Abstract
The formability of Al‐Mg sheet can be improved considerably, by increasing the temperature. By heating the sheet in areas with large shear strains, but cooling it on places where the risk of necking is high, the limiting drawing ratio can be increased to values above 2.5. At elevated temperatures, the mechanical response of the material becomes strain rate dependent. To accurately simulate warm forming of aluminium sheet, a material model is required that incorporates the temperature and strain‐rate dependency. In this paper simulations are presented of the deep drawing of a cylindrical cup, using shell elements. It is demonstrated that the familiar quadratic Hill yield function is not capable of describing the plastic deformation of aluminium. Hardening can be described successfully with a physically based material model for temperatures up to 200 °C. At higher temperatures and very low strain rates, the flow curve deviates significantly from the model.
Original language | English |
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Title of host publication | Materials processing and design : modeling, simulation and applications |
Subtitle of host publication | NUMIFORM 2004 : proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes |
Editors | Somnath Ghosh, Jose M. Castro, June K. Lee |
Place of Publication | Melville, NY |
Publisher | American Institute of Physics |
Pages | 893-898 |
ISBN (Electronic) | 0-7354-0189-6 |
ISBN (Print) | 0-7354-0188-8 |
DOIs | |
Publication status | Published - 13 Jun 2004 |
Event | 8th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2004 - Columbus, United States Duration: 13 Jun 2004 → 17 Jun 2004 Conference number: 8 |
Publication series
Name | AIP Conference Proceedings |
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Publisher | AIP |
Volume | 712 |
ISSN (Print) | 0094-243X |
Conference
Conference | 8th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2004 |
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Abbreviated title | NUMIFORM |
Country | United States |
City | Columbus |
Period | 13/06/04 → 17/06/04 |