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  • Kahlcke, Ole (1) (entfernen)

Schlagworte

  • Grade S960QL steel (1)
  • Material modeling (1)
  • Residual stress (1)
  • Viscoplasticity (1)

Organisationseinheit der BAM

  • 5 Werkstofftechnik (1)
  • 5.2 Experimentelle und modellbasierte Werkstoffmechanik (1)
  • 9 Komponentensicherheit (1)
  • 9.3 Schweißtechnische Fertigungsverfahren (1)

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Application of multi-phase viscoplastic material modelling to computational welding mechanics of grade-s960ql steel (2018)
Häberle, Nicolas ; Pittner, Andreas ; Rethmeier, Michael ; Falkenberg, Rainer ; Kahlcke, Ole
The sound numerical prediction of welding-induced thermal stresses, residual stresses, and distortions strongly depends on the accurate description of a welded material’s thermomechanical deformation behaviour. In this work, we provide experimental data on the viscoplastic deformation behaviour of a grade-s960ql steel up to a temperature of 1000 ◦C. In addition, a multi-phase viscoplastic material model is proposed, which accounts for the experimentally observed isothermal deformation behaviour of grade-s960ql steel base and austenitised material, as well as for athermal contributions that originate from solid-state phase transformations. The multi-phase viscoplastic and a classic rateindependent isotropic hardening material model were applied in the numerical simulations of both-ends-fixed bar Satoh tests and a single-pass gas metal arc weld. The influence of material modelling choices on the agreement between numerical simulation and experimental results is discussed, and recommendations for further work are given.
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