Cohesive Zone Model Approach to Multiscale Modeling of Nanotube Reinforced Composites

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)

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Book Synopsis Cohesive Zone Model Approach to Multiscale Modeling of Nanotube Reinforced Composites by :

Download or read book Cohesive Zone Model Approach to Multiscale Modeling of Nanotube Reinforced Composites written by and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our primary focus in this to apply the concept of cohesive zone models to link atomistic effect within a continuum based multi-scale model. We have used this approach to consider the effect of interfaces in carbon nanotubes on the properties of CNT based polymer matrix composites.

Cohesive Zone Approach to Multiscale Modeling of Nanotube Reinforced Composites

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ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Cohesive Zone Approach to Multiscale Modeling of Nanotube Reinforced Composites by :

Download or read book Cohesive Zone Approach to Multiscale Modeling of Nanotube Reinforced Composites written by and published by . This book was released on 2007 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: This one year effort demonstrated that cohesive zone model can be adapted within a multi-scale approach to study the fracture behavior of carbon-nanotube (CNT) based polymer based composites. Some of the fundamental cohesive zone parameters like traction and displacement were computed using molecular dynamics and the results used in a non-linear finite element method to study the fracture characteristics of the CNT based composites. A new type of cohesive zone finite element was developed, and the element showed both numerical stability and accuracy. It was clearly shown using the developed method that unless the interface strength and fracture characteristics are properly controlled, the full capability of CNTs in composites could not be exploited. For example, simple carbon nano-fibers (a few micron in diameter) will outperform ONT based composites, if the former has better interface thermo-mechanical properties than the latter. Controlling atomic scale interfaces is however much more difficult and follow up work showed novel neutron bombardment and selective defect creation can achieve this. The present work paved way for breakthroughs in processing.

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.

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.

Characterization of Carbon-Nanotube-Reinforced-Polymer-Composite Material Based on Multiscale Finite Element Model and Probabilistic Approach

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)

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Book Synopsis Characterization of Carbon-Nanotube-Reinforced-Polymer-Composite Material Based on Multiscale Finite Element Model and Probabilistic Approach by : Jorge Alberto Palacios Moreno

Download or read book Characterization of Carbon-Nanotube-Reinforced-Polymer-Composite Material Based on Multiscale Finite Element Model and Probabilistic Approach written by Jorge Alberto Palacios Moreno and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon-Nanotube-Reinforced-Polymer-Composite (CNRPC) materials have generated widespread interest over the last several years in practical engineering applications, such as aeronautical and aerospace engineering structures. However, studies still need to be carried out to characterize their mechanical properties, especially the dynamic properties, and the effects of defects on the mechanical properties. Experimental investigations intended for this purpose have limitations and, in most cases, reliable cost-effective experimental work could not be carried out. Computational modelling and simulation encompassing multiscale material behavior provide an alternate approach in this regard to characterize the material behavior. A probabilistic approach serves as a suitable approach to characterize the effects of material and structural defects. The present thesis reports the development of a computational framework of the Representative Volume Element (RVE) of a CNRPC material model to determine its static and dynamic responses, and also for the evaluation of its static and dynamic reliabilities based on a probabilistic characterization approach. A 3D multiscale finite element model of the RVE of the nanocomposite material consisting of a polymer matrix, a Single-Walled-Carbon-Nanotube (SWCN) and an interface region has been constructed for this purpose. The multiscale modeling is performed in terms of using different theories and corresponding strain energies to model the individual parts of the RVE of the CNRPC material. The macroscale continuum mechanics is used for the polymer matrix, the mesoscale mechanics is used for the interface region, and the nanoscale-level atomistic mechanics is used for the SWCN. The polymer matrix is modeled using the Mooney-Rivlin strain energy function to calculate its non-linear response, while the interface region is modeled via the van der Waals links. The SWCN is first modeled as a space frame structure by using the Morse potential, and then as a thin shell based on a suitable shell theory. For this purpose, the suitability and the accuracy of popular shell theories for use in the multiscale model of the RVE are assessed.

