Constitutive Modeling of Nanotube-reinforced Polymer Composite Systems

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ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Constitutive Modeling of Nanotube-reinforced Polymer Composite Systems by : Gregory M. Odegard

Download or read book Constitutive Modeling of Nanotube-reinforced Polymer Composite Systems written by Gregory M. Odegard and published by . This book was released on 2001 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a technique has been proposed for developing constitive models for polymer composite systems reinforced with single-walled carbon nanotubes (SWNT). Since the polymer molecules are on the same size scale as the nanotubes, the interaction at the polymer/nanotube interface is highly dependent on the local molecular structure and bonding. At these small length scales, the lattice structures of the nanotube and polymer chains cannot be be considered continuous, and the bulk mechanical properties of the SWNT/polymer composites can no longer be determined through traditional micromechanical approaches that are formulated using continuum mechanics. It is proposed herein that the nanotube, the local polymer near the nanotube, and the nanotube/polymer interface can be modeled as an effective continuum fiber using an equivalent-continuum modeling method.

Constitutive Modeling of Nanotube-Reinforced Polymer Composites

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Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781720451501
Total Pages : 36 pages
Book Rating : 4.4/5 (515 download)

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Book Synopsis Constitutive Modeling of Nanotube-Reinforced Polymer Composites by : National Aeronautics and Space Administration (NASA)

Download or read book Constitutive Modeling of Nanotube-Reinforced Polymer Composites written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a technique is presented for developing constitutive models for polymer composite systems reinforced with single-walled carbon nanotubes (SWNT). Because the polymer molecules are on the same size scale as the nanotubes, the interaction at the polymer/nanotube interface is highly dependent on the local molecular structure and bonding. At these small length scales, the lattice structures of the nanotube and polymer chains cannot be considered continuous, and the bulk mechanical properties can no longer be determined through traditional micromechanical approaches that are formulated by using continuum mechanics. It is proposed herein that the nanotube, the local polymer near the nanotube, and the nanotube/polymer interface can be modeled as an effective continuum fiber using an equivalent-continuum modeling method. The effective fiber serves as a means for incorporating micromechanical analyses for the prediction of bulk mechanical properties of SWNT/polymer composites with various nanotube lengths, concentrations, and orientations. As an example, the proposed approach is used for the constitutive modeling of two SWNT/polyimide composite systems.Odegard, G. M. and Gates, T. S. and Wise, K. E. and Park, C. and Siochi, E. J. and Bushnell, Dennis M. (Technical Monitor)Langley Research CenterCARBON NANOTUBES; POLYMERS; MOLECULAR STRUCTURE; BONDING; COMPOSITE STRUCTURES; CONTINUUM MODELING; MATHEMATICAL MODELS; MECHANICAL PROPERTIES; MOLECULAR CHAINS; POLYIMIDES

Constitutive Modeling of Nanotube-Reinforced Polymer Composite Systems

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Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721268702
Total Pages : 32 pages
Book Rating : 4.2/5 (687 download)

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Book Synopsis Constitutive Modeling of Nanotube-Reinforced Polymer Composite Systems by : National Aeronautics and Space Administration (NASA)

Download or read book Constitutive Modeling of Nanotube-Reinforced Polymer Composite Systems written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-20 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a technique has been proposed for developing constitutive models for polymer composite systems reinforced with single-walled carbon nanotubes (SWNT). Since the polymer molecules are on the same size scale as the nanotubes, the interaction at the polymer/nanotube interface is highly dependent on the local molecular structure and bonding. At these small length scales, the lattice structures of the nanotube and polymer chains cannot be considered continuous, and the bulk mechanical properties of the SWNT/polymer composites can no longer be determined through traditional micromechanical approaches that are formulated using continuum mechanics. It is proposed herein that the nanotube, the local polymer near the nanotube, and the nanotube/polymer interface can be modeled as an effective continuum fiber using an equivalent-continuum modeling method. The effective fiber retains the local molecular structure and bonding information and serves as a means for incorporating micromechanical analyses for the prediction of bulk mechanical properties of SWNT/polymer composites with various nanotube sizes and orientations. As an example, the proposed approach is used for the constitutive modeling of two SWNT/polyethylene composite systems, one with continuous and aligned SWNT and the other with discontinuous and randomly aligned nanotubes. Odegard, Gregory M. and Harik, Vasyl M. and Wise, Kristopher E. and Gates, Thomas S. Langley Research Center NASA/TM-2001-211044, L-18094, NAS 1.15:211044

