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Modeling of the material behavior during hot hydroforming

Elsenheimer, Dirk ; Taplick, Christoph ; Groche, Peter :
Modeling of the material behavior during hot hydroforming.
In: Materialwissenschaft und Werkstofftechnik, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 42 (8) pp. 697-704.
[Artikel], (2011)

Kurzbeschreibung (Abstract)

For the purpose of numerically simulating metal forming processes, material data are necessary, determined by testing procedures similar to the particular process. The new technology of hot tube bulge tests has been introduced recently, fulfilling the requirements of material data determination for hot hydroforming. Based on measurement data gained by this technology, selected constitutive relations for approximating the flow stress depending on temperature, strain rate and logarithmic strain were parameterized applying linear regression analysis. Using the material law with the best approximation quality among the regarded equations, a numerical simulation of an exemplary forming process was accomplished. A comparison between the experimentally obtained geometry after a hot hydroforming process and the prediction by numerical analysis is used for evaluating the quality and applicability of the determined material data for this kind of process. Additionally, a process simulation, using extrapolated material data from compression tests is presented to visualize the influence of the testing procedure on the resulting part geometry prediction.

Typ des Eintrags: Artikel
Erschienen: 2011
Autor(en): Elsenheimer, Dirk ; Taplick, Christoph ; Groche, Peter
Titel: Modeling of the material behavior during hot hydroforming
Sprache: Englisch
Kurzbeschreibung (Abstract):

For the purpose of numerically simulating metal forming processes, material data are necessary, determined by testing procedures similar to the particular process. The new technology of hot tube bulge tests has been introduced recently, fulfilling the requirements of material data determination for hot hydroforming. Based on measurement data gained by this technology, selected constitutive relations for approximating the flow stress depending on temperature, strain rate and logarithmic strain were parameterized applying linear regression analysis. Using the material law with the best approximation quality among the regarded equations, a numerical simulation of an exemplary forming process was accomplished. A comparison between the experimentally obtained geometry after a hot hydroforming process and the prediction by numerical analysis is used for evaluating the quality and applicability of the determined material data for this kind of process. Additionally, a process simulation, using extrapolated material data from compression tests is presented to visualize the influence of the testing procedure on the resulting part geometry prediction.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Materialwissenschaft und Werkstofftechnik, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Band: 42
(Heft-)Nummer: 8
Freie Schlagworte: hot hydro forming, material properties, constitutive law, hot tube bulge test
Fachbereich(e)/-gebiet(e): Fachbereich Maschinenbau
Fachbereich Maschinenbau > Produktionstechnik und Umformmaschinen
Hinterlegungsdatum: 12 Sep 2012 14:49
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