Multiscale Characterization And Modeling Of Progressive Failure In Nano Graphene Reinforced Carbon Epoxy Composites

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Multiscale Characterization and Modeling of Progressive Failure in Nano-graphene Reinforced Carbon/epoxy Composites

Author : Abhishek Kumar
Publisher :
ISBN 13 :
Total Pages : 157 pages
Book Rating : 4.:/5 (958 download)

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Book Synopsis Multiscale Characterization and Modeling of Progressive Failure in Nano-graphene Reinforced Carbon/epoxy Composites by : Abhishek Kumar

Download or read book Multiscale Characterization and Modeling of Progressive Failure in Nano-graphene Reinforced Carbon/epoxy Composites written by Abhishek Kumar and published by . This book was released on 2016 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation studies the dispersion of nano graphene platelets in thermoset epoxy polymers for improving the mechanical and hygrothermal properties of nano composites and carbon fiber laminates. Barrier properties of graphene were investigated experimentally by adding 0.1-3 weight percentage of nano graphene to EPON 862 polymer and an analytical model for moisture diffusion in presence of nano graphene was derived assuming time-dependent diffusivity and moisture boundary conditions. Experimental studies were conducted for characterizing the fracture properties of 0.1 and 0.5 weight percentage nano graphene reinforced EPON 862 polymer in comparison to the unreinforced polymer. Pure Mode I, mixed mode and pure Mode II fracture experiments were performed. Remarkable improvement in fracture toughness across all modes was observed. Hydrogen passivation of graphene was employed to improve dispersion of nano graphene in epoxy. Graphene alignment was studied under an alternating current electric field. Mode I delamination experiments were conducted on unidirectional carbon fiber laminates with the polymer phase reinforced with small weight percentage of nano graphene. Significant improvements in initiation fracture energy and resistance to crack propagation was observed in nano graphene reinforced laminates. A theory that accounts for ductile to brittle transition in failure mode was developed to explain the nano scale toughness improvements observed in experiments. An analytical model for determining nano graphene size and orientation for maximum toughness enhancement depending on structural loading was derived and implemented in MATLAB. A hierarchical multiscale modeling technique was used to synergistically couple three different length regimes, nano scale (Molecular Dynamics), micro scale (Generalized Method of Cells) and macro scale (Finite Element Analysis), to capture the physics and length scale effects in a general structural problem (e.g. Open Hole Tension specimen). This work lays the foundation for the use of nano graphene composites for structural light weighting in future aerospace and automobile applications.

MULTI-SCALE CHARACTERIZATION AND MODELLING OF NANOSILICA REINFORCED CARBON/EPOXY COMPOSITES FOR FILAMENT WOUND STRUCTURES.

Author : Aniruddh Vashisth
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis MULTI-SCALE CHARACTERIZATION AND MODELLING OF NANOSILICA REINFORCED CARBON/EPOXY COMPOSITES FOR FILAMENT WOUND STRUCTURES. by : Aniruddh Vashisth

