The finite deformation theory of Taylor-based nonlocal plasticity

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

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


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
Issue number4-5
StatePublished - Apr 2004
Externally publishedYes


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

ASJC Scopus subject areas

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


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