A dislocation-crystal plasticity simulation on large deformation considering geometrically necessary dislocation density and incompatibility (2nd report, application to FCC single crystal)

Yoshiteru Aoyagi, Kazuyuki Shizawa

研究成果: Article

1 引用 (Scopus)

抄録

In the previous paper, the GN incompatibility is newly defined and a new annihilation term of a dislocation pair due to the dynamic recovery is introduced into an expression of dislocation density. Furthermore, a multiscale model of crystal plasticity is proposed by considering GN dislocation density and incompatibility. However, details of dislocation-crystal plasticity simulation are not given. In this paper, we explain a method of dislocation-crystal plasticity analysis. A finite element simulation is carried out for an f.c.c. single crystal under plane strain tension. It is numerically predicted that micro shear bands are formed at large strain, and sub-GNBs: small angle tilt boundaries are induced along these bands. Furthermore, the annihilation of dislocation pair and the increase of dislocation mean free path characterizing stage III of work-hardening are computationally predicted.

元の言語English
ページ(範囲)1646-1653
ページ数8
ジャーナルNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
72
発行部数11
出版物ステータスPublished - 2006 11

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Dislocations (crystals)
Plasticity
Single crystals
Shear bands
Strain hardening
Recovery
Crystals

ASJC Scopus subject areas

  • Mechanical Engineering

これを引用

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KW - Crystal plasticity

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KW - Geometrically necessary dislocation

KW - Incompatibility

KW - Plasticity

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