Practical determination of friction coefficient of Al 3003 for forming of backward extruded part using simple tip test and inverse finite element analysis

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The friction coefficient for aluminum alloy 3003 was determined from a specially designed tip test and finite element (FE) simulations. Measured radial tip distance after the tip test was compared to the FE simulations by iteratively changing friction coefficient and the best fitting friction coefficient was determined. To consider strain rate effect on flow stress response during large plastic deformation, a new combined Hollomon-Voce hardening law was proposed. The friction under three different surface conditions was considered by the proposed inverse FE analysis. The results showed that there was obvious strain rate effect on the predicted punch load in the tip test. Moreover, the different friction coefficients were numerically determined for punch/workpiece and die/workpiece interfaces. Two possible causes of this difference were discussed by the analysis on contact normal pressure and slip velocity distributions of the two interfaces
Publisher
KOREAN INST METALS MATERIALS
Issue Date
2016-05
Language
English
Article Type
Article
Citation

METALS AND MATERIALS INTERNATIONAL, v.22, no.3, pp.356 - 363

ISSN
1598-9623
DOI
10.1007/s12540-015-5158-3
URI
http://hdl.handle.net/10203/209305
Appears in Collection
ME-Journal Papers(저널논문)
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