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==1 Title, abstract and keywords<!-- Your document should start with a concise and informative title. Titles are often used in information-retrieval systems. Avoid abbreviations and formulae where possible. Capitalize the first word of the title.
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== Abstract ==
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The macroscale mechanical behaviour of crystalline materials, such as polycrystalline metals and single crystal semiconductors, is dictated by the anisotropic behaviour of individual crystals/grains and their interactions with neighboring crystals or other materials. Furthermore, the elastic-plastic response of individual crystals is associated with the underlying atomic lattice structure and phenomena of dislocation glide on the slip systems and dislocation multiplication and interactions. As a result, microstructural characteristics such as grain size, shape, and orientation, have a significant effect on the macroscale mechanical properties and performance. Moreover, these microstructural features are strongly affected by the thermal-mechanical process used to create a part. Because of this, tremendous effort has been made to develop crystal plasticity models that explicitly model the crystal (grain) scale behavior to predict the local macroscale response.
  
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Provide a maximum of 6 keywords, and avoiding general and plural terms and multiple concepts (avoid, for example, 'and', 'of'). Be sparing with abbreviations: only abbreviations firmly established in the field should be used. These keywords will be used for indexing purposes.
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In this talk, a framework for computational modelling of discretized single or polycrystal grain structures subjected to thermal-mechanical loading conditions is presented. The model is general for finite deformations with the crystal plasticity model based on dislocation motion and interactions. A parallel finite element implementation is briefly described. Then, applications including predicting microstructure evolution during large deformation processing, fatigue crack initiation, and defect formation during single crystal AlN crystal growth will be presented
  
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An abstract is required for every document; it should succinctly summarize the reason for the work, the main findings, and the conclusions of the study. Abstract is often presented separately from the article, so it must be able to stand alone. For this reason, references and hyperlinks should be avoided. If references are essential, then cite the author(s) and year(s). Also, non-standard or uncommon abbreviations should be avoided, but if essential they must be defined at their first mention in the abstract itself. -->==
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== Recording of the presentation ==
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{| style="font-size:120%; color: #222222; border: 1px solid darkgray; background: #f3f3f3; table-layout: fixed; width:100%;"
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| {{#evt:service=youtube|id=https://www.youtube.com/watch?v=WPU6vsGVjv8 | alignment=center}}
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|- style="text-align: center;"
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| Location: Technical University of Catalonia (UPC), Vertex Building.  
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|- style="text-align: center;"
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| Date: 1 - 3 September 2015, Barcelona, Spain.
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== General Information ==
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* Location: Technical University of Catalonia (UPC), Barcelona, Spain.
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* Date: 1 - 3 September 2015
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* Secretariat: [//www.cimne.com/ International Center for Numerical Methods in Engineering (CIMNE)].
  
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== External Links ==
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* [//congress.cimne.com/complas2015/frontal/default.asp Complas XIII] Official Website of the Conference.
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* [//www.cimnemultimediachannel.com/ CIMNE Multimedia Channel]
  
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==References==
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==2 The main text<!-- You can enter and format the text of this document by selecting the ‘Edit’ option in the menu at the top of this frame or next to the title of every section of the document. This will give access to the visual editor. Alternatively, you can edit the source of this document (Wiki markup format) by selecting the ‘Edit source’ option.
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[[#cite-1|[1]]] A.M. Maniatty and P. Karvani, “Constitutive relations for modeling single crystal GaN at
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elevated temperatures,” J. Engng. Mater. Tech., 137, 011002 (2015).
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[[#cite-2|[2]]] D.M. Pyle, J. Lu, D.J. Littlewood, and A.M. Maniatty, “Effect of 3D grain structure
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representation in polycrystal simulations,” Comp. Mech., 52, 135-150 (2013).
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[[#cite-3|[3]]] J.D. Hochhalter, D.J. Littlewood, R.J. Christ Jr., M.G. Veilleux, J.E. Bozek, A.R. Ingraffea, and
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A.M. Maniatty, “A geometric approach to modeling microstructurally small fatigue crack
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formation, part II: simulation and prediction of crack nucleation in AA 7075-T651.” Modell.
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Simul. Mater. Sci. Eng., 18, 045004 (2010).
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[[#cite-4|[4]]] A.M. Maniatty, G.S. Cargill III, L.E. Moyer, and C-J. Yang, “Investigation of thermal stress
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variability due to microstructure in thin aluminum films.” J. Appl. Mech., 78, 011012-1-9
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(2011).
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Revision as of 12:55, 13 September 2018

Abstract

The macroscale mechanical behaviour of crystalline materials, such as polycrystalline metals and single crystal semiconductors, is dictated by the anisotropic behaviour of individual crystals/grains and their interactions with neighboring crystals or other materials. Furthermore, the elastic-plastic response of individual crystals is associated with the underlying atomic lattice structure and phenomena of dislocation glide on the slip systems and dislocation multiplication and interactions. As a result, microstructural characteristics such as grain size, shape, and orientation, have a significant effect on the macroscale mechanical properties and performance. Moreover, these microstructural features are strongly affected by the thermal-mechanical process used to create a part. Because of this, tremendous effort has been made to develop crystal plasticity models that explicitly model the crystal (grain) scale behavior to predict the local macroscale response.

In this talk, a framework for computational modelling of discretized single or polycrystal grain structures subjected to thermal-mechanical loading conditions is presented. The model is general for finite deformations with the crystal plasticity model based on dislocation motion and interactions. A parallel finite element implementation is briefly described. Then, applications including predicting microstructure evolution during large deformation processing, fatigue crack initiation, and defect formation during single crystal AlN crystal growth will be presented

Recording of the presentation

Location: Technical University of Catalonia (UPC), Vertex Building.
Date: 1 - 3 September 2015, Barcelona, Spain.

General Information

External Links

References

[1] A.M. Maniatty and P. Karvani, “Constitutive relations for modeling single crystal GaN at elevated temperatures,” J. Engng. Mater. Tech., 137, 011002 (2015).

[2] D.M. Pyle, J. Lu, D.J. Littlewood, and A.M. Maniatty, “Effect of 3D grain structure representation in polycrystal simulations,” Comp. Mech., 52, 135-150 (2013).

[3] J.D. Hochhalter, D.J. Littlewood, R.J. Christ Jr., M.G. Veilleux, J.E. Bozek, A.R. Ingraffea, and A.M. Maniatty, “A geometric approach to modeling microstructurally small fatigue crack formation, part II: simulation and prediction of crack nucleation in AA 7075-T651.” Modell. Simul. Mater. Sci. Eng., 18, 045004 (2010).

[4] A.M. Maniatty, G.S. Cargill III, L.E. Moyer, and C-J. Yang, “Investigation of thermal stress variability due to microstructure in thin aluminum films.” J. Appl. Mech., 78, 011012-1-9 (2011).

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