The use of coupled nonlocal damage-plasticity to predict crack growth in ductile metal plates

Jonathan P. Belnoue, Barry Garnham, Martin Bache, Alexander M. Korsunsky

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

A nonlocal coupled damage-plasticity model is presented for predicting crack growth within plates made from a ductile metallic alloy. The damage law is explicitly defined in terms of the accumulated nonlocal plastic strain ensuring efficient numerical implementation. On the basis of this model, a UMAT for the finite element (FE) package ABAQUS (implicit) is developed. Thin plates of different geometries were modelled and analysed using this model, and the numerical stability of the model has been verified. The model shows the ability to capture the post-peak softening behaviour, shows mesh independence, and requires calibration of parameters against experimental data. The suitability of the model for crack path prediction is discussed.

Original languageEnglish
Pages (from-to)1721-1729
Number of pages9
JournalEngineering Fracture Mechanics
Volume77
Issue number11
DOIs
Publication statusPublished - Jul 2010
Externally publishedYes

Keywords

  • Crack growth
  • Crack path prediction
  • Ductile metals
  • Nonlocal damage-plasticity

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