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2021 | OriginalPaper | Chapter

7. FE Simulation Results

Authors : Christian B. Silbermann, Matthias Baitsch, Jörn Ihlemann

Published in: Introduction to Geometrically Nonlinear Continuum Dislocation Theory

Publisher: Springer International Publishing

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Abstract

This chapter presents numerical solutions of the initial boundary value problem for a continuously dislocated single crystal under plane shear deformation. To this end, the in-house finite element simulation code explained in the preview chapter is adopted. The simulation results are discussed in the light of the theory of complex, pattern forming systems. Additionally, the convergence behavior of the FE solution is examined and numerical challenges are highlighted.

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Appendix
Available only for authorised users
Footnotes
1
The dislocation density in the inactive SS 1 is zero as expected and is therefore not depicted.
 
2
The also frequently observed arrangement of dipoles (dislocations of different signs) at \(45^\circ \) cannot be reproduced with theories that only take GNDs into account [10].
 
3
Even without the thermal problem being considered, the necessary entropy outflow exists by the implicit assumption that all dissipated energy is transferred via heat flow.
 
4
The associated finite elements are called superparametric [18]. If the polynomial degree equals 1, the well-known bilinear functions result.
 
5
Note that this condition is sufficient but not necessary for a reliable and effective finite element scheme [19, 20].
 
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Metadata
Title
FE Simulation Results
Authors
Christian B. Silbermann
Matthias Baitsch
Jörn Ihlemann
Copyright Year
2021
DOI
https://doi.org/10.1007/978-3-030-63696-8_7

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