Eccomas Multidisciplinary Jubilee Symposium
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Eccomas Multidisciplinary Jubilee Symposium
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Author : Josef Eberhardsteiner
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-12-16
Eccomas Multidisciplinary Jubilee Symposium written by Josef Eberhardsteiner and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-12-16 with Technology & Engineering categories.
This book contains 23 papers presented at the ECCOMAS Multidisciplinary Jubilee Symposium - New Computational Challenges in Materials, Structures, and Fluids (EMJS08), in Vienna, February 18–20, 2008. The main intention of EMJS08 was to react adequately to the increasing need for interdisciplinary research activities allowing ef?cient solution of complex problems in engineering and in the applied sciences. The 15th anniversary of ECCOMAS (European Community on Computational Methods in Applied Sciences) provided a suitable frame for taking the afo- mentioned situation into account by inviting distinguished colleagues from d- ferent areas of engineering and the applied sciences, encouraging them to choose multidisciplinary topics for their lectures. The main themes of EMJS08 have a long tradition in engineering and in the applied sciences: materials, structures, and ?uids. The solution of scienti?c pr- lems involving ?uids together with solids and structures, not to forget the materials the structures are made of, is of paramount importance in a technical world of rapidly increasing sophistication, referred to as the Leonardo World by the eminent German philosopher Ju ̈rgen Mittelstraß. More recently, the main themes of EMJS08 have gained considerable mom- tum, owing to signi?cant progress in nanotechnology. It enables resolution of a multitude of materials into their micro- and nanostructures. Covering aspects such as • Physical and chemical characterization • Multiscale modeling concepts, continuum micromechanics, and computational homogenization, as well as • Applications in various engineering ?elds the individual contributions to this book ?ow along different tracks of ?uids, materials, and structures.
Geomechanics From Micro To Macro
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Author : Kenichi Soga
language : en
Publisher: CRC Press
Release Date : 2014-08-26
Geomechanics From Micro To Macro written by Kenichi Soga and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-08-26 with Technology & Engineering categories.
Geomechanics from Micro to Macro contains 268 papers presented at the International Symposium on Geomechanics from Micro and Macro (IS-Cambridge, UK, 1-3 September 2014). The symposium created a forum for the dissemination of new advances in the micro-macro relations of geomaterial behaviour and its modelling. The papers on experimental investigati
See Through
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Author : Jochen Jankowai
language : en
Publisher: Linköping University Electronic Press
Release Date : 2024-12-13
See Through written by Jochen Jankowai and has been published by Linköping University Electronic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-12-13 with categories.
The problem of visualising multivariate data and tensor fields inherits its complexity from the data it targets. By definition, complex data is "hard to separate, analyse, or solve"1. This becomes evident through the fact that methods for "simple" data such as scalars and vectors do not trivially extend to multivariate data and tensors. In the light of increasing number of output variables from simulation models and measurements, this lack of methods leads to a limited choice in the analysis and to a lower fidelity of the analysis. In addition, split application of established methods to a subset of the data, for example the separate rendering of isosurfaces for the different scalar fields contained in multivariate data, brings about a number of challenges and pitfalls. In this work I present several approaches to extending existing methods for scalar field visualisation and analysis to multivariate data and, in some cases by extension, tensor fields. Specifically, I have investigated the extraction of isosurfaces from multivariate data, the topological analysis of multivariate data and tensor fields, and the design of transfer functions for tensor fields. Isosurfaces (contours) are a widely used visualisation modality. They can be used to intuitively highlight regions of interest and are the goto choice for taking snapshots during large-scale in-situ simulations to verify results. In domains such as meteorology where simulations yield a number of output variables for pressure, temperature, precipitation, etc., methods for visualising multivariate isosurfaces are needed. Feature level sets offer such a method by interpreting an isosurface as the result of an intersection of the isovalue with the data in the domain. From this, we expand the notion of isovalues, in this context called traits, and isosurfaces to arbitrary dimensionality. An intermediate product of the calculation of feature