Modelling thin film microbending: A comparative study of three different approaches

Katerina E. Aifantis, Nikos Nikitas, Michael Zaiser

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Constitutive models which describe crystal microplasticity in a continuum framework can be envisaged as average representations of the dynamics of dislocation systems. Thus, their performance needs to be assessed not only by their ability to correctly represent stress-strain characteristics on the specimen scale but also by their ability to correctly represent the evolution of internal stress and strain patterns. In the present comparative study we consider the bending of a free-standing thin film. We compare the results of 3D DDD simulations with those obtained from a simple 1D gradient plasticity model and a more complex dislocation-based continuum model. Both models correctly reproduce the nontrivial strain patterns predicted by DDD for the microbending problem.

Original languageEnglish (US)
Title of host publicationNumerical Analysis and Applied Mathematics, ICNAAM 2011 - International Conference on Numerical Analysis and Applied Mathematics
Pages1526-1529
Number of pages4
DOIs
StatePublished - Nov 28 2011
EventInternational Conference on Numerical Analysis and Applied Mathematics: Numerical Analysis and Applied Mathematics, ICNAAM 2011 - Halkidiki, Greece
Duration: Sep 19 2011Sep 25 2011

Publication series

NameAIP Conference Proceedings
Volume1389
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Conference on Numerical Analysis and Applied Mathematics: Numerical Analysis and Applied Mathematics, ICNAAM 2011
CountryGreece
CityHalkidiki
Period9/19/119/25/11

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Keywords

  • Dislocations
  • plasticity
  • yield stress

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Aifantis, K. E., Nikitas, N., & Zaiser, M. (2011). Modelling thin film microbending: A comparative study of three different approaches. In Numerical Analysis and Applied Mathematics, ICNAAM 2011 - International Conference on Numerical Analysis and Applied Mathematics (pp. 1526-1529). (AIP Conference Proceedings; Vol. 1389). https://doi.org/10.1063/1.3637916