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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Huetink, Han
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Topics
Publications (13/13 displayed)
- 2012Free Surface Modeling of Contacting Solid Metal Flows Employing the ALE formulationcitations
- 2010Effect of Thickness Stress in Stretch-Bending
- 2007Deterministic and robust optimisation strategies for metal forming proceesses
- 2007A metamodel based optimisation algorithm for metal forming processescitations
- 2006Simulation of thermo-mechanical aluminium sheet formming
- 2006Large deformation simulation of anisotropic material
- 2006A comparison between optimisation algorithms for metal forming processes
- 2006Non-proportional tension-shear experiments in a biaxial test facility
- 2006Simulation of aluminium sheet forming at elevated temperaturescitations
- 2004Modelling of aluminium sheet material at elevated temperatures
- 2003Prediction of sheet necking with shell finite element models
- 2000Improvements in FE-analysis of real-life sheet metal forming
- 2000Anisotropic yield functions in a co-rotating reference frame
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article
Simulation of aluminium sheet forming at elevated temperatures
Abstract
The formability of aluminium sheet can be improved by increasing the temperature in some parts of the sheet and cooling other parts. Simulation of this process requires an accurate material model for the yield function and the temperature and strain-rate dependent hardening. In simulations of cylindrical cup deep drawing, the quadratic Hill yield criterion results in too much thinning in the bottom of the cup. The Vegter yield function is more flexible and gives better predictions. The model for work hardening and the temperature and strain-rate sensitivity needs to be accurate over the complete temperature range between the cooled and the heated parts of the sheet. It is demonstrated that the Bergström model is able to model the flow stress of Al–Mg alloys up to 200 °C and medium strain rates. For higher temperatures and low strain rates the deviations with experiments increase.