Micromechanics and nanosimulation of metals and composites : advanced methods and theoretical concepts / by Siegfried Schmauder, Leon Mishnaevsky.

Format:

Book

Author/Creator:

Schmauder, Siegfried.

Contributor:

Mishnaevsky, L. (Leon)

Language:

English

Subjects (All):

Metals--Microstructure.

Metals.

Micromechanics.

Composite materials.

Physical Description:

xv, 420 pages : illustrations ; 24 cm

Place of Publication:

Berlin ; London : Springer, [2009]

Summary:

This book provides insight into advanced numerical and experimental investigations of the microstructural aspects of strength and damage of metals and metal-based composites. In particular, atomistic and dislocation models, micromechanical simulations and homogenization techniques, as well as experimental observations in combination with computer simulations are described. These methods are successfully applied to analyze the mechanical behavior of metals and metal-matrix composites. Examples of the applications of the described methods include the investigations of microstructure/failure-resistance relationships of tool steels, damage in aluminum-based cast alloys as well as deformation, strnegth and fracture of hard metals. The book addresses scientists, graduate and postgraduate students, as well as engineers in the fields of materials science and engineering.

Contents:

1 Micromechanical experiments 1

1.1 Micromechanisms of fracture 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 steesl: 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 [alpha]-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 [alpha]-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.

Notes:

Includes bibliographical references and index.

ISBN:

9783540786771

3540786775

3540786783

9783540786788

OCLC:

277067550