Micro Mechanical Modelling Of Heterogeneous Materials Containing Microcracks With Discrete Element Method Dem

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Micro-mechanical modelling of heterogeneous materials containing microcracks with Discrete Element Method (DEM)

Author : Farid Asadi
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (128 download)

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Book Synopsis Micro-mechanical modelling of heterogeneous materials containing microcracks with Discrete Element Method (DEM) by : Farid Asadi

Download or read book Micro-mechanical modelling of heterogeneous materials containing microcracks with Discrete Element Method (DEM) written by Farid Asadi and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse s'inscrit dans le cadre du projet Européen ATHOR (Advanced THermomechanical Multiscale Modelling of Refractory Linings). Les matériaux réfractaires sont des céramiques hétérogènes, résistantes à des températures élevées pour lesquelles, dans de nombreux cas, des microfissures préexistantes au sein de la microstructure jouent un rôle clé dans la résistance aux chocs thermiques. La Méthode des Eléments Discrets (MED) est aujourd'hui considérée comme un outil numérique majeur qui peut contribuer, à l'avenir, à concevoir des microstructures plus performantes. Ainsi, cette thèse est dédiée à la simulation numérique de matériaux réfractaires intégrant leur microstructure, leurs hétérogénéités, ainsi que la présence de fissures, et leur influence sur le comportement mécanique macroscopique. Ces travaux ont par ailleurs été réalisés dans le cadre d'un partenariat avec la société "ITASCA consultants". Au sein de l'outil Particle Flow Code (PFC), utilisé comme plateforme numérique MED, le model de contact Flat Joint Model (FJM) a été choisi car celui-ci permet de modéliser des microstructures de grains imbriqués, analogues à celles des matériaux réfractaires. Afin de développer des modèles numériques permettant de décrire les relations entre la microstructure et le comportement thermomécanique macroscopique, il est essentiel de mettre en oeuvre une approche multi-échelles, micro à macro, précise pour chacune des propriétés physiques clés intervenant dans la tenue aux chocs thermiques, en commençant par les propriétés d'élasticité. Dans cet objectif, la MED n'étant pas, à ce stade, aussi robuste que la Méthode des Eléments Finis (MEF), une approche d'homogénéisation périodique est proposée pour des milieux continus. Cette approche a ici été validée en comparant les résultats obtenus à des matériaux modèles, des modèles analytiques et MEF. A l'échelle méso-scopique, un modèle MED utilisant une approche statistique pour imiter l'influence mécanique des microfissures préexistantes est mis en oeuvre. Cette approche a également été validée par des données mécaniques expérimentales. Par la suite, afin de vérifier l'applicabilité du modèle MED proposé, des simulations de Wedge Splitting Test (WST) sont proposées pour étudier le processus de fissuration et le comparer qualitativement aux résultats expérimentaux obtenus en DIC. Finalement, un modèle hybride discret/continu (MED/MVF) est proposé pour optimiser ces simulations de WST et réduire les temps de calculs. Ces résultats clés ouvrent de nouvelles voies très intéressantes d'utilisation de la MED pour prédire le comportement thermomécanique de matériaux hétérogènes contenant de nombreuses microfissures pouvant se propager simultanément.

Heterogeneous Media

Author : Konstantin Markov
Publisher : Springer Science & Business Media
ISBN 13 : 1461213320
Total Pages : 489 pages
Book Rating : 4.4/5 (612 download)

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Book Synopsis Heterogeneous Media by : Konstantin Markov

Download or read book Heterogeneous Media written by Konstantin Markov and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most materials used in contemporary life and industry are heterogeneous (composites) and multicomponent, possessing a rich and complex internal structure. This internal structure, or microstructure, plays a key role in understanding and controlling the continuum behavior, or macroscopic, of a wide variety of materials. The modeling process is a critical tool for scientists and engineers studying the analysis and experimentation for the micromechanics and behavior of these materials. "Heterogeneous Media" is a critical, in-depth edited survey of the major topics surrounding the modeling and analysis of problems in micromechanics of multicomponent systems, including conceptual and practical aspects. The goal of this extensive and comprehensive survey is to provide both specialists and nonspecialists with an authoritative and interdisciplinary perspective of current ideas and methods used for modeling heterogeneous materials behavior and their applications. Topics and Features: * all chapters use interdisciplinary modeling perspective for investigating heterogeneous media*Five chapters provide self-contained discussions, with background provided*Focuses only upon most important techniques and models, fully exploring micro-macro interconnections*extensive introductory survey chapter on micromechanics of heterogeneous media*microstructure characterization via statistical correlation functions*micro-scale deformation of pore space*wave fields and effective dynamical properties*modeling of the complex production technologies for composite materials The book is ideal for a general scientific and engineering audience needing an in-depth view and guide to current ideas, methods and

