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Author : Niaz Abdolrahim
Publisher :
Page : pages
File Size : 45,26 MB
Release : 2013
Category :
ISBN : 9781303240348
The objective of this research is to investigate the deformation behaviors of two types of NMMs at lower length scales: 1) One dimensional Cu-Ni, Au-Ni nanowires with coherent interfaces and 2) Two dimensional Cu-Nb multilayers with incoherent interfaces.
Author : Christopher R. Weinberger
Publisher : Springer
Page : 554 pages
File Size : 50,66 MB
Release : 2016-08-30
Category : Technology & Engineering
ISBN : 3319334808
This book presents a unique combination of chapters that together provide a practical introduction to multiscale modeling applied to nanoscale materials mechanics. The goal of this book is to present a balanced treatment of both the theory of the methodology, as well as some practical aspects of conducting the simulations and models. The first half of the book covers some fundamental modeling and simulation techniques ranging from ab-inito methods to the continuum scale. Included in this set of methods are several different concurrent multiscale methods for bridging time and length scales applicable to mechanics at the nanoscale regime. The second half of the book presents a range of case studies from a varied selection of research groups focusing either on a the application of multiscale modeling to a specific nanomaterial, or novel analysis techniques aimed at exploring nanomechanics. Readers are also directed to helpful sites and other resources throughout the book where the simulation codes and methodologies discussed herein can be accessed. Emphasis on the practicality of the detailed techniques is especially felt in the latter half of the book, which is dedicated to specific examples to study nanomechanics and multiscale materials behavior. An instructive avenue for learning how to effectively apply these simulation tools to solve nanomechanics problems is to study previous endeavors. Therefore, each chapter is written by a unique team of experts who have used multiscale materials modeling to solve a practical nanomechanics problem. These chapters provide an extensive picture of the multiscale materials landscape from problem statement through the final results and outlook, providing readers with a roadmap for incorporating these techniques into their own research.
Author : Jinghong Fan
Publisher : John Wiley & Sons
Page : 510 pages
File Size : 29,14 MB
Release : 2011-06-28
Category : Technology & Engineering
ISBN : 111995648X
Presenting cutting-edge research and development within multiscale modeling techniques and frameworks, Multiscale Analysis of Deformation and Failure of Materials systematically describes the background, principles and methods within this exciting new & interdisciplinary field. The author’s approach emphasizes the principles and methods of atomistic simulation and its transition to the nano and sub-micron scale of a continuum, which is technically important for nanotechnology and biotechnology. He also pays close attention to multiscale analysis across the micro/meso/macroscopy of a continuum, which has a broad scope of applications encompassing different disciplines and practices, and is an essential extension of mesomechanics. Of equal interest to engineers, scientists, academics and students, Multiscale Analysis of Deformation and Failure of Materials is a multidisciplinary text relevant to those working in the areas of materials science, solid and computational mechanics, bioengineering and biomaterials, and aerospace, automotive, civil, and environmental engineering. Provides a deep understanding of multiscale analysis and its implementation Shows in detail how multiscale models can be developed from practical problems and how to use the multiscale methods and software to carry out simulations Discusses two interlinked categories of multiscale analysis; analysis spanning from the atomistic to the micro-continuum scales, and analysis across the micro/meso/macro scale of continuum.
Author : Firas Akasheh
Publisher :
Page : 150 pages
File Size : 33,94 MB
Release : 2007
Category :
ISBN : 9780549023258
In this work, size effects and deformation mechanisms in nanoscale metallic multilayered (NMM) composites were studied. Existing models for the prediction of the dependence of strength of NMM composites on the individual layer thickness do not capture the experimentally observed dependence. Dislocation interactions have been suggested as a significant contributor to this discrepancy. Due to the complexity and multiplicity of dislocation interaction in real systems, the study started by examining the hardening effect and implications on the dislocation structure of two known-to-be significant dislocation interactions in NMM composites. The first is the interaction between a threading dislocation and orthogonally intersection interfacial dislocations. Dislocation dynamics (DD) analysis was employed and it was found that the strongest interaction occurs when the interacting dislocations are collinear and involves annihilation reactions and the formation of 90° dislocation bends at the interfaces, as commonly observed in experiments. The strength predictions indicate a strengthen increase of about 50%; however, they do not follow the experimentally observed trend. The second interaction to study was that between a threading dislocation and parallel interfacial dislocations. A semi-analytical energetic approach was employed and it was found that parallel interactions can lead to softening effect, as well as hardening effect depending on the relative sign of the Burgers vector of the threading and the parallel dislocations. It was also found that when the Burgers vectors are collinear, the interaction is stronger. A comparison with the measured strength of real multilayered system shows that accounting for parallel interactions improves the strength predictions for an isolated glide dislocation, however that does not offer answers regarding the observed strength saturation when the individual layer thickness in the few nanometer range. Finally, large-scale DD simulations of NMM composites were performed. Such simulations naturally accounts for all the possible and complex interactions in a real system. The strength predictions of such simulations are in better qualitative agreement with experimental trends than any of the unit process. Nevertheless, more work is needed to validate the results by investigating different relaxation models to accomplish the initial dislocations structure used in subsequent loading. The simulations were also valuable in identifying dislocation mechanisms which can take place during the deformation.
