TU Darmstadt / ULB / TUbiblio

Modeling of the material behavior during hot hydroforming

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

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.

Item Type: Article
Erschienen: 2011
Creators: Elsenheimer, Dirk and Taplick, Christoph and Groche, Peter
Title: Modeling of the material behavior during hot hydroforming
Language: English
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.

Journal or Publication Title: Materialwissenschaft und Werkstofftechnik, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume: 42
Number: 8
Uncontrolled Keywords: hot hydro forming, material properties, constitutive law, hot tube bulge test
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institut für Produktionstechnik und Umformmaschinen (PtU)
Date Deposited: 12 Sep 2012 14:49
Export:

Optionen (nur für Redakteure)

View Item View Item