Extension of the Gurson model accounting for the void size effect

Jie Wen, Keh Chih Hwang*, Yonggang Huang

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A continuum model of solids with cylindrical microvoids is proposed based on the Taylor dislocation model. The model is an extension of Gurson model in the sense that the void size effect is accounted for. Beside the void volume fraction f, the intrinsic material length l becomes a parameter representing voids since the void size comes into play in the Gurson model. Approximate yield functions in analytic forms are suggested for both solids with cylindrical microvoids and with spherical microvoids. The application to uniaxial tension curves shows a precise agreement between the approximate analytic yield function and the exact parametric form of integrals.

Original languageEnglish (US)
Pages (from-to)142-150
Number of pages9
JournalActa Mechanica Sinica/Lixue Xuebao
Volume21
Issue number2
DOIs
StatePublished - Apr 1 2005

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Keywords

  • Gurson model
  • Taylor dislocation model
  • Void size effect
  • Yield condition

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanical Engineering

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