Constitutive Modeling of Nanotube-Reinforced Polymer Composites

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ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Constitutive Modeling of Nanotube-Reinforced Polymer Composites by : G. M. Odegard

Download or read book Constitutive Modeling of Nanotube-Reinforced Polymer Composites written by G. M. Odegard and published by . This book was released on 2002 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a technique is presented for developing constitutive models for polymer composite systems reinforced with single-walled carbon nanotubes (SWNT). Because the polymer molecules are on the same size scale as the nanotubes, the interaction at the polymer/nanotube interface is highly dependent on the local molecular structure and bonding. At these small length scales, the lattice structures of the nanotube and polymer chains cannot be considered continuous, and the bulk mechanical properties can no longer be determined through the traditional micromechanical approaches that are formulated by using continuum mechanics. It is proposed herein that the nanotube, the local polymer near the nanotube, and the nanotube/polymer interface can be modeled as an effective continuum fiber using an equivalent-continuum modeling method. The micromechanical analyses for the prediction of bulk mechanical properties of SWNT/polymer composites with various nanotube lengths, concentrations, and orientations. As an example, the proposed approach is used for the constitutive modeling of two SWNT/polyimide composite systems.

Constitutive Modeling of Nanotube-reinforced Polymer Composite Systems ... Nasa

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (639 download)

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Book Synopsis Constitutive Modeling of Nanotube-reinforced Polymer Composite Systems ... Nasa by : United States. National Aeronautics and Space Administration

Download or read book Constitutive Modeling of Nanotube-reinforced Polymer Composite Systems ... Nasa written by United States. National Aeronautics and Space Administration and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Carbon Nanotube-Reinforced Polymers

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Publisher : Elsevier
ISBN 13 : 0323482228
Total Pages : 588 pages
Book Rating : 4.3/5 (234 download)

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Book Synopsis Carbon Nanotube-Reinforced Polymers by : Roham Rafiee

Download or read book Carbon Nanotube-Reinforced Polymers written by Roham Rafiee and published by Elsevier. This book was released on 2017-10-06 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Nanotube-Reinforced Polymers: From Nanoscale to Macroscale addresses the advances in nanotechnology that have led to the development of a new class of composite materials known as CNT-reinforced polymers. The low density and high aspect ratio, together with their exceptional mechanical, electrical and thermal properties, render carbon nanotubes as a good reinforcing agent for composites. In addition, these simulation and modeling techniques play a significant role in characterizing their properties and understanding their mechanical behavior, and are thus discussed and demonstrated in this comprehensive book that presents the state-of-the-art research in the field of modeling, characterization and processing. The book separates the theoretical studies on the mechanical properties of CNTs and their composites into atomistic modeling and continuum mechanics-based approaches, including both analytical and numerical ones, along with multi-scale modeling techniques. Different efforts have been done in this field to address the mechanical behavior of isolated CNTs and their composites by numerous researchers, signaling that this area of study is ongoing. Explains modeling approaches to carbon nanotubes, together with their application, strengths and limitations Outlines the properties of different carbon nanotube-based composites, exploring how they are used in the mechanical and structural components Analyzes the behavior of carbon nanotube-based composites in different conditions

Recueil des actes de la Société de santé de Lyon depuis l'an Ier jusqu'à l'an V de la République, et depuis l'an VI jusqu'à la fin de l'an IX.

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (45 download)

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Book Synopsis Recueil des actes de la Société de santé de Lyon depuis l'an Ier jusqu'à l'an V de la République, et depuis l'an VI jusqu'à la fin de l'an IX. by :

Download or read book Recueil des actes de la Société de santé de Lyon depuis l'an Ier jusqu'à l'an V de la République, et depuis l'an VI jusqu'à la fin de l'an IX. written by and published by . This book was released on 1798 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Carbon Nanotube-Reinforced Polymers

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Publisher : Elsevier
ISBN 13 : 9780323482219
Total Pages : 608 pages
Book Rating : 4.4/5 (822 download)

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Book Synopsis Carbon Nanotube-Reinforced Polymers by : Roham Rafiee

