Abstract
The formability of aluminum sheet depends on the temperature of the material and the strain
rate. E.g. the limiting drawing ratio can be improved by increasing the temperature uniformly, but even more by
heating the flange and cooling the punch. To accurately simulate the deep drawing or stretching of aluminum
sheet at elevated temperatures, 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 axi-symmetric
elements. Two material models are compared. First a phenomenological material model is used, in which
the parameters of a Ludwik–Nadai hardening curve are made temperature and strain-rate dependent. Then a
physically-based model, according to Bergstr¨om is used. The model incorporates the influence of the temperature
on the flow stress and on the hardening rate and includes dynamic recovery aspects
| Original language | English |
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| Number of pages | 6 |
| Publication status | Published - 2001 |
| Event | 7th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2001 - Toyohashi, Japan, Toyohashi, Japan Duration: 18 Jun 2001 → 20 Jun 2001 Conference number: 7 |
Conference
| Conference | 7th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2001 |
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| Abbreviated title | NUMIFORM |
| Country/Territory | Japan |
| City | Toyohashi |
| Period | 18/06/01 → 20/06/01 |
| Other | 18-20 June 2001 |