Validation of Modified Lemaitre's Anisotropic Damage Model with the Cross Die Drawing Test

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Abstract

Dual Phase (DP) steels are widely replacing the traditional forming steels in automotive industry. Advanced damage models are required to accurately predict the formability of DP steels. In this work, Lemaitre’s anisotropic damage model has been slightly modified for sheet metal forming applications and for strain rate dependent materials. The damage evolution law is adapted to take into account the strain rate dependency and negative triaxialities. The damage parameters for pre-production DP600 steel were determined. The modified damage models (isotropic and anisotropic) were validated using the cross die drawing test. The anisotropic damage model predicts the crack direction more accurately.
Original languageEnglish
Pages (from-to)49-52
Number of pages4
JournalKey engineering materials
Volume488-489
DOIs
Publication statusPublished - 2011

Keywords

  • Anisotropic damage
  • DP steels
  • IR-77898
  • Strain rate dependency
  • METIS-277995
  • Cross die drawing

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