Multiscale Modeling of Multifunctional Carbon Nanotube Reinforced Polymer Composites

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (133 download)

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Book Synopsis Multiscale Modeling of Multifunctional Carbon Nanotube Reinforced Polymer Composites by : AHMED ROWAEY Rowaey Abdelazeam ALIAN

Download or read book Multiscale Modeling of Multifunctional Carbon Nanotube Reinforced Polymer Composites written by AHMED ROWAEY Rowaey Abdelazeam ALIAN and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, novel multiscale modeling techniques have been successfully developed to study multifunctional nanocomposite polymeric materials. Interfacial, mechanical, electrical, and piezoresistive properties of carbon nanotube (CNT)-reinforced polymer composites were investigated using molecular dynamics (MD), micromechanics, and coupled electromechanical modeling techniques. Additionally, scanning electron microscopy was used to determine the morphology and dispersion state of a typical CNT-epoxy composite. Based on these measurements, realistic nanocomposite structures were modeled using representative volume elements (RVEs) reinforced by CNTs with different aspect ratios, curvatures, orientations, alignment angles, and bundle sizes. At the nanoscale level, the interfacial shear strength was determined via pull-out MD simulations. Additionally, the stiffness constants of a pure polymer, pristine and defective CNTs, and an effective fiber consisting of a CNT and a surrounding layer of polymeric chains were determined using the constant-strain energy minimization method. The obtained atomistic mechanical properties of the composite constituents were then scaled up using Mori-Tanaka micromechanical scheme. Monte Carlo simulations were conducted to determine the percolation and electrical conductivity of RVEs containing randomly dispersed CNTs. An advanced search algorithm was developed to identify percolating CNT networks and transform them into an equivalent electrical circuit formed from intrinsic and tunneling resistances. A solver based on the modified nodal analysis technique was then developed to calculate the effective conductivity of the RVE. Finally, the electrical model was coupled with a three-dimensional finite element model of the RVE to determine the coupled electromechanical behavior of the composite under tensile, compressive, and shear loads from the resistance-strain relationship. The outcome of the developed modeling approach revealed that: the elastic modulus of a nanocomposite reinforced with well-dispersed straight CNTs was found to increase almost linearly with the increase of their volume fraction and double at CNT volume fraction of 5.0 %; the combined effect of CNT waviness and agglomeration results in a significant reduction in the bulk properties of the nanocomposite; CNTs with grain boundaries perpendicular to the tube axis experience 60% reduction in its mechanical strength; and the nanocomposite gauge factor can reach up to 3.95 and is sensitive to loading direction and CNT concentration.

Fiber-Reinforced Nanocomposites: Fundamentals and Applications

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Publisher : Elsevier
ISBN 13 : 0128199105
Total Pages : 605 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Fiber-Reinforced Nanocomposites: Fundamentals and Applications by : Baoguo Han

Download or read book Fiber-Reinforced Nanocomposites: Fundamentals and Applications written by Baoguo Han and published by Elsevier. This book was released on 2020-03-13 with total page 605 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber-reinforced Nanocomposites: Fundamentals and Applications explores the fundamental concepts and emerging applications of fiber-reinforced nanocomposites in the automobile, aerospace, transportation, construction, sporting goods, optics, electronics, acoustics and environmental sector. In addition, the book provides a detailed overview of the properties of fiber-reinforced nanocomposites, including discussion on embedding these high-strength fibers in matrices. Due to the mismatch in structure, density, strain and thermal expansion coefficients between matrix and fibers, their thermo-mechanical properties strongly depend not only on the preparative methods, but also on the interaction between reinforcing phase and matrix phase. This book offers a concise overview of these advances and how they are leading to the creation of stronger, more durable classes of nanocomposite materials. Explores the interaction between fiber, nanoreinforcers and matrices at the nanoscale Shows how the properties of fiber-enforced nanocomposites are ideal for use for a variety of consumer products Outlines the major challenges to creating fiber-reinforced nanocomposites effectively

A Bridging Cell Multiscale Methodology to Model the Structural Behaviour of Polymer Matrix Composites

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (133 download)

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Book Synopsis A Bridging Cell Multiscale Methodology to Model the Structural Behaviour of Polymer Matrix Composites by : Vincent Iacobellis

