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  4. Local residual stress analysis on deep drawn cups by means of the incremental hole-drilling method
 
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2017
Conference Paper
Titel

Local residual stress analysis on deep drawn cups by means of the incremental hole-drilling method

Abstract
In addition to residual stresses sheet metal forming induces characteristic crystallographic texture, hence, the material behavior is anisotropic. In general, the standard evaluation procedures of residual stress analysis techniques are limited to isotropic material states. In the present paper deep drawn steel cups of dual phase steel DP600 are analyzed by using a recently proposed calibration approach for residual stress analysis by means of the incremental hole-drilling method for highly textured material states. It is based on the differential method, which is enhanced with four case specific calibration functions. The multiple case specific calibration functions are determined by means of finite element simulations using the orientation distribution function (ODF) in combination with Hills assumption and single crystal elastic constants of iron to calculate the effective elasticity tensor to account for elastic anisotropy. Supplementary, the deep drawing process is simulated using a finite element model based on the Hill48 yield criterion. Finally, the comparison shows that the numerical results are in satisfactory agreement to the experimental data.
Author(s)
Schuster, S.
Karlsruhe Institute of Technology (KIT)
Pagenkopf, J.
Fraunhofer-Institut für Werkstoffmechanik IWM
Gibmeier, J.
Karlsruhe Institute of Technology (KIT)
Hauptwerk
10th International Conference on Residual Stresses, ICRS 2016
Konferenz
International Conference on Residual Stresses (ICRS) 2016
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DOI
10.21741/9781945291173-32
Externer Link
Externer Link
Language
English
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Fraunhofer-Institut für Werkstoffmechanik IWM
Tags
  • incremental hole-dril...

  • crystallographic text...

  • multiple case-specifi...

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