Download or read book MULTI-SCALE CHARACTERIZATION AND MODELLING OF NANOSILICA REINFORCED CARBON/EPOXY COMPOSITES FOR FILAMENT WOUND STRUCTURES. written by Aniruddh Vashisth and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber reinforced composite driveshaft are seen as an attractive replacement for metallic driveshaft in helicopters. Rigid matrix composite (RMC) are composites reinforced with a strong fiber such as carbon fibers in a rigid matrix such as an epoxy. Matrix plays an important role in the determining the properties of the fiber composites, for instance mechanical and thermal properties can be tailored by changing molecular structure of the polymer matrix or incorporating nanoparticles in the matrix. The objective of this research is to evaluate, experimentally and analytically, at multiple length scales, the effects of adding spherical nanosilica (NS) particles on the thermomechanical properties of carbon/epoxy composites. Starting from a molecular scale, a novel thermodynamically fundamental mechanism is developed that simulates the cross-linking of epoxide and an aromatic amine (DETDA) curing agent. Good agreement between the simulations and the experimental results were seen for tensile modulus, glass transition temperature, and mass density. The complete simulation procedure, including cross-linking, equilibration and testing of the polymer, was carried out using reactive force fields.Epoxies cured with three different curing agents (3,3-diaminodiphenylsulfone (DDS), 4-4-DDS, and DETDA) were included in all the experiments. Epoxies with variable concentrations of NS were mechanically characterized for modulus, fracture toughness, density, and glass transition temperature. The addition of NS improved the modulus and fracture toughness, although it also decreased the glass transition temperature slightly, possibly due to the diluent component of the master batch of NS-filled bis F. This investigation provides, for the first time, a full set of 2-D lamina properties of T700 carbon fiber composites with 0 wt % NS (0NS) and 37 wt % NS (37NS) cured with DETDA. Equations for predicting the 2D properties as functions of NS and carbon fiber contents were developed using micromechanics principals and backed-out properties of T700 fibers. At the lamina level, NS increased the longitudinal and transverse compression strengths and descreased the transverse coefficient of thermal expansion, which are beneficial for overall composite performance. Using these predictive equations, a simple design exercise was conducted for []5 carbon/epoxy driveshafts with and without NS, considering strength, buckling, torsional stiffness, and whirl. The use of NS improved the safety factors for strength, buckling, and torsional stiffness for all ply angles. However, using NS increased the weight of the shaft and consequently reduced the safety factor for whirl at ply angles less than approximately 60 degrees, which is the realm where NS does not significantly increase the bending stiffness of the shaft due to the dominating effect of the fibers.Tubular specimens with 0, 15, 25 and 34 wt % NS cured with 4,4DDS and 0 and 37 wt % NS cured with DETDA were ballistically impacted at normal incidence and evaluated for damage area and residual torsional strength. This is the first study on NS-filled composites with ballistic impact where the projectile punctures through the composite. Incoporating NS into the composite decreased the projected damage area, increased the residual torsional strength, and increased the energy absorption per unit projected damage area. Specimens manufactured with 15NS/DDS and 25NS/DDS exhibited the highest residual strengths. An analytical model was developed to calculate the damage area and residual projectile velocity after normal-incidence impact. This model is an extension of a previous energy-based model for cross-ply laminates, with original modifications developed for angle plies and dual walls. Good agreement between the experimental and analytical residual velocities was obtained. Analytical and experimental damage areas display a similar trend with NS content, but the analytical damage areas were always less than the experimental areas. Tubular specimens with 0 and 15 wt % NS with DETDA curing agent were obliquely impacted with a ballistic projectile and subjected to residual torsional strength testing. No significant change in damage area or residual torsional strength was seen in these experiments, indicating a negligible effect of NS in an impact scenario where the oblique path of the projectile, rather than the toughness of the composite, is the main factor affecting the size of the damage zone.

Multiscale Characterization and Modeling of Nanosilica-Reinforced Filament Wound Carbon/Epoxy Composite

Author : Aniruddh Vashisth
Publisher :
ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Multiscale Characterization and Modeling of Nanosilica-Reinforced Filament Wound Carbon/Epoxy Composite by : Aniruddh Vashisth

Download or read book Multiscale Characterization and Modeling of Nanosilica-Reinforced Filament Wound Carbon/Epoxy Composite written by Aniruddh Vashisth and published by . This book was released on 2018 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The addition of nanosilica (NS) particles as secondary reinforcement in the matrix of carbon/epoxy composites is known to improve certain matrix-dominated properties. The current investigation characterizes and models the effects of carbon fiber, NS, and void contents on the full set of lamina-level properties of filament wound compound sites. The properties of interest include the orthotropic elastic properties, strengths, and coefficients of thermal expansion. Multiscale modeling of the lamina properties is validated by comparing predicted and measured properties of multidirectionally reinforced filament wound carbon/epoxy tubes with and without NS. A parametric study is conducted to illustrate the effects of variable fiber and NS contents on the lamina-level thermoelastic and strength properties of filament wound carbon/epoxy composites. Inclusion of NS in the matrix is shown to significantly increase the longitudinal and transverse compressive strengths of the carbon/epoxy material.