Download or read book A Bridging Cell Multiscale Methodology to Model the Structural Behaviour of Polymer Matrix Composites written by Vincent Iacobellis and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite and nanocomposite materials exhibit behaviour which is inherently multiscale, extending from the atomistic to continuum levels. In composites, damage growth tends to occur at the nano and microstructural scale by means of crack growth and fibre-matrix debonding. Concurrent multiscale modeling provides a means of efficiently solving such localized phenomena, however its use in this application has been limited due to a number of existing issues in the multiscale field. These include the seamless transfer of information between continuum and atomistic domains, the small timesteps required for dynamic simulation, and limited research into concurrent multiscale modeling of amorphous polymeric materials. The objective of this thesis is thus twofold: to formulate a generalized approach to solving a coupled atomistic-to-continuum system that addresses these issues and to extend the application space of concurrent multiscale modeling to damage modeling in composite microstructures. To achieve these objectives, a finite element based multiscale technique termed the Bridging Cell Method (BCM), has been formulated with a focus on crystalline material systems. Case studies are then presented that show the effectiveness of the developed technique with respect to full atomistic simulations. The BCM is also demonstrated for applications of stress around a nanovoid, nanoindentation, and crack growth due to monotonic and cyclic loading. Next, the BCM is extended to modeling amorphous polymeric material systems where an adaptive solver and a two-step iterative solution algorithm are introduced. Finally, the amorphous and crystalline BCM is applied to modeling a polymer-graphite interface. This interface model is used to obtain cohesive zone parameters which are used in a cohesive zone model of fibre-matrix interfacial cracking in a composite microstructure. This allows for an investigation of the temperature dependent damage mechanics from the nano to microscale within polymer matrix composites due to transverse loading. Results from the simulations indicate that the BCM creates a seamless coupling between continuum and atomistic domains for crystalline material systems while substantially reducing force imbalance for amorphous material systems. Multiscale simulation results of the composite microstructure indicated that the model accurately predicted both quantitative (elastic modulus, strength, stress-strain response) and qualitative behaviour when compared to experimental results from the literature.

Cohesive Zone Model for Carbon Nanotube Adhesive Simulation and Fracture/fatigue Crack Growth

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ISBN 13 :
Total Pages : 129 pages
Book Rating : 4.:/5 (794 download)

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Book Synopsis Cohesive Zone Model for Carbon Nanotube Adhesive Simulation and Fracture/fatigue Crack Growth by : Haodan Jiang

Download or read book Cohesive Zone Model for Carbon Nanotube Adhesive Simulation and Fracture/fatigue Crack Growth written by Haodan Jiang and published by . This book was released on 2010 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Cohesive Zone Model (CZM) describes material separation with a traction-separation law and links the micro-structural failure mechanism to the continuum deformation field. The evolvement of the CZM and its specific features were introducted in the first chapter of this dissertation and followed by applications for interface decohesion and crack growth study. Chapter II adopted a bilinear CZM for description of the decohesion properties of the innovative carbon nanotube (CNT) dry adhesive. Macroscopic modeling of the uncoupled normal and shear adhesive behaviors were implemented using finite element method. The cohesive zone model completes a multi-scale modeling scheme together with coarse grained molecular dynamics (CGMD). Three-dimensional simulations of quasi-static fracture process were studied next by formulating an exponential cohesive law. Crack growth under monotonic loading was modeled and cohesive parameters were calibrated by comparing with experiments. The CZM simulation captured the crack initiation as well as the process of crack propagation. A damage-updated irreversible cohesive law was formulated in Chapter IV for simulations of cyclic crack growth. Material degradation was described with a damage evolution mechanism, revealing the history dependence of fatigue crack growth. The irreversible CZM was verified through one-element model under load-controlled and displacement-controlled fatigue loading and was further validated with fatigue crack growth simulations for different speciment modes. Simulation results captured the gradual damage accumulation and stable fatigue crack propagation, consistent with the power law method. Further application of the irreversible CZM for overload effect during fatigue crack propagation was presented in Chapter V. Stress redistribution caused by the overload in a compact-tension-shear (CTS) specimen was investigated. Fatigue crack growth retardation was studied in terms of overload ratios and the mode of the overload. A damage extrapolation scheme was formulated for the high-cycle fatigue loading and greatly reduced the computation cost. The last chapter investigated crack path deviation phenomena with possible CZM simulation approaches. Numerical issues and mesh-related convergence problem were referred for future investigation."--Abstract.

