Nonlocal plasticity effects on interaction of different size voids

Research output: Contribution to journalJournal articleResearchpeer-review


A nonlocal elastic-plastic material model is used to show that the rate of void growth is significantly reduced when the voids are small enough to be comparable with a characteristic material length. For a very small void in the material between much larger voids the competition between an increased growth rate due to the stress concentrations around the larger voids and a reduced growth rate due to the nonlocal effects is studied. The analyses are based on an axisymmetric unit cell model with special boundary conditions, which allow for a relatively simple investigation of a full three dimensional array of spherical voids. It is shown that the high growth rate of very small voids predicted by conventional plasticity theory is not realistic when the effect of a characteristic length, dependent on the dislocation structure, is accounted for. (C) 2003 Elsevier Ltd. All rights reserved.
Original languageEnglish
JournalInternational Journal of Plasticity
Issue number1
Pages (from-to)107-120
Publication statusPublished - 2004


  • Plasticity
  • Voids
  • Instability
  • Ductile fracture


Dive into the research topics of 'Nonlocal plasticity effects on interaction of different size voids'. Together they form a unique fingerprint.

Cite this