Micromechanics

Author : S. Nemat-Nasser
Publisher : Elsevier
ISBN 13 : 1483291510
Total Pages : 708 pages
Book Rating : 4.4/5 (832 download)

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Book Synopsis Micromechanics by : S. Nemat-Nasser

Download or read book Micromechanics written by S. Nemat-Nasser and published by Elsevier. This book was released on 2013-10-22 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview is given in this book towards a fundamental understanding of the micromechanics of the overall response and failure modes of advanced materials, such as ceramics and ceramic and other composites. These advanced materials have become the focus of systematic and extensive research in recent times. The book consists of two parts. The first part reviews solids with microdefects such as cavities, cracks, and inclusions, as well as elastic composites. To render the book self-contained, the second part focuses on the fundamentals of continuum mechanics, particularly linear elasticity which forms the basis for the development of small deformation micromechanics. In Part 1, a fundamental and general framework for quantitative, rigorous analysis of the overall response and failure modes of microstructurally heterogeneous solids is systematically developed. These expressions apply to broad classes of materials with inhomogeneities and defects. While for the most part, the general framework is set within linear elasticity, the results directly translate to heterogeneous solids with rate-dependent or rate-independent inelastic constituents. This application is specifically referred to in various chapters. The general exact correlations obtained between the overall properties and the microstructure are then used together with simple models, to develop techniques for direct quantitative evaluation of the overall response which is generally described in terms of instantaneous overall moduli or compliance. The correlations among the corresponding results for a variety of problems are examined in great detail. The bounds as well as the specific results, include new observations and original developments, as well as an in-depth account of the state of the art. Part 2 focuses on Elasticity. The section on variational methods includes some new elements which should prove useful for application to advanced modeling, as well as solutions of composites and related heterogeneous bodies. A brief modern version of elements in vector and tensor algebra is provided which is particularly tailored to provide a background for the rest of this book. The data contained in this volume as Part 1 includes new results on many basic issues in micromechanics, which will be helpful to graduate students and researchers involved with rigorous physically-based modeling of overall properties of heterogeneous solids.

The Combined Finite-Discrete Element Method

Author : Antonio A. Munjiza
Publisher : John Wiley & Sons
ISBN 13 : 0470020172
Total Pages : 348 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis The Combined Finite-Discrete Element Method by : Antonio A. Munjiza

Download or read book The Combined Finite-Discrete Element Method written by Antonio A. Munjiza and published by John Wiley & Sons. This book was released on 2004-04-21 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The combined finite discrete element method is a relatively new computational tool aimed at problems involving static and / or dynamic behaviour of systems involving a large number of solid deformable bodies. Such problems include fragmentation using explosives (e.g rock blasting), impacts, demolition (collapsing buildings), blast loads, digging and loading processes, and powder technology. The combined finite-discrete element method - a natural extension of both discrete and finite element methods - allows researchers to model problems involving the deformability of either one solid body, a large number of bodies, or a solid body which fragments (e.g. in rock blasting applications a more or less intact rock mass is transformed into a pile of solid rock fragments of different sizes, which interact with each other). The topic is gaining in importance, and is at the forefront of some of the current efforts in computational modeling of the failure of solids. * Accompanying source codes plus input and output files available on the Internet * Important applications such as mining engineering, rock blasting and petroleum engineering * Includes practical examples of applications areas Essential reading for postgraduates, researchers and software engineers working in mechanical engineering.

