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An extended vertex and crystal plasticity framework for efficient multiscale modeling of polycrystalline materials

Mellbin, Ylva LU ; Hallberg, Håkan LU and Ristinmaa, Matti LU (2017) In International Journal of Solids and Structures 125. p.150-160
Abstract

A multiscale modeling framework for polycrystal materials is established, using a combination of an extended vertex model and a crystal plasticity formulation. The 2D vertex model is cast to incorporate a range of mesoscale processes such as grain structure evolution and the influence of second-phase particles. It is combined with a finite strain crystal plasticity formulation whereby also texture development and stored energy accumulation is traced. Computational efficiency is enhanced by GPU-parallelization. The full model captures a wide range of microstructure processes such as dynamic recrystallization, grain growth, texture evolution, anisotropic grain boundary properties as well as particle pinning effects. The macroscale... (More)

A multiscale modeling framework for polycrystal materials is established, using a combination of an extended vertex model and a crystal plasticity formulation. The 2D vertex model is cast to incorporate a range of mesoscale processes such as grain structure evolution and the influence of second-phase particles. It is combined with a finite strain crystal plasticity formulation whereby also texture development and stored energy accumulation is traced. Computational efficiency is enhanced by GPU-parallelization. The full model captures a wide range of microstructure processes such as dynamic recrystallization, grain growth, texture evolution, anisotropic grain boundary properties as well as particle pinning effects. The macroscale material behavior is directly coupled to the evolving microstructure, for example in terms of a grain size dependent flow stress behavior. Illustrative numerical examples are provided to show the capabilities of the model. For example, the interplay between particle strengthening and grain size influence on macroscopic flow stress behavior is shown, as well as effects due to dynamic recrystallization. Special attention is given to the formulation of the vertex model as the combination of stored energy, particle pinning and anisotropic grain boundary properties give rise to intricate topological transformations which have not been previously addressed.

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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Crystal plasticity, Finite elements, Grain growth, Hall-Petch, Large deformations, Numerical simulation, Particle pinning, Recrystallization, Texture, Vertex model
in
International Journal of Solids and Structures
volume
125
pages
10 pages
publisher
Elsevier
external identifiers
  • scopus:85022179769
  • wos:000412033200011
ISSN
0020-7683
DOI
10.1016/j.ijsolstr.2017.07.009
language
English
LU publication?
yes
id
86f40e0c-c941-423c-ab22-7285e3b94cbd
date added to LUP
2017-07-24 15:15:31
date last changed
2018-04-01 04:34:15
@article{86f40e0c-c941-423c-ab22-7285e3b94cbd,
  abstract     = {<p>A multiscale modeling framework for polycrystal materials is established, using a combination of an extended vertex model and a crystal plasticity formulation. The 2D vertex model is cast to incorporate a range of mesoscale processes such as grain structure evolution and the influence of second-phase particles. It is combined with a finite strain crystal plasticity formulation whereby also texture development and stored energy accumulation is traced. Computational efficiency is enhanced by GPU-parallelization. The full model captures a wide range of microstructure processes such as dynamic recrystallization, grain growth, texture evolution, anisotropic grain boundary properties as well as particle pinning effects. The macroscale material behavior is directly coupled to the evolving microstructure, for example in terms of a grain size dependent flow stress behavior. Illustrative numerical examples are provided to show the capabilities of the model. For example, the interplay between particle strengthening and grain size influence on macroscopic flow stress behavior is shown, as well as effects due to dynamic recrystallization. Special attention is given to the formulation of the vertex model as the combination of stored energy, particle pinning and anisotropic grain boundary properties give rise to intricate topological transformations which have not been previously addressed.</p>},
  author       = {Mellbin, Ylva and Hallberg, Håkan and Ristinmaa, Matti},
  issn         = {0020-7683},
  keyword      = {Crystal plasticity,Finite elements,Grain growth,Hall-Petch,Large deformations,Numerical simulation,Particle pinning,Recrystallization,Texture,Vertex model},
  language     = {eng},
  month        = {07},
  pages        = {150--160},
  publisher    = {Elsevier},
  series       = {International Journal of Solids and Structures},
  title        = {An extended vertex and crystal plasticity framework for efficient multiscale modeling of polycrystalline materials},
  url          = {http://dx.doi.org/10.1016/j.ijsolstr.2017.07.009},
  volume       = {125},
  year         = {2017},
}