Title: Identification of rheological models and boundary conditions in metal forming

Authors: Danuta Szeliga, Maciej Pietrzyk

Addresses: Faculty of Metals Engineering and Industrial Computer Science, Department of Modelling and Information Technology, Akademia Gorniczo Hutnicza, Al. Mickiewicza 30, 30-059 Krakow, Poland. ' Faculty of Metals Engineering and Industrial Computer Science, Department of Modelling and Information Technology, Akademia Gorniczo Hutnicza, Al. Mickiewicza 30, 30-059 Krakow, Poland

Abstract: Identification of rheological models and boundary conditions in metal forming is performed. Various rheological models, from classical closed-form equations to advanced multiscale models, are investigated. Capabilities and limitations of models are discussed. Inverse method is applied to identification of the models on the basis of plastometric tests. Ability of this technique to eliminate the effect of inhomogeneity of deformation is demonstrated. Importance of rheological parameters is evaluated using parameter sensitivity analysis. Finally, sensitivity of the inverse approach with respect to assumptions is performed and accuracy of this approach is evaluated. Good practice guide for identification of rheological model is proposed.

Keywords: metal forming; rheological modelling; boundary conditions; inverse analysis; sensitivity analysis; rheology; deformation.

DOI: 10.1504/IJMPT.2010.035845

International Journal of Materials and Product Technology, 2010 Vol.39 No.3/4, pp.388 - 405

Received: 18 Nov 2007
Accepted: 10 Feb 2009
Published online: 05 Oct 2010 *

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