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Lubricants 2018, 6(2), 42; https://doi.org/10.3390/lubricants6020042

Development of a Constitutive Model for Friction in Bulk Metal Forming

1
Institute for Computational Engineering, University of Applied Sciences NTB Buchs, Werdenbergstrasse 4, 9471 Buchs SG, Switzerland
2
Institute of Materials Engineering, TU Dortmund University, Leonhard-Euler-Strasse 2, 44227 Dortmund, Germany
3
V-Research GmbH, Stadtstrasse 33, 6850 Dornbirn, Austria
4
Jansen AG Steel Tubes, Industriestrasse 34, 9463 Oberriet, Switzerland
*
Author to whom correspondence should be addressed.
Received: 13 March 2018 / Revised: 25 April 2018 / Accepted: 25 April 2018 / Published: 28 April 2018
(This article belongs to the Special Issue Tribology in Metal Forming)
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Abstract

This paper presents a systematic procedure for the development of a constitutive model of friction with focus on the application in bulk metal forming simulations. The empirically based friction model describes friction as a function of sliding distance and the most relevant friction influencing parameters. The latter were determined by means of designed experiments. An optimal friction model is obtained as a trade-off between model accuracy and complexity by using stepwise nonlinear regression and a modified version of the Akaike information criterion. Within this study, the procedure is applied to determine a friction model for tube drawing. However, the same approach can also be used for modeling friction of any other bulk metal forming process. View Full-Text
Keywords: Friction; bulk metal forming; mathematical modeling; design of experiments; stepwise regression; Akaike information criterion Friction; bulk metal forming; mathematical modeling; design of experiments; stepwise regression; Akaike information criterion
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Lüchinger, M.; Velkavrh, I.; Kern, K.; Baumgartner, M.; Klien, S.; Diem, A.; Schreiner, M.; Tillmann, W. Development of a Constitutive Model for Friction in Bulk Metal Forming. Lubricants 2018, 6, 42.

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