Multiscale Modeling of Heterogeneous Structures

Author : Jurica Sorić
Publisher : Springer
ISBN 13 : 3319654632
Total Pages : 374 pages
Book Rating : 4.3/5 (196 download)

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Book Synopsis Multiscale Modeling of Heterogeneous Structures by : Jurica Sorić

Download or read book Multiscale Modeling of Heterogeneous Structures written by Jurica Sorić and published by Springer. This book was released on 2017-11-30 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of multiscale approaches and homogenization procedures as well as damage evaluation and crack initiation, and addresses recent advances in the analysis and discretization of heterogeneous materials. It also highlights the state of the art in this research area with respect to different computational methods, software development and applications to engineering structures. The first part focuses on defects in composite materials including their numerical and experimental investigations; elastic as well as elastoplastic constitutive models are considered, where the modeling has been performed at macro- and micro levels. The second part is devoted to novel computational schemes applied on different scales and discusses the validation of numerical results. The third part discusses gradient enhanced modeling, in particular quasi-brittle and ductile damage, using the gradient enhanced approach. The final part addresses thermoplasticity, solid-liquid mixtures and ferroelectric models. The contents are based on the international workshop “Multiscale Modeling of Heterogeneous Structures” (MUMO 2016), held in Dubrovnik, Croatia in September 2016.

Micromechanics and Nanosimulation of Metals and Composites

Author : Siegfried Schmauder
Publisher : Springer Science & Business Media
ISBN 13 : 3540786783
Total Pages : 432 pages
Book Rating : 4.5/5 (47 download)

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Book Synopsis Micromechanics and Nanosimulation of Metals and Composites by : Siegfried Schmauder

Download or read book Micromechanics and Nanosimulation of Metals and Composites written by Siegfried Schmauder and published by Springer Science & Business Media. This book was released on 2008-10-20 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: The strength of metallic materials determines the usability and reliability of all the machines, tools and equipment around us. Yet, the question about which mechanisms control the strength and damage resistance of materials and how they can be optimised remains largely unanswered. How do real, heterogeneous ma- rials deform and fail? Why can a small modification of the microstructure increase the strength and damage resistance of materials manifold? How can the strength of heterogeneous materials be predicted? The purpose of this book is to present different experimental and computational analysis methods of micromechanics of damage and strength of materials and to demonstrate their applications to various micromechanical problems. This book summarizes at a glance some of the publications of the Computational Mechanics Group at the IMWF/MPA Stuttgart, dealing with atomistic, micro- and meso- chanical modelling and experimental analysis of strength and damage of metallic materials. In chapter 1, the micromechanisms of damage and fracture in different groups of materials are investigated experimentally, using direct observations and inverse analysis. The interaction of microstructural elements with the evolving damage is studied in these experiments. Chapter 2 presents different approaches to the - cromechanical simulation of composite materials: embedded unit cells, multiphase finite elements and multiparticle unit cells. Examples of the application of these models to the analysis of deformation and damage in different materials are given. Chapter 3 deals with the methods of numerical modelling of damage evolution and crack growth in heterogeneous materials.

Multiscale Modeling of Complex Materials

Author : Tomasz Sadowski
Publisher : Springer
ISBN 13 : 3709118123
Total Pages : 285 pages
Book Rating : 4.7/5 (91 download)

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Book Synopsis Multiscale Modeling of Complex Materials by : Tomasz Sadowski

Download or read book Multiscale Modeling of Complex Materials written by Tomasz Sadowski and published by Springer. This book was released on 2014-10-14 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers in this volume deal with materials science, theoretical mechanics and experimental and computational techniques at multiple scales, providing a sound base and a framework for many applications which are hitherto treated in a phenomenological sense. The basic principles are formulated of multiscale modeling strategies towards modern complex multiphase materials subjected to various types of mechanical, thermal loadings and environmental effects. The focus is on problems where mechanics is highly coupled with other concurrent physical phenomena. Attention is also focused on the historical origins of multiscale modeling and foundations of continuum mechanics currently adopted to model non-classical continua with substructure, for which internal length scales play a crucial role.

Advances in Heterogeneous Material Mechanics 2008

Author : Jinghong Fan
Publisher : DEStech Publications, Inc
ISBN 13 : 1932078800
Total Pages : 1757 pages
Book Rating : 4.9/5 (32 download)

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Book Synopsis Advances in Heterogeneous Material Mechanics 2008 by : Jinghong Fan

Download or read book Advances in Heterogeneous Material Mechanics 2008 written by Jinghong Fan and published by DEStech Publications, Inc. This book was released on 2008 with total page 1757 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The International Conference on Heterogeneous Material Mechanics (ICHMM) in Huangshan, China, June 3-8, 2008 follows the successful inaugural ICHMM held in ChongQing, China in June, 2004. The ICHMM series is the first international forum that focuses exclusively on various issues related to the behavior of heterogeneous materials in a broad sense. The object of the ICHMM is to present and publicize integrated scientific and engineering approaches to the measurement and modeling of phenomena at the interface of materials science, physics, chemistry, biology, and solid mechanics."--Preface, p. xxxix.

