A dilatational plasticity theory for viscoplastic materials

B. Chen, Y. Huang*, C. Liu, P. D. Wu, S. R. MacEwen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The dilatational plasticity theory of [J. Engng. Mater. Tech. 99 (1977) 2] is generalized in this paper for viscoplastic materials. A unit-cell model of a viscoplastic matrix containing a microvoid is adopted to establish the viscoplastic constitutive relations for voided, dilating materials. Approximate analytic constitutive relations are proposed, which not only have the correct asymptotic limits but also agree well with the unit-cell model.

Original languageEnglish (US)
Pages (from-to)679-689
Number of pages11
JournalMechanics of Materials
Issue number8
StatePublished - Aug 2004


  • Dilatational plasticity
  • Gurson model
  • Viscoplastic material
  • Void growth

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Mechanics of Materials


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