Title: About the sheet metal testing by hydraulic bulging

Authors: Valentin Gagov, Boris Tomov, Rossen Radev, Emil Yankov

Addresses: Faculty of Manufacturing Engineering, University of Rousse, 8 Studentska St., 7017 Rousse, Bulgaria. ' Faculty of Manufacturing Engineering, University of Rousse, 8 Studentska St., 7017 Rousse, Bulgaria. ' Faculty of Manufacturing Engineering, University of Rousse, 8 Studentska St., 7017 Rousse, Bulgaria. ' Faculty of Manufacturing Engineering, University of Rousse, 8 Studentska St., 7017 Rousse, Bulgaria

Abstract: At the present time a number of experimental methods are widely used for both qualitative and quantitative estimation of the sheet metal behaviour under processing by forming. There exist some special features of sheet metal deformation and, therefore, it is not possible yet to apply one and only testing procedure for all types of forming operations. The paper gives a brief description of the bulge testing of planar isotropic sheet metals and also presents some preliminary results about the applicability of this method for work hardening curves evaluation using data for specimen areas out of pole and for strength estimation under hydrostatic or hydrodynamic loading.

Keywords: hydraulic bulging; flow curves; static properties; dynamic properties; sheet metal testing; sheet metal forming; deformation; work hardening curves; strength estimation; hydrostatic loading; hydrodynamic loading.

DOI: 10.1504/IJMMP.2009.031597

International Journal of Microstructure and Materials Properties, 2009 Vol.4 No.5/6, pp.640 - 648

Published online: 12 Feb 2010 *

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