| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 11007955 | Comptes Rendus Mécanique | 2018 | 15 Pages |
Abstract
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 1000Câ. 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 rate-independent 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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Engineering (General)
Authors
Nicolas Häberle, Andreas Pittner, Rainer Falkenberg, Ole Kahlcke, Michael Rethmeier,