Investigation of the Beginning of Plastic Yielding and the Hardening Behaviour under Biaxial Tension

Sebastian Suttner; Andreas Kuppert

doi:10.4028/www.scientific.net/AMR.769.197

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 769Investigation of the Beginning of Plastic Yielding...

Investigation of the Beginning of Plastic Yielding and the Hardening Behaviour under Biaxial Tension

Abstract:

The main focus of the experimental observation deals with the investigation of the plasticyielding of DC06 and DP600 under biaxial tension in comparison to an identified material modelwith an isotropic hardening behaviour. The isotropic hardening law describes the hardeningbehaviour of the material by application and approximation of the flow curve. Prevalent hardeninglaws are proposed by Swift (1952) or Hockett and Sherby (1975) and lead to an expansion of theyield surface in the stress space. By reasons of good accordance in an earlier survey the givenmaterials are modeled by the yield criterion Yld2000-2d and the isotropic hardening law of Swift.In this case the yield loci at different experimental states of plastification are compared with theyield loci given from the isotropic expansion of the Yld2000-2d yield surface. Furthermore apossible approach for modelling the change of the yield criterion’s shape in the stress space duringplastification is shown. With respect to further investigations additional research work is neededincluding extended and complex hardening laws to describe the real material behaviour sufficiently.

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Advanced Materials Research (Volume 769)

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197-204

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https://doi.org/10.4028/www.scientific.net/AMR.769.197

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Online since:

September 2013

Authors:

Sebastian Suttner, Andreas Kuppert

Keywords:

Material Characterisation, Metal Forming, Modeling

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