Carbon Nanotubes

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Publisher : CRC Press
ISBN 13 : 1000377504
Total Pages : 376 pages
Book Rating : 4.0/5 (3 download)

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Book Synopsis Carbon Nanotubes by : Andy Nieto

Download or read book Carbon Nanotubes written by Andy Nieto and published by CRC Press. This book was released on 2021-05-18 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This discovery of carbon nanotubes (CNT) three decades ago ushered in the technological era of nanotechnology. Among the most widely studied areas of CNT research is their use as structural reinforcements in composites. This book describes the development of CNT reinforced metal matrix composites (CNT-MMCs) over the last two decades. The field of CNT-MMCs is abundant in fundamental science, rich in engineering challenges and innovations and ripe for technological maturation and commercialization. The authors have sought to present the current state of the-art in CNT-MMC technology from their synthesis to their myriad potential end-use applications. Specifically, topics explored include: • Advantages, limitations, and evolution of processing techniques used to synthesize and fabricate CNT-MMCs • Emphasizes dispersion techniques of CNTs in metallic systems, a key challenge to the successful and widespread implementation of CNT-MMCs. Methods for quantification and improved control of CNT distributions are presented • Methods for quantification and improved control of CNT distributions are presented • Characterization techniques uniquely suited for charactering these nanoscale materials and their many chemical and physical interactions with the metal matrix, including real-time in-situ characterization of deformation mechanisms • Electron microscope images from premier studies enrich discussions on micro-mechanical modeling, interfacial design, mechanical behavior, and functional properties • A chapter is dedicated to the emergence of dual reinforcement composites that seek to enhance the efficacy of CNTs and lead to material properties by design This book highlights seminal findings in CNT-MMC research and includes several tables listing processing methods, associated CNT states, and resulting properties in order to aid the next generation of researchers in advancing the science and engineering of CNT-MMCs. In addition, a survey of the patent literature is presented in order to shed light on what the first wave of CNT-MMC commercialization may look like and the challenges that will have to be overcome, both technologically and commercially.

Multiscale Modeling of Carbon Nanotube-reinforced Cement-based Composites

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Publisher :
ISBN 13 :
Total Pages : 198 pages
Book Rating : 4.:/5 (12 download)

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Book Synopsis Multiscale Modeling of Carbon Nanotube-reinforced Cement-based Composites by : 王健菲

Download or read book Multiscale Modeling of Carbon Nanotube-reinforced Cement-based Composites written by 王健菲 and published by . This book was released on 2016 with total page 198 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

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.

Stochastic Multiscale Modeling of Polymeric Nanocomposites Using Data-driven Techniques

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (131 download)

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Book Synopsis Stochastic Multiscale Modeling of Polymeric Nanocomposites Using Data-driven Techniques by : Bokai Liu