Author : Shuai Shao
Publisher :
Page : pages
File Size : 17,67 MB
Release : 2012
Category :
ISBN : 9781267477316
The goal of this thesis is to understand the interaction between dislocations and various metallic interfaces in nanoscale metallic multilayers (NMM). At lower strain rates, this mean understanding the effect of interfaces to the strain hardening of the NMMs; at higher strain rates, this means the effect of the interfaces on the spallation strengths of the NMMs. NMMs possess ultra-high strength level which is owing to the interactions between single dislocations (i.e. no pile-up) and interfaces. In this thesis, aiming at the goal, using atomistic simulations several nanoscale metallic multilayers subjected to different loading conditions and strain rates are being considered.
Author : Vasyl Michael Harik
Publisher : Springer Science & Business Media
Page : 241 pages
File Size : 48,40 MB
Release : 2013-03-09
Category : Technology & Engineering
ISBN : 940170385X
An outstanding feature of this book is a collection of state-of-the-art reviews written by leading researchers in the nanomechanics of carbon nanotubes, nanocrystalline materials, biomechanics and polymer nanocomposites. The structure and properties of carbon nanotubes, polycrystalline metals, and coatings are discussed in great details. The book is an exceptional resource on multi-scale modelling of metals, nanocomposites, MEMS materials and biomedical applications. An extensive bibliography concerning all these topics is included. Highlights on bio-materials, MEMS, and the latest multi-scale methods (e.g., molecular dynamics and Monte Carlo) are presented. Numerous illustrations of inter-atomic potentials, nanotube deformation and fracture, grain rotation and growth in solids, ceramic coating structures, blood flows and cell adhesion are discussed. This book provides a comprehensive review of latest developments in the analysis of mechanical phenomena in nanotechnology and bio-nanotechnology.
Author : Young Kwon
Publisher : Springer Science & Business Media
Page : 634 pages
File Size : 22,56 MB
Release : 2007-12-04
Category : Technology & Engineering
ISBN : 0387363181
This book presents the state-of-the-art in multiscale modeling and simulation techniques for composite materials and structures. It focuses on the structural and functional properties of engineering composites and the sustainable high performance of components and structures. The multiscale techniques can be also applied to nanocomposites which are important application areas in nanotechnology. There are few books available on this topic.
Author : Bharat Bhushan
Publisher : Springer Science & Business Media
Page : 1467 pages
File Size : 47,2 MB
Release : 2014-03-13
Category : Technology & Engineering
ISBN : 3642311075
Nanomaterials attract tremendous attention in recent researches. Although extensive research has been done in this field it still lacks a comprehensive reference work that presents data on properties of different Nanomaterials. This Handbook of Nanomaterials Properties will be the first single reference work that brings together the various properties with wide breadth and scope.
Author : Hussein M. Zbib
Publisher : Cambridge University Press
Page : 314 pages
File Size : 49,61 MB
Release : 2014-06-05
Category : Technology & Engineering
ISBN : 9781107409378
In recent years there has been increasing interest in using what are termed 'multiscale modeling' approaches to understand the effects of composition and microstructure on mechanical behavior of materials. It is of utmost importance that these modeling efforts and simulations at the various length scales be coupled with experimental work. This 2003 volume focuses on experimentally validated multiscale modeling of ductile metals and alloys. The areas of atomistic, mesoscopic and continuum modeling are featured. Topics include: multiscale modeling of plastic deformation; dislocation phenomena at the atomistic-length scale; multiscale modeling of thin films and nanoindentation; multiscale modeling of dislocation phenomena and plastic deformation; multiscale modeling of microstructures and experiments; and models and experiments in nanostructured materials.
Author : Alexander V. Vakhrushev
Publisher :
Page : 0 pages
File Size : 46,34 MB
Release : 2017
Category : Multiscale modeling
ISBN : 9781771885287
"5. Numerical Simulation Of Nanosystem Properties "--"Bibliography "--"Epilogue