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Systematische, erweiterte Kennwertermittlung

: Neugebauer, Reimund; Putz, M.; Heidl, W.; Michael, D.; Neubauer, W.

Fulltext urn:nbn:de:0011-n-521044 (368 KByte PDF)
MD5 Fingerprint: b5a599b7e4c1c2ded255ec2d7474fe10
Created on: 8.4.2011

Neugebauer, Reimund ; Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik -IWU-, Chemnitz:
2nd International Conference on Accuracy in Forming Technology, ICAFT 2006 und 13. Sächsische Fachtagung Umformtechnik, SFU 2006. Proceedings : 13.-15. November 2006 Stadthalle Chemnitz
Zwickau: Verlag Wissenschaftliche Scripten, 2006 (Berichte aus dem IWU 36)
ISBN: 3-937524-45-2
International Conference on Accuracy in Forming Technology (ICAFT) <2, 2006, Chemnitz>
Sächsische Fachtagung Umformtechnik (SFU) <13, 2006, Chemnitz>
Conference Paper, Electronic Publication
Fraunhofer IWU ()
material testing; maxi-bulge-test; tension-compression-test for sheet; flow curve; yield surface; biaxial-tension-test; identification of material parameter; material model

Beside the conventional tensile tests, new material testing techniques as the Maxi-Bulge-Test and the tension-compression test for sheet metals provide precise data and parameters with respect to the material behavior in the case of yield initiation, beside the region of uniform elongation and in dependency of the anisotropy of the material. The shape of the yield surface and its evolution during the forming process has a significant influence on the quality of the forming results, so the utilization of the biaxial-tension-test is in the end indispensable. The identification of the material parameters is an inverse problem, which can be approximated by a nonlinear optimization problem, which provides the best as possible accommodation of the computed global or local data to the measured data. So the foundation for a more precise process optimization and technological development are established.