Download or read book Stochastic Multiscale Modeling of Polymeric Nanocomposites Using Data-driven Techniques written by Bokai Liu and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: N recent years, lightweight materials, such as polymer composite materials (PNCs) have been studied and developed due to their excellent physical and chemical properties. Structures composed of these composite materials are widely used in aerospace engineering structures, automotive components, and electrical devices. The excellent and outstanding mechanical, thermal, and electrical properties of Carbon nanotube (CNT) make it an ideal filler to strengthen polymer materials' comparable properties. The heat transfer of composite materials has very promising engineering applications in many fields, especially in electronic devices and energy storage equipment. It is essential in high-energy density systems since electronic components need heat dissipation functionality. Or in other words, in electronic devices the generated heat should ideally be dissipated by light and small heat sinks. Polymeric composites consist of fillers embedded in a polymer matrix, the first ones will significantly affect the overall (macroscopic) performance of the material. There are many common carbon-based fillers such as single-walled carbon nanotubes (SWCNT), multi-walled carbon nanotubes (MWCNT), carbon nanobuds (CNB), fullerene, and graphene. Additives inside the matrix have become a popular subject for researchers. Some extraordinary characters, such as high-performance load, lightweight design, excellent chemical resistance, easy processing, and heat transfer, make the design of polymeric nanotube composites (PNCs) flexible. Due to the reinforcing effects with different fillers on composite materials, it has a higher degree of freedom and can be designed for the structure according to specific applications' needs. As already stated, our research focus will be on SWCNT enhanced PNCs. Since experiments are timeconsuming, sometimes expensive and cannot shed light into phenomena taking place for instance at the interfaces/interphases of composites, they are often complemented through theoretical and computational analysis. While most studies are based on deterministic approaches, there is a comparatively lower number of stochastic methods accounting for uncertainties in the input parameters. In deterministic models, the output of the model is fully determined by the parameter values and the initial conditions. However, uncertainties in the input parameters such as aspect ratio, volume fraction, thermal properties of fiber and matrix need to be taken into account for reliable predictions. In this research, a stochastic multiscale method is provided to study the influence of numerous uncertain input parameters on the thermal conductivity of the composite. Therefore, a hierarchical multi-scale method based on computational homogenization is presented in to predict the macroscopic thermal conductivity based on the fine-scale structure. In order to study the inner mechanism, we use the finite element method and employ surrogate models to conduct a Global Sensitivity Analysis (GSA). The SA is performed in order to quantify the influence of the conductivity of the fiber, matrix, Kapitza resistance, volume fraction and aspect ratio on the macroscopic conductivity. Therefore, we compute first-order and total-effect sensitivity indices with different surrogate models. As stochastic multiscale models are computational expensive, surrogate approaches are commonly exploited. With the emergence of high performance computing and artificial intelligence, machine learning has become a popular modeling tool for numerous applications. Machine learning (ML) is commonly used in regression and maps data through specific rules with algorithms to build input and output models. They are particularly useful for nonlinear input-output relationships when sufficient data is available. ML has also been used in the design of new materials and multiscale analysis. For instance, Artificial neural networks and integrated learning seem to be ideally for such a task. They can theoretically simulate any non-linear relationship through the connection of neurons. Mapping relationships are employed to carry out data-driven simulations of inputs and outputs in stochastic modeling. This research aims to develop a stochastic multi-scale computational models of PNCs in heat transfer. ...

Handbook of Micromechanics and Nanomechanics

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Author :
Publisher : CRC Press
ISBN 13 : 9814411248
Total Pages : 1256 pages
Book Rating : 4.8/5 (144 download)

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Book Synopsis Handbook of Micromechanics and Nanomechanics by : Shaofan Li

Download or read book Handbook of Micromechanics and Nanomechanics written by Shaofan Li and published by CRC Press. This book was released on 2016-04-19 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest developments and applications of micromechanics and nanomechanics. It particularly focuses on some recent applications and impact areas of micromechanics and nanomechanics that have not been discussed in traditional micromechanics and nanomechanics books on metamaterials, micromechanics of ferroelectric/piezoelectric,

Fullerenes: Advances in Research and Application: 2011 Edition

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Publisher : ScholarlyEditions
ISBN 13 : 1464921105
Total Pages : 959 pages
Book Rating : 4.4/5 (649 download)

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Book Synopsis Fullerenes: Advances in Research and Application: 2011 Edition by :

Download or read book Fullerenes: Advances in Research and Application: 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 959 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fullerenes: Advances in Research and Application: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Fullerenes. The editors have built Fullerenes: Advances in Research and Application: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Fullerenes in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Fullerenes: Advances in Research and Application: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Proceedings of 1st International Conference on Structural Damage Modelling and Assessment

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Publisher : Springer Nature
ISBN 13 : 9811591210
Total Pages : 496 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis Proceedings of 1st International Conference on Structural Damage Modelling and Assessment by : Magd Abdel Wahab

Download or read book Proceedings of 1st International Conference on Structural Damage Modelling and Assessment written by Magd Abdel Wahab and published by Springer Nature. This book was released on 2020-12-12 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises the select proceedings of Structural Damage Modelling and Assessment (SDMA 2020) presented online on 4–5 August 2020. It discusses the recent advances in fields related to damage modelling, damage detection and assessment, non-destructive testing and evaluation, structure integrity and structural health monitoring. The conference covers all research topics and applications relevant to structural damage modelling and assessment using theoretical, numerical and experimental techniques. This book is useful to scientists and engineers in academia and industry who are interested in the field of structural damage and integrity.