Some limitations of dislocation walls as models for plast boundary layers

Michael Zaiser, I. Groma

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

3 Citations (Scopus)

Abstract

It has recently become popular to analyze the behavior of excess dislocations in plastic deformation under the assumption that such dislocations are arranged into walls with periodic dislocation spacing along the wall direction. This assumption is made plausible by the fact that periodic walls represent minimum energy arrangements for dislocations of the same sign, and it allows to use the analytically known short-ranged stress fields of such walls for analyzing the structure of plastic boundary layers. Here we show that unfortunately both the idea that dislocation walls are low-energy configurations and the properties of their interactions depend critically on the assumption of a periodic arrangement of dislocations within the walls. Once this assumption is replaced by a random arrangement, the properties of dislocation walls change completely.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages1540-1543
Number of pages4
Volume1389
DOIs
Publication statusPublished - 2011
EventInternational Conference on Numerical Analysis and Applied Mathematics: Numerical Analysis and Applied Mathematics, ICNAAM 2011 - Halkidiki, Greece
Duration: Sep 19 2011Sep 25 2011

Other

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

Fingerprint

boundary layers
stress distribution
plastic deformation
plastics
spacing
energy
configurations
interactions

Keywords

  • Dislocations
  • plasticity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Some limitations of dislocation walls as models for plast boundary layers. / Zaiser, Michael; Groma, I.

AIP Conference Proceedings. Vol. 1389 2011. p. 1540-1543.

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

Zaiser, M & Groma, I 2011, Some limitations of dislocation walls as models for plast boundary layers. in AIP Conference Proceedings. vol. 1389, pp. 1540-1543, International Conference on Numerical Analysis and Applied Mathematics: Numerical Analysis and Applied Mathematics, ICNAAM 2011, Halkidiki, Greece, 9/19/11. https://doi.org/10.1063/1.3637921
Zaiser, Michael ; Groma, I. / Some limitations of dislocation walls as models for plast boundary layers. AIP Conference Proceedings. Vol. 1389 2011. pp. 1540-1543
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