Mechanical and Dynamic Properties of Biocomposites

Author : Senthilkumar Krishnasamy
Publisher : John Wiley & Sons
ISBN 13 : 3527822321
Total Pages : 336 pages
Book Rating : 4.5/5 (278 download)

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Book Synopsis Mechanical and Dynamic Properties of Biocomposites by : Senthilkumar Krishnasamy

Download or read book Mechanical and Dynamic Properties of Biocomposites written by Senthilkumar Krishnasamy and published by John Wiley & Sons. This book was released on 2021-04-30 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical and Dynamic Properties of Biocomposites A comprehensive review of the properties of biocomposites and their applications Mechanical and Dynamic Properties of Biocomposites offers a comprehensive overview of the mechanical and dynamic properties of biocomposites and natural fiber-reinforced polymer composites. This essential resource helps with materials selection in the development of products in the fields of automotive and aerospace engineering as well as the construction of structures in civil engineering. With contributions from a panel of experts in the field, the book reviews the mechanical and damping properties of lingo-cellulosic fibers and their composites. The authors highlight the factors that contribute to the improved properties and their advancements in modern industrialization. Besides, the book is designed to (a) introduce the mechanical and damping properties of lingo-cellulosic fibers and their composites, (b) factors that contribute to improvement in properties such as hybridization, chemical treatment of natural fibers, additive or fillers, etc. and (c) the real-time applications with case studies and future prospects. Key features: Presents viable alternatives to conventional composites Examines the environmentally friendly and favorable mechanical properties of biocomposites Reviews the potential applications of biocomposites in the fields of automotive, mechanical and civil engineering Brings together in one comprehensive resource information found scattered across the professional literature Written for materials scientists, polymer chemists, chemists in industry, civil engineers, construction engineers, and engineering scientists in industry, Mechanical and Dynamic Properties of BIocomposites offers a compreshensive review of the properties and applications of biocomposites.

MULTISCALE MODELING OF CARBON FIBERS/GRAPHENE NANOPLATELETS/EPOXY HYBRID COMPOSITES FOR AEROSPACE APPLICATIONS

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (115 download)

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Book Synopsis MULTISCALE MODELING OF CARBON FIBERS/GRAPHENE NANOPLATELETS/EPOXY HYBRID COMPOSITES FOR AEROSPACE APPLICATIONS by :

Download or read book MULTISCALE MODELING OF CARBON FIBERS/GRAPHENE NANOPLATELETS/EPOXY HYBRID COMPOSITES FOR AEROSPACE APPLICATIONS written by and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : Significant research effort has been dedicated for decades to improve the mechanical properties of aerospace polymer-based composite materials. Lightweight epoxy-based composite materials have increasingly replaced the comparatively heavy and expensive metal alloys used in aeronautical and aerospace structural components. In particular, carbon fibers (CF)/graphene nanoplatelets (GNP)/epoxy hybrid composites can be used for this purpose owing to their high specific stiffness and strength. Therefore, this work has been completed to design, predict, and optimize the effective mechanical properties of CF/GNP/epoxy composite materials at different length scales using a multiscale modeling approach. The work-flow of modeling involves a first step of using molecular dynamics (MD) with a reactive force field (ReaxFF) to predict the structure and mechanical behavior of the GNP/epoxy materials at the molecular level. A micromechanics approach is then used to model and predict the mechanical properties of the CF/GNP/epoxy hybrid composite at the bulk level. One of the major findings of this study refers to an alignment behavior of phenyl rings in epoxy with the planar GNP surface at the interphase region. This alignment plays an important role to drive the molecular density of epoxy at the interphase and promote the GNP-epoxy interfacial adhesion. The results also validate the use of ReaxFF in MD modeling of such nanocomposites as the predicted properties compare well with experiment. The impact on the mechanical properties of aerospace epoxy materials reinforced with pristine GNP, highly concentrated Graphene Oxide (GO), and Functionalized Graphene Oxide (FGO) has also been investigated in this study. A systematic computational approach to simulate the reinforcing nanoplatelets and probe their influence on the mechanical response of the epoxy matrix at both nanoscale and bulk levels. The nanoscale outcomes indicate a significant degradation in the in-plane elastic and shear moduli of the nanocomposite when introducing large amounts of oxygen and functional groups to the robust sp2 structure of the GNP. However, the wrinkled and rough topology of GO and FGO promotes the nanoplatelet-matrix interlocking mechanism which produces a significant improvement in the out-of-plane shear modulus. In addition, surface functionalization of GNP promotes the nanoplatelet-epoxy interfacial interaction/adhesion significantly which is important for the material toughness. Using micromechanics analysis, the influence of the nanoplatelets content and aspect ratio on the mechanical response of the proposed nanocomposites has also been predicted and validated with experimental data available from the literature. Generally, there is an improvement in the predicted mechanical response of the bulk nanocomposite materials with increasing nanoplatelets content and aspect ratio. The predicted mechanical properties of the nanoplatelet/epoxy nanocomposites are then used to generate hybrid composite models reinforced with unidirectional CF. The micromechanics predictions are used to analyze the reinforcing effect of the proposed nanoplatelets on the unidirectional CF/nanoplatelet/epoxy hybrid composites. Three laminated hybrid composite panels are also modeled and analyzed to address the reinforcing effect of the proposed nanoplatelets on the laminated hybrid composite panels. The predicted mechanical properties of the laminated hybrid composite panels are important in assessing the mechanical performance of in-service structural components.