Download or read book Carbon Nanotube-Reinforced Polymers written by Roham Rafiee and published by Elsevier. This book was released on 2017-10-01 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in nanotechnology have led to the development of a new class of composite materials known as CNT-reinforced polymers. The low density and high aspect ratio, together with their exceptional mechanical, electrical and thermal properties, render carbon nanotubes as a good reinforcing agent for composites. The experimental measurement of CNT properties is a challenging and tedious task. Extremely scattered data obtained through experimental observations originated from different imposed limitations and obstacles have encouraged many researchers to pursue a variety of theoretical studies on the effective properties of CNTs and their corresponding composites. Consequently, simulation and modeling techniques play a significant role in characterizing their properties and understanding their mechanical behavior. Reasonable analysis of their behavior obtained through modeling and simulation will provide insight into their future potential applications. Thus, there is a vital demand of understanding properties of CNT-based composites in their design and analysis procedure. The theoretical studies on the mechanical properties of CNTs and also their composites are divided into atomistic modeling, continuum mechanics-based approaches including both analytical and numerical ones and also multi-scale modeling techniques. Different efforts have been done in this field to address the mechanical behavior of isolated CNTs and their composites by numerous researchers and this area of study is still ongoing. Carbon Nanotubes, from Nanoscale to Macrosacle presents state-of-the-art research in the field of modeling, characterization and processing of these materials with a mechanical emphasis. Explains modelling approaches to Carbon Nanotubes, together with their application, strength, and limitations, Outlines the properties of different carbon nanotube-based composites, exploring how they are used in the mechanical and structural components Analyses the behavior of carbon nanotube-based composites in different conditions

Carbon Nanotube-Polymer Composites

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Author :
Publisher : Royal Society of Chemistry
ISBN 13 : 1782625828
Total Pages : 293 pages
Book Rating : 4.7/5 (826 download)

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Book Synopsis Carbon Nanotube-Polymer Composites by : Dimitrios Tasis

Download or read book Carbon Nanotube-Polymer Composites written by Dimitrios Tasis and published by Royal Society of Chemistry. This book was released on 2015-11-09 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemically-modified carbon nanotubes (CNTs) exhibit a wide range of physical and chemical properties which makes them an attractive starting material for the preparation of super-strong and highly-conductive fibres and films. Much information is available across the primary literature, making it difficult to obtain an overall picture of the state-of-the-art. This volume brings together some of the leading researchers in the field from across the globe to present the potential these materials have, not only in developing and characterising novel materials but also the devices which can be fabricated from them. Topics featured in the book include Raman characterisation, industrial polymer materials, actuators and sensors and polymer reinforcement, with chapters prepared by highly-cited authors from across the globe. A valuable handbook for any academic or industrial laboratory, this book will appeal to newcomers to the field and established researchers alike.

Rate Dependent Constitutive Models for Fiber Reinforced Polymer Composites

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Publisher : Independently Published
ISBN 13 : 9781728893273
Total Pages : 32 pages
Book Rating : 4.8/5 (932 download)

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Book Synopsis Rate Dependent Constitutive Models for Fiber Reinforced Polymer Composites by : National Aeronautics and Space Adm Nasa

Download or read book Rate Dependent Constitutive Models for Fiber Reinforced Polymer Composites written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-17 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A literature survey was conducted to assess the state-of-the-art in rate dependent constitutive models for continuous fiber reinforced polymer matrix composite (PMC) materials. Several recent models which include formulations for describing plasticity, viscoelasticity, viscoplasticity, and rate-dependent phenomenon such as creep and stress relaxation are outlined and compared. When appropriate, these comparisons include brief descriptions of the mathematical formulations, the test procedures required for generating material constants, and details of available data comparing test results to analytical predictions. Gates, Thomas S. Langley Research Center RTOP 505-63-01-05...