level sets is the distance field defining every data point’s distance towards the trait. Given this distance field, we compute the merge tree for it and thereby enable topological analysis of multivariate data. The choice of merge trees comes naturally as minima in the distance field correspond to regions closest to the trait. The concept of derived fields as input is also used in our approach to topological analysis of tensor fields. Special attention needs to be paid to the non-linear behaviour of derived vector and scalar fields. We use the field of eigenvectors derived from the tensor field to determine cells containing degenerate points in tensor fields and insert zero-valued points in the corresponding anisotropy field. This process yields a scalar field which can subsequently be used as input for further topological analysis.Another challenge when it comes to the visualisation of tensor fields is the design of transfer functions in the context of volume rendering. This is because of the high dimensional entity that is a tensor and its non-linear derivatives. We span a shape space which is populated by representatives which visually encode the tensor. This allows the user to steer the rendering by selecting the desired "shape" of the tensor rather than adjusting a slider for a derived scalar value. 1 Merriam-Webster. Complex. In Merriam-Webster dictionary (Merriam-Webster.com). Retrieved December 1st, 2024, from https://www.merriam-webster.com/dictionary/complex Problemet med att visualisera multivariat data och tensorfält beror på komplexiteten hos själva datan. Enligt definitionen består komplexa data av "många delar som hänger samman på ett svåröverskådligt sätt"2. Detta blir uppenbart genom det faktum att metoder för 'enkla' data, såsom skalärer och vektorer, inte på ett trivialt sätt går att utvidga till multivariat data och tensorer. På grund av det ökande antalet outputvariabler från simuleringsmodeller och mätningar leder denna brist till ett begränsat val av metoder i analysen och till en lägre analystrohet. Dessutom medför en uppdelad tillämpning av etablerade metoder på en delmängd av data, till exempel separat rendering av isoytor för de olika skalära fälten som ingår i multivariat data, ett antal utmaningar och fallgropar. I detta arbete presenterar jag flera tillvägagångssätt för att utvidga befintliga metoder för skalärfältsvisualisering och analys till multivariat data och, i vissa fall, i förlängningen, tensorfält. Specifikt har jag undersökt extraktion av isoytor från multivariat data, den topologiska analysen av multivariat data och tensorfält samt designen av överföringsfunktioner för tensorfält. Isoytor (konturer) är en välkänd visualiseringsteknik. De kan användas för att intuitivt lyfta fram områden av intresse och är det naturliga valet för att ta ögonblicksbilder under storskaliga simuleringar på plats för att verifiera resultat. Inom områden som meteorologi där simuleringar ger ett antal utdatavariabler för tryck, temperatur, nederbörd etc. behövs metoder för att visualisera multivariata isoytor. Feature level sets erbjuder en sådan metod genom att tolka en isoyta som resultatet av en skärning av isovärdet med data i domänen. Genom detta utökar vi begreppet isovärden, i detta sammanhang kallade traits, och isoytor till godtycklig dimensionalitet. En mellanprodukt av beräkningen av feature level sets är avståndsfältet som definierar varje datapunkts avstånd till trait:en. Med tanke på detta avståndsfält beräknar vi merge trees för det och möjliggör därigenom topologisk analys av multivariata data. Valet av merge trees kommer naturligt då minima i avståndsfältet motsvarar regioner närmast trait:en. Konceptet med beräknade fält som input används också i vårt förhållningssätt till topologisk analys av tensorfält. Det icke-linjära beteendet hos härledda/uträknade vektor- och skalära fält bör här ägnas särskild uppmärksamhet. Vi använder fältet av egenvektorer som härleds från tensorfältet för att bestämma celler som innehåller degenererade punkter i tensorfält och infogar nollvärdespunkter i motsvarande anisotropifält. Denna process ger ett skalärt fält som sedan kan användas som input för ytterligare topologisk analys. En annan utmaning när det kommer till visualisering av tensorfält är utformningen av överföringsfunktioner i samband med volymrendering. Detta beror på den högdimensionella enheten som är en tensor och dess icke-linjära derivator. Vi erbjuder ett bredd designutrymme för att visuellt koda tensorn. Detta gör att användaren kan styra renderingen genom att välja önskad "form" av tensorn istället för att justera en skjutreglage för ett härlett skalärt värde. 2 Svensk ordbok. Komplex. I Svenska Akademiens ordbok (svenska.se). Hämtad den 1:a december 2024 från https://svenska.se/so/?id=140703_ 1&pz=3
Computer Methods In Mechanics
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Author : Mieczyslaw Kuczma
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-03-10
Computer Methods In Mechanics written by Mieczyslaw Kuczma and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-03-10 with Technology & Engineering categories.