Characterization of Nanocomposites

Author : Frank Abdi
Publisher : CRC Press
ISBN 13 : 1315341247
Total Pages : 292 pages
Book Rating : 4.3/5 (153 download)

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Book Synopsis Characterization of Nanocomposites by : Frank Abdi

Download or read book Characterization of Nanocomposites written by Frank Abdi and published by CRC Press. This book was released on 2017-03-31 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: These days, advanced multiscale hybrid materials are being produced in the industry, studied by universities, and used in several applications. Unlike for macromaterials, it is difficult to obtain the physical, mechanical, electrical, and thermal properties of nanomaterials because of the scale. Designers, however, must have knowledge of these properties to perform any finite element analysis or durability and damage tolerance analysis. This is the book that brings this knowledge within easy reach. What makes the book unique is the fact that its approach that combines multiscale multiphysics and statistical analysis with multiscale progressive failure analysis. The combination gives a very powerful tool for minimizing tests, improving accuracy, and understanding the effect of the statistical nature of materials, in addition to the mechanics of advanced multiscale materials, all the way to failure. The book focuses on obtaining valid mechanical properties of nanocomposite materials by accurate prediction and observed physical tests, as well as by evaluation of test anomalies of advanced multiscale nanocomposites containing nanoparticles of different shapes, such as chopped fiber, spherical, and platelet, in polymeric, ceramic, and metallic materials. The prediction capability covers delamination, fracture toughness, impact resistance, conductivity, and fire resistance of nanocomposites. The methodology employs a high-fidelity procedure backed with comparison of predictions with test data for various types of static, fatigue, dynamic, and crack growth problems. Using the proposed approach, a good correlation between the simulation and experimental data is established.

Multiscale Characterization of Carbon Fiber-reinforced Epoxy Composites

Author : Christopher B. Montgomery
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (18 download)

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Book Synopsis Multiscale Characterization of Carbon Fiber-reinforced Epoxy Composites by : Christopher B. Montgomery

Download or read book Multiscale Characterization of Carbon Fiber-reinforced Epoxy Composites written by Christopher B. Montgomery and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Multi-scale Characterization and Failure Modeling of Carbon/epoxy Triaxially Braided Composite

Author : Chao Zhang
Publisher :
ISBN 13 :
Total Pages : 206 pages
Book Rating : 4.:/5 (94 download)

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Book Synopsis Multi-scale Characterization and Failure Modeling of Carbon/epoxy Triaxially Braided Composite by : Chao Zhang