Thermomechanical Constitutive Modeling of Irradiated Fiber Reinforced Polymer Composites

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Publisher :
ISBN 13 :
Total Pages : 436 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Thermomechanical Constitutive Modeling of Irradiated Fiber Reinforced Polymer Composites by : Chen-Ping Chao

Download or read book Thermomechanical Constitutive Modeling of Irradiated Fiber Reinforced Polymer Composites written by Chen-Ping Chao and published by . This book was released on 1994 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Carbon Nanotube Reinforced Composites

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Publisher : Elsevier
ISBN 13 : 145573196X
Total Pages : 305 pages
Book Rating : 4.4/5 (557 download)

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Book Synopsis Carbon Nanotube Reinforced Composites by : Marcio Loos

Download or read book Carbon Nanotube Reinforced Composites written by Marcio Loos and published by Elsevier. This book was released on 2014-09-11 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Nanotube Reinforced Composites introduces a wide audience of engineers, scientists and product designers to this important and rapidly expanding class of high performance composites. Dr Loos provides readers with the scientific fundamentals of carbon nanotubes (CNTs), CNT composites and nanotechnology in a way which will enable them to understand the performance, capability and potential of the materials under discussion. He also investigates how CNT reinforcement can be used to enhance the mechanical, electrical and thermal properties of polymer composites. Production methods, processing technologies and applications are fully examined, with reference to relevant patents. Finally, health and safety issues related to the use of CNTs are investigated. Dr. Loos compares the theoretical expectations of using CNTs to the results obtained in labs, and explains the reasons for the discrepancy between theoretical and experimental results. This approach makes the book an essential reference and practical guide for engineers and product developers working with reinforced polymers – as well as researchers and students in polymer science, materials and nanotechnology. A wealth of applications information is included, taken from the wide range of industry sectors utilizing CNT reinforced composites, such as energy, coatings, defense, electronics, medical devices, and high performance sports equipment. Introduces a wide range of readers involved in plastics engineering, product design and manufacturing to the relevant topics in nano-science, nanotechnology, nanotubes and composites. Assesses effects of CNTs as reinforcing agents, both in a materials context and an applications setting. Focuses on applications aspects – performance, cost, health and safety, etc – for a wide range of industry sectors, e.g. energy, coatings, defense, electronics, medical devices, high performance sports equipment, etc.

Finite Element Modeling of Carbon Nanotube Reinforced Polymer Composites and Evaluating Its Thermal Conductivities

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Publisher :
ISBN 13 : 9780542946585
Total Pages : pages
Book Rating : 4.9/5 (465 download)

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Book Synopsis Finite Element Modeling of Carbon Nanotube Reinforced Polymer Composites and Evaluating Its Thermal Conductivities by : Raghuram Basavanahalli

Download or read book Finite Element Modeling of Carbon Nanotube Reinforced Polymer Composites and Evaluating Its Thermal Conductivities written by Raghuram Basavanahalli and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High thermal conductivity of carbon nanotubes has motivated us to study and understand the thermal mechanisms in nanocomposites. Though several theoretical models predict a high thermal conductivity for CNT reinforced polymer composites, the experimental validation are not so encouraging. A finite element model of MWNT reinforced nanocomposite is developed based on continuum mechanics approach. The finite element model is a representative volume element (RVE) with single MWNT inclusion. The inclusion is modeled based on the continuum model of MWNT as effective solid fiber [22]. The interface resistance between the nanotube and the matrix material is modeled using thermal contact elements. The finite element analysis was carried out keeping volume fraction of MWNT fibers as constant and varying three important parameters which influences the effective thermal conductivity. Analysis with varying volume fractions of CNT fibers was also carried out to study the influence of volume fraction. The results obtained were in agreeable range with the theoretical calculations made based on the work of Bagchi and Nomura [22]. The effective thermal conductivity of MWNT reinforced nanocomposites with MWNTs of high aspect ratios showed gradual increase in conductivity with increase in length while it showed a drastic decrease in effective thermal conductivity with increase in the diameter of the MWNT inclusion. The finite element analysis showed that the interface resistance between the nanotube and the matrix material does not affect effective thermal conductivity noticeably which is contradictory with few theoretical models which attribute interface resistance for lower than expected effective thermal conductivity. The analysis predicts linear increase of effective thermal conductivity with increase in volume fraction of the MWNT fibers in matrix material; this is also in accordance with the theoretical model. The above analysis also validates the use of finite element approach based on continuum mechanics in studying the overall behavior of the nanocomposites.