Micromechanics of Heterogeneous Materials

Author : Valeriy Buryachenko
Publisher : Springer Science & Business Media
ISBN 13 : 0387684859
Total Pages : 704 pages
Book Rating : 4.3/5 (876 download)

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Book Synopsis Micromechanics of Heterogeneous Materials by : Valeriy Buryachenko

Download or read book Micromechanics of Heterogeneous Materials written by Valeriy Buryachenko and published by Springer Science & Business Media. This book was released on 2007-09-20 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here is an accurate and timely account of micromechanics, which spans materials science, mechanical engineering, applied mathematics, technical physics, geophysics, and biology. The book features rigorous and unified theoretical methods of applied mathematics and statistical physics in the material science of microheterogeneous media. Uniquely, it offers a useful demonstration of the systematic and fundamental research of the microstructure of the wide class of heterogeneous materials of natural and synthetic nature.

An Introduction to Computational Micromechanics

Author : Tarek I. Zohdi
Publisher : Springer Science & Business Media
ISBN 13 : 9783540228202
Total Pages : 216 pages
Book Rating : 4.2/5 (282 download)

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Book Synopsis An Introduction to Computational Micromechanics by : Tarek I. Zohdi

Download or read book An Introduction to Computational Micromechanics written by Tarek I. Zohdi and published by Springer Science & Business Media. This book was released on 2004-11-18 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this, its second corrected printing, Zohdi and Wriggers’ illuminating text presents a comprehensive introduction to the subject. The authors include in their scope basic homogenization theory, microstructural optimization and multifield analysis of heterogeneous materials. This volume is ideal for researchers and engineers, and can be used in a first-year course for graduate students with an interest in the computational micromechanical analysis of new materials.

Computational Grains

Author : Leiting Dong
Publisher : Cambridge University Press
ISBN 13 : 1108934692
Total Pages : 290 pages
Book Rating : 4.1/5 (89 download)

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Book Synopsis Computational Grains by : Leiting Dong

Download or read book Computational Grains written by Leiting Dong and published by Cambridge University Press. This book was released on 2023-10-19 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the computational tool, Computational Grains, used in micromechanical modeling of heterogeneous materials. Presenting the theory step-by-step and with MATLAB codes, the material is accessible and practical for readers. Ideal for graduate students and researchers in mechanical and aerospace engineering and applied mechanics.

Discrete Element Method to Model 3D Continuous Materials

Author : Mohamed Jebahi
Publisher : John Wiley & Sons
ISBN 13 : 111910291X
Total Pages : 198 pages
Book Rating : 4.1/5 (191 download)

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Book Synopsis Discrete Element Method to Model 3D Continuous Materials by : Mohamed Jebahi

Download or read book Discrete Element Method to Model 3D Continuous Materials written by Mohamed Jebahi and published by John Wiley & Sons. This book was released on 2015-02-26 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex behavior models (plasticity, cracks, visco elascticity) face some theoretical difficulties for the determination of the behavior law at the continuous scale. When homogenization fails to give the right behavior law, a solution is to simulate the material at a meso scale in order to simulate directly a set of discrete properties that are responsible of the macroscopic behavior. The discrete element model has been developed for granular material. The proposed set shows how this method is capable to solve the problem of complex behavior that are linked to discrete meso scale effects.

Local and Nonlocal Micromechanics of Heterogeneous Materials

Author : Valeriy A. Buryachenko
Publisher : Springer Nature
ISBN 13 : 3030817849
Total Pages : 1012 pages
Book Rating : 4.0/5 (38 download)

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Book Synopsis Local and Nonlocal Micromechanics of Heterogeneous Materials by : Valeriy A. Buryachenko