Download or read book Multi-scale Characterization and Failure Modeling of Carbon/epoxy Triaxially Braided Composite written by Chao Zhang and published by . This book was released on 2013 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon/Epoxy two-dimensional triaxially braided composites are known to have excellent damage tolerance, energy absorption and impact resistance. Recently, many aircraft manufactures have used such braided composite for engine fan cases. The mechanical interlocking and large unit cell of the fabric architecture enable the material to behave like a structure. On the other hand, this complicated architecture increases the difficulty of experimental characterization and numerical simulation, due to the existence of free edge effect induced premature local damage in standard coupon specimens. The goal of this research is an attempt to identify the damage mechanism of this braided composite, develop analytical and numerical tools to simulate the elastic and failure behavior, and obtain accurate material properties for design of structures and components. Multi-scale modeling is a well established approach in simulating textile composites. In this work, a meso-scale finite element modeling framework is developed to simulate the local and global damage behavior and investigate the failure mechanisms. To achieve the accuracy of the meso-scale model, the micro-scale geometry features are examined in detail to provide support for building a realistic representative model; micromechanical finite element models are developed to predict the material constants of meso-scale fiber tows. On the macro-scale, both analytical models and numerical models are used to predict the global effective stiffness. A comprehensive analysis of the experimentally measured and numerical predicted elastic and strength properties are presented to verify the accuracy of numerical models and evaluate the ability of different types of specimens. The material constants of an infinite large plate are predicted using the numerical models. This can help to make design of structures more efficient and build accurate numerical models representing behavior of braided composites. Particular attention is paid on the analysis of free edge effect which was known to lead to premature local damage and failure. It is found in the numerical studies and confirmed by experiments that the free edge effect can also cause a reduction of effective stiffness. The edge effect that acts in the form of out-of-plane warping is found to be an inherent behavior of the triaxially braided architecture. It is also identified in experiments that some material properties may depend on the coupon width, especially in transversely loaded specimens. Through a numerical dimensional analysis, the relationship of specimen width and effective stiffness and strength is quantified. The long-term performance of the material is also studied by conducting thermal cycling test. Acoustic Emission and X-ray CT scanning are used to detect the aging induced microcracking damage behavior and predict the saturation number of thermal cycles. Multi-scale finite element models are utilized to predict the degradation of mechanical properties and impact resistance of microcracked braided composite panels.

Modeling, Processing, Fabrication and Characterization of Carbon Nanomaterials-Reinforced Polymer Composites

Author : Mohammad Rafiee
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (129 download)

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Book Synopsis Modeling, Processing, Fabrication and Characterization of Carbon Nanomaterials-Reinforced Polymer Composites by : Mohammad Rafiee

Download or read book Modeling, Processing, Fabrication and Characterization of Carbon Nanomaterials-Reinforced Polymer Composites written by Mohammad Rafiee and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber and matrix-dominant properties of fiber-reinforced polymer composites are important in many advanced technological fields, such as aviation, aerospace, transportation, energy industry, etc. Still, pre-mixing the polymer matrix with nanoparticles may enhance the through-thickness or matrix-dominant properties, and surface treatment of fiber reinforcements with nanoparticles, on the other hand, may improve the in-plane or fiber-dominated properties of laminated composites, as well as interfacial adhesion. A novel manufacturing method that combines a spraying process with nanoparticle/epoxy mixture technique was introduced to incorporate carbon nanoparticles for enhancement of thermal properties of multiscale laminates. Several graphene-based nanomaterials including graphene oxide (GO), reduced graphene oxide (rGO), graphene nanoplatelets (GNPs) and multi-walled carbon nanotubes (MWCNTs) were employed to modify the epoxy matrix and the surface of glass fibers. Multiscale glass fiber-reinforced composites were fabricated from unmodified and modified epoxy, as well as fibers, using the vacuum-assisted resin transfer molding (VARTM) process. The composites obtained combined improvements in both the fiber and matrix- dominant properties, resulting in superior composites. The morphological, rheological, thermal and mechanical properties of the glass fiber-reinforced multiscale composites were investigated. The thermal properties of the epoxy/nanoparticle composites were studied through differential scanning calorimetry (DSC), thermo-gravimetric analysis (TGA) and thermal conductivity measurements. The tensile, bending, vibration, interlaminar shear strength (ILSS) and thermal characterization results indicated that the introduction of GNPs, GO, rGO, and MWCNTs enhanced the themo-mechanical properties. The fracture surfaces of the fiber-reinforced composites were examined by scanning electron microscopy (SEM) and the micrographs were analyzed to comment on the mechanical results.