Finite Element Analysis of Composite Materials using AbaqusTM

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Publisher : CRC Press
ISBN 13 : 1466516631
Total Pages : 444 pages
Book Rating : 4.4/5 (665 download)

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Book Synopsis Finite Element Analysis of Composite Materials using AbaqusTM by : Ever J. Barbero

Download or read book Finite Element Analysis of Composite Materials using AbaqusTM written by Ever J. Barbero and published by CRC Press. This book was released on 2013-04-18 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed from the author's graduate-level course on advanced mechanics of composite materials, Finite Element Analysis of Composite Materials with Abaqus shows how powerful finite element tools address practical problems in the structural analysis of composites. Unlike other texts, this one takes the theory to a hands-on level by actually solving

Theory and Modeling of Polymer Nanocomposites

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Publisher : Springer Nature
ISBN 13 : 3030604438
Total Pages : 330 pages
Book Rating : 4.0/5 (36 download)

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Book Synopsis Theory and Modeling of Polymer Nanocomposites by : Valeriy V. Ginzburg

Download or read book Theory and Modeling of Polymer Nanocomposites written by Valeriy V. Ginzburg and published by Springer Nature. This book was released on 2020-12-16 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume brings together the state of the art in polymer nanocomposite theory and modeling, creating a roadmap for scientists and engineers seeking to design new advanced materials. The book opens with a review of molecular and mesoscale models predicting equilibrium and non-equilibrium nanoscale structure of hybrid materials as a function of composition and, especially, filler types. Subsequent chapters cover the methods and analyses used for describing the dynamics of nanocomposites and their mechanical and physical properties. Dedicated chapters present best practices for predicting materials properties of practical interest, including thermal and electrical conductivity, optical properties, barrier properties, and flammability. Each chapter is written by leading academic and industrial scientists working in each respective sub-field. The overview of modeling methodology combined with detailed examples of property predictions for specific systems will make this book useful for academic and industrial practitioners alike.

Prediction of Elastic Properties of a Carbon Nanotube Reinforced Fiber Polymeric Composite Material Using Cohesive Zone Modeling

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ISBN 13 :
Total Pages : 93 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Prediction of Elastic Properties of a Carbon Nanotube Reinforced Fiber Polymeric Composite Material Using Cohesive Zone Modeling by :

Download or read book Prediction of Elastic Properties of a Carbon Nanotube Reinforced Fiber Polymeric Composite Material Using Cohesive Zone Modeling written by and published by . This book was released on 2009 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber composite materials are ideal engineered materials to carry loads and stresses in the fiber direction due to their high in-plane specific mechanical properties. However, premature failure due to low transverse mechanical properties constitutes a fundamental weakness of composites. A solution to this problem is being addressed through the creation of a nano-reinforced laminated composite (NRLC) materials where carbon nanotubes (CNTs) are grown on the surface of the fiber filaments to improve the matrix-dominated properties. The carbon nanotubes increase the effective diameter of the fiber and provide a much larger interface area for the polymeric matrix to wet the fiber. The objective of this thesis work is to numerically predict the elastic properties of these nano-reinforced fiber composites. Finite Element Method (FEM) is used to evaluate the effective mechanical properties employing a 2D and 3D cylindrical representative volume element (RVE) based on multiscale modeling approach. In continuum mechanics, perfect bonding is assumed between the carbon fiber and the polymer matrix and between the carbon nanotubes and the polymer matrix. In the multiscale modeling approach in this work, cohesive zone approach is employed to model the interface between carbon fiber and polymer matrix and between the CNTs and the polymer matrix. Traction-displacement plots obtained from molecular dynamics simulations are used to derive the constitutive properties of the cohesive zone material model used for CNT-Polymer interface. For NRLC, the cohesive zone material model properties are assumed based on the information found in the literature. Effective material constants are extracted from the solutions of the RVE for different loading cases using theory of elasticity of isotropic and transversely isotropic materials. Experimental mechanical characterization data is used for correlation and validation of numerical results. It is observed that the cohesive zone material model is capable of capturing the interface behavioral details and provides more realistic results for the mechanical response of composite materials. Experimental results show that the potential improvement in matrix-dominated properties of the NRLC suggested by the numerical study can be realized only with the availability of improved and sophisticated NRLC fabrication techniques.

Characterization of Nanocomposites

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Publisher : CRC Press
ISBN 13 : 9814669032
Total Pages : 509 pages
Book Rating : 4.8/5 (146 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 509 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.