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Comparison of mechanical behaviour of thin film simulated by discrete dislocation dynamics and continuum crystal plasticity

Šiška, Filip, Weygand, Daniel, Forest, Samuel and Gumbsch, Peter 2009, Comparison of mechanical behaviour of thin film simulated by discrete dislocation dynamics and continuum crystal plasticity, Computational materials science, vol. 45, no. 3, pp. 793-799, doi: 10.1016/j.commatsci.2008.07.006.

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Title Comparison of mechanical behaviour of thin film simulated by discrete dislocation dynamics and continuum crystal plasticity
Author(s) Šiška, Filip
Weygand, Daniel
Forest, Samuel
Gumbsch, Peter
Journal name Computational materials science
Volume number 45
Issue number 3
Start page 793
End page 799
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2009-05
ISSN 0927-0256
Keyword(s) discrete dislocation dynamics
crystal plasticity
finite elements
polycrystals
thin films
aluminium
Summary 3D finite element simulations of 9-grain multicrystalline aggregates are performed within the framework of the classical continuum crystal plasticity and discrete dislocation dynamics. The results are processed in a statistical way by ensemble averaging. The comparison is made at three levels: macroscopic stress–strain curves, average stress values per grain, local values of stress and plastic strain. The comparison shows that some similarities are observed in the stress and strain distributions in both simulations approaches. But there are also large discrepancies caused by the discrete nature of plasticity in DDD. The DDD simulations provide higher stress levels in the aggregate due to the small number of dislocation sources and to the stress field induced by individual dislocations.
Language eng
DOI 10.1016/j.commatsci.2008.07.006
Field of Research 091307 Numerical Modelling and Mechanical Characterisation
091308 Solid Mechanics
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2008, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30039168

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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