Multiscale Modeling of Damage Evolution in Nanographene Reinforced Epoxy Polymer Using the Internal State Variable Approach

Author : Ankit Srivastav
Publisher :
ISBN 13 :
Total Pages : 280 pages
Book Rating : 4.:/5 (131 download)

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Book Synopsis Multiscale Modeling of Damage Evolution in Nanographene Reinforced Epoxy Polymer Using the Internal State Variable Approach by : Ankit Srivastav

Download or read book Multiscale Modeling of Damage Evolution in Nanographene Reinforced Epoxy Polymer Using the Internal State Variable Approach written by Ankit Srivastav and published by . This book was released on 2015 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work done in this thesis aims to improve understanding of advanced multifunctional nanocomposite materials by developing physics-based multi-scale model of nanoparticle reinforced polymer matrix composites in order to accelerate their implementation into aircraft structural applications. These objectives of material development are addressed through the use of computational material modeling. In this regard, a novel technique to model damage and damage evolution in polymer nanocomposites (PNC's) using the Internal State Variable (ISV) approach is proposed. The multi-scale aspects of the nanocomposite are captured by embedding local inhomogeneities and the localized nanoparticle (nanographene) and polymer atom interactions at the interface into a continuum scale model. This approach assumes that the damage evolution is primarily due to changes in non-bonded interactions at the nanoscale (nanoscale-informed damage mechanics model or NIDM model). The NIDM model attempts to (a) capture the stiffness and strength enhancements due to nanoscale reinforcement of graphene by tracking the change in Helmholtz free energy of nanocomposite over baseline polymer and (b) models the stiffness degradation using an internal state variable (ISV) approach based on the fundamental thermodynamic principles of damage mechanics. The unknown coefficients in the NIDM model are obtained by a least squares fit of the PNC stress-strain behavior using molecular dynamics (MD) simulations. It is envisioned that the damage model can be easily incorporated into a FEA algorithm and used by NASA and the aerospace industry for structural design applications.

Experimental Characterization and Multiscale Modeling of the Deformation and Fracture Behavior of Carbon Nanofiller Reinforced Polymer Nanocomposites

Download Experimental Characterization and Multiscale Modeling of the Deformation and Fracture Behavior of Carbon Nanofiller Reinforced Polymer Nanocomposites PDF Online Free

Author : Yueqi Hu
Publisher :
ISBN 13 :
Total Pages : 144 pages
Book Rating : 4.:/5 (14 download)

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Book Synopsis Experimental Characterization and Multiscale Modeling of the Deformation and Fracture Behavior of Carbon Nanofiller Reinforced Polymer Nanocomposites by : Yueqi Hu

Download or read book Experimental Characterization and Multiscale Modeling of the Deformation and Fracture Behavior of Carbon Nanofiller Reinforced Polymer Nanocomposites written by Yueqi Hu and published by . This book was released on 2017 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: To achieve the research objective, the mechanical behavior of a High Density Polyethylene (HDPE)-based composite reinforced with CNT, CNF, and GNP is processed and characterized first. The load spectrum spreads over both tension and compression for a wide range of strain rates, 10-2-10 4/s. This part of the work establishes a data base for this research. Following the experiment work, molecular dynamics simulations are used to gain insights on the mechanical characteristics and reinforcement mechanisms of different types of carbon nanofillers. Finally, a mesoscale finite element study is performed to understand the correlation between the reinforcement mechanism and the overall performance of the resultant composites.

Mechanical properties of graphene nanoplatelet/carbon fiber/epoxy hybrid composites

Author : C. M. Hadden
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (936 download)

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Book Synopsis Mechanical properties of graphene nanoplatelet/carbon fiber/epoxy hybrid composites by : C. M. Hadden

Download or read book Mechanical properties of graphene nanoplatelet/carbon fiber/epoxy hybrid composites written by C. M. Hadden and published by . This book was released on 2015 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Engineered Interfaces in Fiber Reinforced Composites

Author : Jang-Kyo Kim
Publisher : Elsevier
ISBN 13 : 0080530974
Total Pages : 416 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Engineered Interfaces in Fiber Reinforced Composites by : Jang-Kyo Kim

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.

