A link between microstructure evolution and macroscopic response in elasto-plasticity: Formulation and numerical approximation of the higher-dimensional continuum dislocation dynamics theory

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Sandfeld S, Thawinan E, Wieners C
Zeitschrift: International Journal of Plasticity
Verlag: Elsevier
Jahr der Veröffentlichung: 2015
Band: 72
Seitenbereich: 1-20
ISSN: 0749-6419


Abstract


Micro-plasticity theories and models are suitable to explain and predict mechanical response of devices on length scales where the influence of the carrier of plastic deformation - the dislocations - cannot be neglected or completely averaged out. To consider these effects without resolving each single dislocation a large variety of continuum descriptions has been developed, amongst which the higher-dimensional continuum dislocation dynamics (hdCDD) theory by Hochrainer et al. (Phil. Mag. 87, pp. 1261-1282) takes a different, statistical approach and contains information that are usually only contained in discrete dislocation models. We present a concise formulation of hdCDD in a general single-crystal plasticity context together with a discontinuous Galerkin scheme for the numerical implementation which we evaluate by numerical examples: a thin film under tensile and shear loads. We study the influence of different realistic boundary conditions and demonstrate that dislocation fluxes and their lines' curvature are key features in small-scale plasticity.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Sandfeld, Stefan Dr.
Lehrstuhl für Werkstoffsimulation


Zitierweisen

APA:
Sandfeld, S., Thawinan, E., & Wieners, C. (2015). A link between microstructure evolution and macroscopic response in elasto-plasticity: Formulation and numerical approximation of the higher-dimensional continuum dislocation dynamics theory. International Journal of Plasticity, 72, 1-20. https://dx.doi.org/10.1016/j.ijplas.2015.05.001

MLA:
Sandfeld, Stefan, E Thawinan, and C Wieners. "A link between microstructure evolution and macroscopic response in elasto-plasticity: Formulation and numerical approximation of the higher-dimensional continuum dislocation dynamics theory." International Journal of Plasticity 72 (2015): 1-20.

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