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A computational concept for the kinetics of defects in anisotropic materials

Kolling, Stefan ; Müller, Ralf ; Gross, Dietmar :
A computational concept for the kinetics of defects in anisotropic materials.
[Online-Edition: http://atom.me.gatech.edu/zhut/Refer/Mueller/Kolling_CompMat...]
In: Computational Materials Science, 26 pp. 87-94. ISSN 0927-0526
[Artikel], (2003)
Note:

SFB 595 C3

Offizielle URL: http://atom.me.gatech.edu/zhut/Refer/Mueller/Kolling_CompMat...

Kurzbeschreibung (Abstract)

In this paper, the idea of Eshelby�s energy–momentum tensor is briefly reconsidered with respect to material defects in solid mechanics. This is used to obtain the thermodynamic driving forces acting on centers of dilatation, dislocations and interfaces of two-phase materials. A simple constitutive kinetic law relates this force with the velocity of the defect. Alternatively, we formulate the kinetics in a statistical sense from Boltzmann�s principle. For an efficient numerical treatment we suggest a semi-analytical method via a finite element formalism. Within this numerical technique, no restrictions on the elastic anisotropy of the material are made. The theory is applied in the situation of a two-phase system.

Typ des Eintrags: Artikel
Erschienen: 2003
Autor(en): Kolling, Stefan ; Müller, Ralf ; Gross, Dietmar
Titel: A computational concept for the kinetics of defects in anisotropic materials
Sprache: Englisch
Kurzbeschreibung (Abstract):

In this paper, the idea of Eshelby�s energy–momentum tensor is briefly reconsidered with respect to material defects in solid mechanics. This is used to obtain the thermodynamic driving forces acting on centers of dilatation, dislocations and interfaces of two-phase materials. A simple constitutive kinetic law relates this force with the velocity of the defect. Alternatively, we formulate the kinetics in a statistical sense from Boltzmann�s principle. For an efficient numerical treatment we suggest a semi-analytical method via a finite element formalism. Within this numerical technique, no restrictions on the elastic anisotropy of the material are made. The theory is applied in the situation of a two-phase system.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Computational Materials Science
Band: 26
Verlag: Elsevier Science B. V.
Freie Schlagworte: Configurational forces; Eshelby-stress; Microstructure; Material defects; Monte Carlo simulation; FEM
Fachbereich(e)/-gebiet(e): FB 06 (Mechanik, 2006 eingegliedert in FB Maschinenbau/Strukturdynamik)
Zentrale Einrichtungen > Sonderforschungsbereich 595 > C - Modellierung > C3
Zentrale Einrichtungen > Sonderforschungsbereich 595 > C - Modellierung
Zentrale Einrichtungen > Sonderforschungsbereich 595
Zentrale Einrichtungen
Hinterlegungsdatum: 20 Nov 2008 08:18
Offizielle URL: http://atom.me.gatech.edu/zhut/Refer/Mueller/Kolling_CompMat...
Zusätzliche Informationen:

SFB 595 C3

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