Název:
Thermodynamics of Dislocation Pattern Formation at the Mesoscale
Autoři:
Gröger, Roman Typ dokumentu: Příspěvky z konference Konference/Akce: MSMF 7 - International Conference on Materials Structure and Micromechanics of Fracture /7./, Brno (CZ), 20130701
Rok:
2014
Jazyk:
eng
Edice: Key Engineering Materials
Abstrakt: We introduce a mesoscopic framework that is capable of simulating the evolution of dislocation networks and, at the same time, spatial variations of the stress, strain and displacement fields throughout the body. Within this model, dislocations are viewed as sources of incompatibility of strains. The free energy of a deformed solid is represented by the elastic strain energy that can be augmented by gradient terms to reproduce dispersive nature of acoustic phonons and thus set the length scale of the problem. The elastic strain field that is due to a known dislocation network is obtained by minimizing the strain energy subject to the corresponding field of incompatibility constraints. These stresses impose Peach-Koehler forces on all dislocations and thus drive the evolution of the dislocation network.
Klíčová slova:
dislocation; incompatibility; mesoscale; Nye tensor; pattern; thermodynamics Číslo projektu: ED1.1.00/02.0068 Poskytovatel projektu: GA MŠk Zdrojový dokument: Materials Structure and Micromechanics of Fracture VII, ISBN 978-3-03785-934-6, ISSN 1013-9826
Instituce: Ústav fyziky materiálů AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0279596