The Structural Integrity of Carbon Fiber Composites

Author : Peter W. R Beaumont
Publisher : Springer
ISBN 13 : 3319461206
Total Pages : 954 pages
Book Rating : 4.3/5 (194 download)

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Book Synopsis The Structural Integrity of Carbon Fiber Composites by : Peter W. R Beaumont

Download or read book The Structural Integrity of Carbon Fiber Composites written by Peter W. R Beaumont and published by Springer. This book was released on 2016-11-26 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together a diverse compilation of inter-disciplinary chapters on fundamental aspects of carbon fiber composite materials and multi-functional composite structures: including synthesis, characterization, and evaluation from the nano-structure to structure meters in length. The content and focus of contributions under the umbrella of structural integrity of composite materials embraces topics at the forefront of composite materials science and technology, the disciplines of mechanics, and development of a new predictive design methodology of the safe operation of engineering structures from cradle to grave. Multi-authored papers on multi-scale modelling of problems in material design and predicting the safe performance of engineering structure illustrate the inter-disciplinary nature of the subject. The book examines topics such as Stochastic micro-mechanics theory and application for advanced composite systems Construction of the evaluation process for structural integrity of material and structure Nano- and meso-mechanics modelling of structure evolution during the accumulation of damage Statistical meso-mechanics of composite materials Hierarchical analysis including "age-aware," high-fidelity simulation and virtual mechanical testing of composite structures right up to the point of failure. The volume is ideal for scientists, engineers, and students interested in carbon fiber composite materials, and other composite material systems.

Micromechanics of Composite Materials

Author : Jacob Aboudi
Publisher : Butterworth-Heinemann
ISBN 13 : 0123970350
Total Pages : 1032 pages
Book Rating : 4.1/5 (239 download)

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Book Synopsis Micromechanics of Composite Materials by : Jacob Aboudi

Download or read book Micromechanics of Composite Materials written by Jacob Aboudi and published by Butterworth-Heinemann. This book was released on 2013 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: A Generalized Multiscale Analysis Approach brings together comprehensive background information on the multiscale nature of the composite, constituent material behaviour, damage models and key techniques for multiscale modelling, as well as presenting the findings and methods, developed over a lifetime's research, of three leading experts in the field. The unified approach presented in the book for conducting multiscale analysis and design of conventional and smart composite materials is also applicable for structures with complete linear and nonlinear material behavior, with numerous applications provided to illustrate use. Modeling composite behaviour is a key challenge in research and industry; when done efficiently and reliably it can save money, decrease time to market with new innovations and prevent component failure.

3D Fibre Reinforced Polymer Composites

Author : L. Tong
Publisher : Elsevier
ISBN 13 : 0080525822
Total Pages : 255 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis 3D Fibre Reinforced Polymer Composites by : L. Tong

Download or read book 3D Fibre Reinforced Polymer Composites written by L. Tong and published by Elsevier. This book was released on 2002-11-20 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fibre reinforced polymer (FRP) composites are used in almost every type of advanced engineering structure, with their usage ranging from aircraft, helicopters and spacecraft through to boats, ships and offshore platforms and to automobiles, sports goods, chemical processing equipment and civil infrastructure such as bridges and buildlings. The usage of FRP composites continues to grow at an impessive rate as these materials are used more in their existing markets and become established in relatively new markets such as biomedical devices and civil structures. A key factor driving the increased applications of composites over the recent years is the development of new advanced forms of FRP materials. This includes developments in high performance resin systems and new styles of reinforcement, such as carbon nanotubes and nanoparticles. This book provides an up-to-date account of the fabrication, mechanical properties, delamination resistance, impact tolerance and applications of 3D FRP composites. The book focuses on 3D composites made using the textile technologies of weaving, braiding, knitting and stiching as well as by z-pinning.

Uncertainty Quantification in Laminated Composites

Author : Sudip Dey
Publisher : CRC Press
ISBN 13 : 1498784461
Total Pages : 375 pages
Book Rating : 4.4/5 (987 download)

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Book Synopsis Uncertainty Quantification in Laminated Composites by : Sudip Dey

Download or read book Uncertainty Quantification in Laminated Composites written by Sudip Dey and published by CRC Press. This book was released on 2018-09-19 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last few decades, uncertainty quantification in composite materials and structures has gained a lot of attention from the research community as a result of industrial requirements. This book presents computationally efficient uncertainty quantification schemes following meta-model-based approaches for stochasticity in material and geometric parameters of laminated composite structures. Several metamodels have been studied and comparative results have been presented for different static and dynamic responses. Results for sensitivity analyses are provided for a comprehensive coverage of the relative importance of different material and geometric parameters in the global structural responses.