Application of multi-phase viscoplastic material modelling to computational welding mechanics of grade-s960ql steel
| Autor: | Michael Rethmeier, Nicolas Häberle, Rainer Falkenberg, Ole Kahlcke, Andreas Pittner |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Marketing Work (thermodynamics) Materials science Viscoplasticity Computer simulation Strategy and Management 02 engineering and technology Welding Mechanics Deformation (meteorology) 021001 nanoscience & nanotechnology 01 natural sciences Isothermal process law.invention law Residual stress 0103 physical sciences Media Technology General Materials Science Arc welding 0210 nano-technology |
| Zdroj: | Comptes Rendus Mécanique. 346:1018-1032 |
| ISSN: | 1631-0721 |
| DOI: | 10.1016/j.crme.2018.08.001 |
| Popis: | 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- s 960 ql 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- s 960 ql 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. |
| Databáze: | OpenAIRE |
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