Finite element modelling of damage in superplastic forming of a titanium alloy

High temperature sheet forming: S.B. Leen, G. Bernhart, S. Wagner


This paper describes the application of a continuum damage mechanics methodology to the prediction of failure during superplastic forming of Ti-6Al-4V. A power law constitutive relationship is employed within a geometrically non-linear finite element model of the forming process and a user subroutine is developed to implement the damage mechanics approach. The damage constants are identified from uniaxial rupture strains from constant strain- rate tests. The multiaxial implementation is successfully used to predict damage evolution during forming of a truncated cone and is shown to predict results consistent with the experimental results from forming trials.


Superplastic forming Ti-6Al-4V Damage mechanics Failure prediction 


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© Springer/ESAFORM 2009

Authors and Affiliations

  1. 1.Formerly Division of Materials, Mechanics and StructuresUniversity of NottinghamNottinghamUK
  2. 2.Department of Mechanical and Biomedical EngineeringNational University of IrelandGalwayIreland
  3. 3.Division of Materials, Mechanics and StructuresUniversity of NottinghamNottinghamUK

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