Bicrystal-based modeling of plasticity in FCC metals

B. J. Lee, Said Ahzi, D. M. Parks

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

In this paper, intermediate modeling of polycrystalline plasticity is proposed for rigid viscoplatic large deformations. This approach is based on the use of a bicrystal as the elementary local element representing the poly-crystal. The local homogenization is obtained by considering the bicrystal volume-averaging and the jump conditions at the assumed planar interface between the two crystals. Two interaction laws based on Taylor and Sachs type assumptions are proposed. These bicrystal-based averaging schemes are different from the classical Taylor and Sachs models since they allow for stresses and strains to vary from one single crystal to the other. We simulate uniaxial tension and compression as well as plane strain compression tests. Results in terms of stress-strain curves are shown in comparison to those of the pure Taylor and Sachs models. We also show results for texture evolution and discuss their comparison with the experimental measurements.

Original languageEnglish
Pages (from-to)27-40
Number of pages14
JournalJournal of Engineering Materials and Technology, Transactions of the ASME
Volume124
Issue number1
DOIs
Publication statusPublished - Jan 2002
Externally publishedYes

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ASJC Scopus subject areas

  • Mechanical Engineering
  • Materials Science(all)

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