The finite deformation theory of Taylor-based nonlocal plasticity

K. C. Hwang, Y. Guo, H. Jiang, Y. Huang*, Z. Zhuang

*Corresponding author for this work

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Recent experiments have shown that metallic materials display significant size effect at the micron and sub-micron scales. This has motivated the development of strain gradient plasticity theories, which usually involve extra boundary conditions and possibly higher-order governing equations. We propose a finite deformation theory of nonlocal plasticity based on the Taylor dislocation model. The theory falls into Rice's theoretical framework of internal variables [J Mech Phys Solids 19 (1971) 433], and it does not require any extra boundary conditions. We apply the theory to study the micro-indentation hardness experiments, and it agrees very well with the experimental data over a wide range of indentation depth.

Original languageEnglish (US)
Pages (from-to)831-839
Number of pages9
JournalInternational journal of plasticity
Volume20
Issue number4-5
DOIs
StatePublished - Apr 1 2004

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Indentation
Plasticity
Boundary conditions
Experiments
Hardness

Keywords

  • Finite deformation
  • Micro-indentation hardness
  • Nonlocal plasticity theory
  • Taylor dislocation model

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Hwang, K. C. ; Guo, Y. ; Jiang, H. ; Huang, Y. ; Zhuang, Z. / The finite deformation theory of Taylor-based nonlocal plasticity. In: International journal of plasticity. 2004 ; Vol. 20, No. 4-5. pp. 831-839.
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The finite deformation theory of Taylor-based nonlocal plasticity. / Hwang, K. C.; Guo, Y.; Jiang, H.; Huang, Y.; Zhuang, Z.

In: International journal of plasticity, Vol. 20, No. 4-5, 01.04.2004, p. 831-839.

Research output: Contribution to journalArticle

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