Download or read book Local and Nonlocal Micromechanics of Heterogeneous Materials written by Valeriy A. Buryachenko and published by Springer Nature. This book was released on 2021-11-16 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the micromechanics of random structure heterogeneous materials, a multidisciplinary research area that has experienced a revolutionary renascence at the overlap of various branches of materials science, mechanical engineering, applied mathematics, technical physics, geophysics, and biology. It demonstrates intriguing successes of unified rigorous theoretical methods of applied mathematics and statistical physics in material science of microheterogeneous media. The prediction of the behaviour of heterogeneous materials by the use of properties of constituents and their microstructure is a central problem of micromechanics. This book is the first in micromechanics where a successful effort of systematic and fundamental research of the microstructure of the wide class of heterogeneous materials of natural and synthetic nature is attempted. The uniqueness of the book lies in its development and expressive representation of statistical methods quantitatively describing random structures which are at most adopted for the forthcoming evaluation of a wide variety of macroscopic transport, electromagnetic, strength, and elastoplastic properties of heterogeneous materials.

Particle-Based Methods

Author : Eugenio Oñate
Publisher : Springer Science & Business Media
ISBN 13 : 9400707355
Total Pages : 275 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Particle-Based Methods by : Eugenio Oñate

Download or read book Particle-Based Methods written by Eugenio Oñate and published by Springer Science & Business Media. This book was released on 2011-02-17 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book contains 11 chapters written by relevant scientists in the field of particle-based methods and their applications in engineering and applied sciences. The chapters cover most particle-based techniques used in practice including the discrete element method, the smooth particle hydrodynamic method and the particle finite element method. The book will be of interest to researchers and engineers interested in the fundamentals of particle-based methods and their applications.

Computational Modelling of Concrete Structures

Author : Günther Meschke
Publisher : CRC Press
ISBN 13 : 1351726765
Total Pages : 1034 pages
Book Rating : 4.3/5 (517 download)

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Book Synopsis Computational Modelling of Concrete Structures by : Günther Meschke

Download or read book Computational Modelling of Concrete Structures written by Günther Meschke and published by CRC Press. This book was released on 2018-01-31 with total page 1034 pages. Available in PDF, EPUB and Kindle. Book excerpt: The EURO-C conference series (Split 1984, Zell am See 1990, Innsbruck 1994, Badgastein 1998, St. Johann im Pongau 2003, Mayrhofen 2006, Schladming 2010, St. Anton am Arlberg 2014, and Bad Hofgastein 2018) brings together researchers and practising engineers concerned with theoretical, algorithmic and validation aspects associated with computational simulations of concrete and concrete structures. Computational Modelling of Concrete Structures reviews and discusses research advancements and the applicability and robustness of methods and models for reliable analysis of complex concrete, reinforced concrete and pre-stressed concrete structures in engineering practice. The contributions cover both computational mechanics and computational modelling aspects of the analysis and design of concrete and concrete structures: Multi-scale cement and concrete research: experiments and modelling Aging concrete: from very early ages to decades-long durability Advances in material modelling of plain concrete Analysis of reinforced concrete structures Steel-concrete interaction, fibre-reinforced concrete, and masonry Dynamic behaviour: from seismic retrofit to impact simulation Computational Modelling of Concrete Structures is of special interest to academics and researchers in computational concrete mechanics, as well as industry experts in complex nonlinear simulations of concrete structures.

Proceedings of Crack Paths (CP 2012), Gaeta, Italy 2012

Author :
Publisher : Gruppo Italiano Frattura
ISBN 13 : 889594044X
Total Pages : 1170 pages
Book Rating : 4.8/5 (959 download)

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Book Synopsis Proceedings of Crack Paths (CP 2012), Gaeta, Italy 2012 by :

Download or read book Proceedings of Crack Paths (CP 2012), Gaeta, Italy 2012 written by and published by Gruppo Italiano Frattura. This book was released on 2012-09-19 with total page 1170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Heterogeneous Materials

Author : Muhammad Sahimi
Publisher : Springer Science & Business Media
ISBN 13 : 0387001662
Total Pages : 650 pages
Book Rating : 4.3/5 (87 download)

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Book Synopsis Heterogeneous Materials by : Muhammad Sahimi

Download or read book Heterogeneous Materials written by Muhammad Sahimi and published by Springer Science & Business Media. This book was released on 2003-05-15 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph describes and discusses the properties of heterogeneous materials, comparing two fundamental approaches to describing and predicting materials’ properties. This multidisciplinary book will appeal to applied physicists, materials scientists, chemical and mechanical engineers, chemists, and applied mathematicians.