The evolution of yielding in 7075-O aluminium alloy: experimental observations and modelling

  • N. E. Anderson
  • A. G. Leacock
  • R. J. McMurray
  • D. Brown
Material behaviour and formability: F. Barlat, D. Banabic, O.Cazacu, T. Kuwabara, L. Delannay


It is widely accepted that the yielding of materials can be modelled to a satisfactory degree of accuracy. However the hardening behaviour is a topic that needs attention. Recent experiments explored the evolution of hardening of sheet metals with off-axis straining, raising much debate about the nature of the behaviour. In light of these results this paper aims to characterise the hardening behaviour observed due to pre-straining in the sheet rolling direction. Aluminium alloy 7075-O is used for the examination. Further to this, the adequacy of the Leacock (2006) yield criterion in representing this behaviour is assessed. Using this representation the discrete yielding behaviour of 7075-O is successfully modelled.


Anisotropic hardening Aluminium Yield criterion 


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Copyright information

© Springer/ESAFORM 2009

Authors and Affiliations

  • N. E. Anderson
    • 1
  • A. G. Leacock
    • 1
  • R. J. McMurray
    • 1
  • D. Brown
    • 1
  1. 1.Advanced Metal Forming Research Group, Nanotechnology and Advanced Materials Research InstituteUniver- sity of UlsterAntrimN. Ireland

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