A procedure for the evaluation of flow stress of sheet metal by hydraulic bulge test using elliptical dies
Lucian Lazarescu, Ioan Pavel Nicodim, Dan-Sorin Comsa, Dorel Banabic
(M. Merklein & H. Hagenah, Eds.) MATERIAL FORMING - ESAFORM 2012, PTS 1 & 2. LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND: TRANS TECH PUBLICATIONS LTD (2012) .
MMerkleinHHagenah2012TRANS TECH PUBLICATIONS LTD
Full text: http://dx.doi.org/10.4028/www.scientific.net/KEM.504-506.107
Abstract
The paper describes a new experimental procedure for the determination of the curves relating the equivalent stress and equivalent strain of sheet metals by means of the hydraulic bulge tests through elliptical dies. The procedure is based on an analytical model of the bulging process and involves the measurement of only two parameters (pressure acting on the surface of the specimen and polar deflection).
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