Numerical simulations of microstructures using the <Emphasis Type="Italic">Elle</Emphasis> platform: A modern research and teaching tool |
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| Authors: | S Piazolo M W Jessell P D Bons L Evans J K Becker |
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| Institution: | 1.Department of Geology and Geochemistry,Stockholm University,Stockholm,Sweden;2.UMR5563, IRD UR 154, Laboratoire des Mécanismes et Transferts en Géologie,Université Paul-Sabatier,Toulouse cedex,France;3.Mineralogie und Geodynamik, Institut für Geowissenschaften,Eberhard Karls Universit?t Tübingen,Tübingen,Germany;4.School of Earth Sciences,University of Melbourne,Melbourne,Australia |
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| Abstract: | The last 20 years have seen a manifold increase in the application of numerical simulations in the earth sciences. This contribution
aims to provide an overview of the possibilities of using numerical techniques, in particular the numerical simulation package
Elle, as an aid in the training for microstructural interpretation in rocks. Three sets of experiments are described to illustrate
the range of simulations currently possible, investigating the effects of grain growth, polyphase deformation and dynamic
recrystallisation.
Numerical simulations of static annealing of a pre-deformed natural sample show that Crystallographic Preferred Orientations
can still be used for the interpretation of kinematic and deformation conditions, even after substantial postdeformational
annealing. However, the grain network characteristics such as grain size, grain size distribution, boundary shapes and aspect
ratios are rapidly altered during annealing, especially if the grains possessed highly contrasting internal strain energies. |
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