Prominent scientists present the latest achievements in computational methods and mechanics in this book. These lectures were held at the CMM 2009 conference.
Multiscale Modelling And Optimisation Of Materials And Structures
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Author : Tadeusz Burczynski
language : en
Publisher: John Wiley & Sons
Release Date : 2022-05-19
Multiscale Modelling And Optimisation Of Materials And Structures written by Tadeusz Burczynski and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-19 with Technology & Engineering categories.
Addresses the very topical, crucial and original subject of parameter identification and optimization within multiscale modeling methods Multiscale Modelling and Optimization of Materials and Structures presents an important and challenging area of research that enables the design of new materials and structures with better quality, strength and performance parameters as well as the creation of reliable models that take into account structural, material and topological properties at different scales. The authors’ approach is four-fold; 1) the basic principles of micro and nano scale modeling techniques; 2) the connection of micro and/or nano scale models with macro simulation software; 3) optimization development in the framework of multiscale engineering and the solution of identification problems; 4) the computer science techniques used in this model and advice for scientists interested in developing their own models and software for multiscale analysis and optimization. The authors present several approaches such as the bridging and homogenization methods, as well as the general formulation of complex optimization and identification problems in multiscale modelling. They apply global optimization algorithms based on robust bioinspired algorithms, proposing parallel and multi-subpopulation approaches in order to speed-up computations, and discuss several numerical examples of multiscale modeling, optimization and identification of composite and functionally graded engineering materials and bone tissues. Multiscale Modelling and Optimization of Materials and Structures is thereby a valuable source of information for young scientists and students looking to develop their own models, write their own computer programs and implement them into simulation systems. Describes micro and nano scale models developed by the authors along with case studies of analysis and optimization Discusses the problems of computing costs, efficiency of information transfer, effective use of the computer memory and several other aspects of development of multiscale models Includes real physical, chemical and experimental studies with modern experimental techniques Provides a valuable source of information for young scientists and students looking to develop their own models, write their own computer programs, and implement them into simulation systems.
Advances In Direct Methods For Materials And Structures
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Author : Olga Barrera
language : en
Publisher: Springer
Release Date : 2017-08-22
Advances In Direct Methods For Materials And Structures written by Olga Barrera and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-22 with Technology & Engineering categories.
This book offers a state-of-the-art overview and includes recent developments of various direct computational analysis methods. It is based on recently developed and widely employed numerical procedures for limit and shakedown analysis of structures and their extensions to a wide range of physical problems relevant to the design of materials and structural components. The book can be used as a complementary text for advanced academic courses on computational mechanics, structural mechanics, soil mechanics and computational plasticity and it can be used a research text.
Extended Finite Element Method For Crack Propagation
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Author : Sylvie Pommier
language : en
Publisher: John Wiley & Sons
Release Date : 2013-03-04
Extended Finite Element Method For Crack Propagation written by Sylvie Pommier and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-04 with Technology & Engineering categories.
Novel techniques for modeling 3D cracks and their evolution in solids are presented. Cracks are modeled in terms of signed distance functions (level sets). Stress, strain and displacement field are determined using the extended finite elements method (X-FEM). Non-linear constitutive behavior for the crack tip region are developed within this framework to account for non-linear effect in crack propagation. Applications for static or dynamics case are provided.
The British National Bibliography
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Author : Arthur James Wells
language : en
Publisher:
Release Date : 2009
The British National Bibliography written by Arthur James Wells and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Bibliography, National categories.
Emjs 2008
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Author :
language : en
Publisher:
Release Date : 2008
Emjs 2008 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Deutsche Nationalbibliographie Und Bibliographie Der Im Ausland Erschienenen Deutschsprachigen Ver Ffentlichungen
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Author :
language : de
Publisher:
Release Date : 2009
Deutsche Nationalbibliographie Und Bibliographie Der Im Ausland Erschienenen Deutschsprachigen Ver Ffentlichungen written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with German literature categories.