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  4. Influence of different strain rates on the flow curve and the formability of thin aluminium and tinplate sheets
 
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2016
Conference Paper
Title

Influence of different strain rates on the flow curve and the formability of thin aluminium and tinplate sheets

Other Title
Einfluss der Dehnrate auf die Fließkurve und das Umformvermögen von dünnen Aluminium- und Weißblechen
Abstract
Due to the high number of produced units and the very thin sheet metals used for beverage cans, precise production processes with high production volumes are necessary. To save expenses, while optimising these processes, numerical simulation methods are exploited. Considering this, it is indispensable to identify the material behaviour as exactly as possible. In practise, often results of quasi static tensile tests are used, although these are insufficient for the precise modelling of the material behaviour during can production, since strain rates of up to 10³ s-1 can occur, here. Therefore, quasi static and high speed tensile test have been done on specimens featuring the typical materials and thicknesses of semi-finished parts used for beverage can production. The results were compared with similar materials at higher sheet metal thicknesses and authenticated by numerical simulation. It was shown that there is an influence of the strain rate on the material behaviour and it is necessary to determine material characteristics at strain rates, which are close to the process speed. Furthermore, the results were classified in their signification for beverage can production and forming technologies in general.
Author(s)
Linnemann, Maik  
Lieber,Thomas
Scheffler, Christian  
Psyk, Verena  
Müller, Roland  
Landgrebe, Dirk
Mainwork
7th International Conference on High Speed Forming, ICHSF 2016. Proceedings  
Conference
International Conference on High Speed Forming (ICHSF) 2016  
Language
English
Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik IWU  
Keyword(s)
  • material

  • can manufacturing

  • high speed tensile test

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