fracture stress and toughness, and ductility index of carbon fiber composite materials.
Interlaminar Fracture Toughness Of Glass Fiber Laminates Additionally Reinforced With Carbon Bead
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Author : J-J Lee
language : en
Publisher:
Release Date : 1995
Interlaminar Fracture Toughness Of Glass Fiber Laminates Additionally Reinforced With Carbon Bead written by J-J Lee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Bead-filled epoxy categories.
The plane-strain fracture toughnesses of two different particle-filled epoxies have been measured using compact tension specimens. Significant increases in toughness were observed (up to about 50 with 30% volume fraction of bead). In the phenolic bead-filled epoxy, the major toughening mechanism is crack pinning, while in the carbon bead-filled epoxy, localized plastic deformation associated with particle-matrix debonding and transparticle fracture lead to the toughening. The interlaminar fracture behaviors of hybrid composites, based on bead-filled epoxy matrices, have been investigated using DCB (double cantilever beam) and ENF (end notch flexure) specimens for Mode I and Mode II tests, respectively. The hybrid composite based on carbon bead shows an increase in both GIc initiation and GIIc values as compared to a GFRP laminate with unmodified epoxy matrix. The optimum bead volume fraction for the hybrid composite is about 15% by volume of the matrix. However, the unmodified epoxy glass fiber composite shows a higher GIc propagation value than that of the hybrid composites due to fiber bridging, which is less pronounced in the hybrids, as the presence of the beads results in a matrix-rich interply region. The relationship between the Mode I interlaminar fracture mechanics parameters (i.e., GIc and KIc values), obtained from DCB specimens, has been reviewed using orthotropic fracture mechanics.
Epoxy Based Biocomposites
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Author : Chandrasekar Muthukumar
language : en
Publisher: CRC Press
Release Date : 2023-09-29
Epoxy Based Biocomposites written by Chandrasekar Muthukumar and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-09-29 with Technology & Engineering categories.
Epoxy-Based Biocomposites highlights the influence of fibre type, nanofillers, and ageing conditions on the performance of epoxy-based biocomposites subjected to various loading conditions. This book serves as a useful reference for researchers, graduate students, and engineers in the field of polymer composites. In addition to investigating the behaviour of hybrid biocomposites and biocomposites reinforced with various nanofillers, this book discusses the response of epoxy-based biocomposites exposed to moisture absorption, accelerated weathering, and hygrothermal ageing. This book also considers the static and dynamic properties, such as creep, fatigue, and free vibration properties.
Carbon Nanotube Polymer Composites
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Author : Dimitrios Tasis
language : en
Publisher: Royal Society of Chemistry
Release Date : 2013
Carbon Nanotube Polymer Composites written by Dimitrios Tasis and has been published by Royal Society of Chemistry this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Science categories.
The purpose of this book is to summarize the basic chemical aspects for obtaining multifunctional carbon nanotube-based polymer composites, but also to highlight some of the most remarkable advances that occurred in the field during the last recent years.
Handbook Of Epoxy Fiber Composites
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Author : Sanjay Mavinkere Rangappa
language : en
Publisher: Springer Nature
Release Date : 2022-08-01
Handbook Of Epoxy Fiber Composites written by Sanjay Mavinkere Rangappa and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-08-01 with Technology & Engineering categories.
This handbook presents the current state-of-knowledge in the area of epoxy fiber composites. The book emphasizes new challenges and covers synthesis, characterization, and applications of epoxy/fiber composites. Leading researchers from industry, academy, government and private research institutions across the globe have contributed to this book. The contents comprehensively cover the current status, trends, future directions, and application opportunities in the field. This highly application-oriented handbook will be of use to researchers and professionals alike.
Fracture Behavior Of Thick Laminated Graphite Epoxy Composites
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Author : Charles E. Harris
language : en
Publisher:
Release Date : 1984
Fracture Behavior Of Thick Laminated Graphite Epoxy Composites written by Charles E. Harris and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Epoxy compounds categories.
Mechanical And Physical Testing Of Biocomposites Fibre Reinforced Composites And Hybrid Composites
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Author : Mohammad Jawaid
language : en
Publisher: Woodhead Publishing
Release Date : 2018-09-14
Mechanical And Physical Testing Of Biocomposites Fibre Reinforced Composites And Hybrid Composites written by Mohammad Jawaid and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-14 with Technology & Engineering categories.
Mechanical and Physical Testing of Biocomposites, Fibre-Reinforced Composites and Hybrid Composites covers 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. Topics of interest include mechanical properties, such as tensile, flexural, compression, shear, impact, fracture toughness, low and high velocity impact, and anti-ballistic properties of natural fiber, synthetic fibers and hybrid composites materials. It also covers physical properties, such as density, water absorption, thickness swelling, and void content of composite materials fabricated from natural or synthetic materials. 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
Fracture Behavior Of Thick Laminated Graphite Epoxy Composites
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Author : C. E. Harris
language : en
Publisher:
Release Date : 1984
Fracture Behavior Of Thick Laminated Graphite Epoxy Composites written by C. E. Harris and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Epoxy compounds categories.
Failure Analysis In Biocomposites Fibre Reinforced Composites And Hybrid Composites
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Author : Mohammad Jawaid
language : en
Publisher: Woodhead Publishing
Release Date : 2018-09-17
Failure Analysis In Biocomposites Fibre Reinforced Composites And Hybrid Composites written by Mohammad Jawaid and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-17 with Technology & Engineering categories.
Failure Analysis in Biocomposites, Fibre-Reinforced Composites and Hybrid Composites covers 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. The book describes a broad range of techniques and strategies for the compositional and failure analysis of polymeric materials and products. It also illustrates the application of analytical methods for solving commonly encountered problems. Topics of interest include failure analysis, mechanical and physical properties, structural health monitoring, durability and life prediction, modelling of damage processes of natural fiber, synthetic fibers, and more. 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