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Micromechanics and Nanosimulation of Metals and Composites: Advanced Methods and Theoretical Concepts 2009 [Hardback]

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  • Formāts: Hardback, 420 pages, height x width: 235x155 mm, weight: 1750 g, XV, 420 p., 1 Hardback
  • Izdošanas datums: 28-Oct-2008
  • Izdevniecība: Springer-Verlag Berlin and Heidelberg GmbH & Co. K
  • ISBN-10: 3540786775
  • ISBN-13: 9783540786771
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Micromechanics and Nanosimulation of Metals and Composites: Advanced Methods and Theoretical Concepts 2009Palielināt
  • Formāts: Hardback, 420 pages, height x width: 235x155 mm, weight: 1750 g, XV, 420 p., 1 Hardback
  • Izdošanas datums: 28-Oct-2008
  • Izdevniecība: Springer-Verlag Berlin and Heidelberg GmbH & Co. K
  • ISBN-10: 3540786775
  • ISBN-13: 9783540786771
Citas grāmatas par šo tēmu:
Permanent link: https://www.kriso.lv/db/9783540786771.html
Keywords:
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.
Preface IX
Acknowledgements XI
References XIII
1 Micromechanical experiments 1
1.1 Micromechanisms offracture in Al/SiC composites
2
1.1.1 Experimental procedure
2
1.1.2 Results of experiments and analysis
3
1.2 In-situ observation of damage evolution and fracture in AlSi cast alloys
14
1.2.1 Failure mechanisms of ductile materials
14
1.2.2 Experimental procedure
16
1.2.3 Experimental observations
18
1.2.4 Analysis of results
23
1.3 Micromechanisms of damage initiation and growth in tool steels
29
1.3.1 Micromechanisms of damage initiation in tool steels
29
1.3.2 Condition of failure of primary carbides in tool steels
33
2 Micromechanical simulation of composites 37
2.1 Embedded unit cells
42
2.1.1 Model formulation
44
2.1.2 Systematic studies with self-consistent embedded cell models
54
2.2 Multiphase finite elements
65
2.2.1 3D multiphase finite element method
65
2.2.2 Multiphase finite element method and damage analysis
76
2.3 Automatic generation of 3D microstructure-based finite element models
89
2.3.1 Idealized microstructures of particle reinforced composites: multiparticle unit cells with spherical inclusions
89
2.3.2 Step-by-step packing approach to the 3D microstructural model generation and quasi-static analysis of elasto-plastic behavior of composites
110
3 Simulation of damage and fracture 127
3.1 Crack growth in multiphase materials
129
3.1.1 Failure phenomena and criteria for crack extension
129
3.1.2 Micromechanics of deformation in multiphase materials
131
3.2 Ductile damage and fracture
138
3.2.1 Numerical modelling of damage and fracture in Al/SiC composites: element removal method
138
3.2.2 FE analysis of fracture of WC-Co alloys: microvoid growth
144
3.2.3 Micromechanical simulation of crack growth in WC/Co using embedded unit cells
157
3.3 Damage and fracture of tool steels
164
3.3.1 Modeling of crack propagation in real and artificial microstructures of tool steels: simple microstructures
164
3.3.2 FE models of crack propagation tool steels: comparison of techniques and complex microstructures
184
3.4 Interface fracture: elastic and plastic fracture energies of metal/ceramic joints
203
3.4.1 Concept of modelling
203
3.4.2 Results
205
4 Complex, graded and interpenetrating microstructures 213
4.1 Interpenetrating phase materials: matricity model and its applications
215
4.1.1 Matricity model approach
215
4.1.2 Some applications of the matricity model
227
4.2 Graded materials: mesoscale modelling
240
4.2.1 Multilayer model and functionally graded finite elements: application to the graded hardmetals
240
4.2.2 Graded multiparticle unit cells: damage analysis of metal matrix composites
248
4.2.3 Voxel-based FE mesh generation and damage analysis of composites
275
4.3 Material with structure gradient for milling applications: modelling and testing
299
5 Atomistic and dislocation modelling 311
5.1 Embedded atom potential for Fe-Cu interactions
313
5.1.1 Interatomic potentials for the pure components
314
5.1.2 Results for the Fe-Cu interaction
315
5.2 Atomistic simulations of deformation and fracture of α-Fe
323
5.2.1 Model and method
323
5.2.2 Results: stress-strain curves and fracture patterns
326
5.3 Atomistic study of void growth in single crystalline copper
342
5.3.1 Modelling approach
343
5.3.2 Results: influence of the crystal orientation of void growth
349
5.4 Atomic scale modelling of edge dislocation movement in the α-Fe-Cu system
363
5.4.1 The movement of an edge dislocation hitting a Cu precipitate
366
5.4.2 Derivation of dispersion strengthening from modelling
371
5.5 Molecular dynamics study on low temperature brittleness in tungsten
375
5.5.1 A combined model of molecular dynamics with micromechanics
377
5.5.2 Transformation from an atomistic dislocation to an elastic dislocation
379
5.5.3 Simulation of a brittle fracture process in tungsten single crystals
382
5.6 Simulation of the formation of Cu-precipitates in steels
395
5.6.1 Monte Carlo simulations
396
5.6.2 Simulation results: formation and growth of precipitates at different temperatures
401
5.7 Atomistic simulation of the pinning of edge dislocations
412
5.7.1 Molecular dynamics simulations for the analysis of the interaction of dislocations and precipitates
413
5.7.2 Determination of critical resolved shear stresses
414
Index 419
Siegfried Schmauder



Professor Dr. Siegfried Schmauder is currently a Professor of Materials Science and Strength of Materials, at the University of Stuttgart, Germany. He graduated in Mathematics from the University of Stuttgart in 1981, and received his Dr. rer. nat. degree from the same University in 1988. After his work as a research group leader at the Max-Planck-Insitute for Metals Research and postdoctoral research stays at the .Tokyo and at the University of California at Santa Barbara (UCSB), USA, he accepted an offer to become a Professor at the State Materials testing Agency (MPA), University of Stuttgart. He is an Editor-in-Chief of the Journal Computational Materials Science, and author of more than 300 research papers in the field of nano- and micromechanics.









Leon Mishnaevsky Jr.



Leon Mishnaevsky Jr. is a Senior Scientist at the Risų National Laboratory, Denmark. Prior to joining Risų, he worked as a research scientist and later as a Heisenberg Fellow at the University of Stuttgart, and at the Darmstadt University of Technology. LM received his Dr. -Ing. Habil. degree in Mechanics from the Darmstadt University of Technology, Germany, and his doctorate from the USSR Academy of Sciences. He has held visiting professor/visiting scholar positions at M.I.T. and Rutgers (USA), University of Tokyo (Japan), China University of Mining and Technology (China) and Ecole Nationale Superieure d'Arts et Metiers (France). He published books on "Computational mesomechanics of composites" and "Damage and fracture in heterogeneous materials", and over 100 research papers in different areas of computational mechanics of materials, micromechanics and mechanical engineering.