International Journal of Fracture

, Volume 144, Issue 1, pp 53–60 | Cite as

A One-Dimensional Nonlocal Damage-Plasticity Model for Ductile Materials

  • Jonathan P. Belnoue
  • Giang D. Nguyen
  • Alexander M. Korsunsky
Letters in Fracture in Micromechanics


This paper presents a new 1-D non-local damage-plasticity deformation model for ductile materials. It uses the thermodynamic framework described in Houlsby and Puzrin (2000) and holds, nevertheless, some similarities with Lemaitre’s (1971) approach. A 1D finite element (FE) model of a bar fixed at one end and loaded in tension at the other end is introduced. This simple model demonstrates how the approach can be implemented within the finite element framework, and that it is capable of capturing both the pre-peak hardening and post-peak softening (generally responsible for models instability) due to damage-induced stiffness and strength reduction characteristic of ductile materials. It is also shown that the approach has further advantages of achieving some degree of mesh independence, and of being able to capture deformation size effects. Finally, it is illustrated how the model permits the calculation of essential work of rupture (EWR), i.e. the specific energy per unit cross-sectional area that is needed to cause tensile failure of a specimen.


metallic materials plasticity damage softening fracture energy 


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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Jonathan P. Belnoue
    • 1
  • Giang D. Nguyen
    • 2
  • Alexander M. Korsunsky
    • 1
  1. 1.Department of Engineering ScienceUniversity of OxfordOxfordEngland
  2. 2.Department of Mathematics and StatisticsUniversity of New MexicoAlbuquerqueU.S.A

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