Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 22    No. 2    December 2012

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Characterization of plastic behaviour of sheet metals by hydraulic bulge test
Lucian LĂZĂRESCU, Dan-sorin COMŞA, Ioan NICODIM, Ioan CIOBANU, Dorel BANABIC

CERTETA Research Centre, Technical University of Cluj-Napoca, Cluj-Napoca, Romania

Abstract:In the hydraulic bulge tests, dies with both circular and elliptical apertures were used. A recently proposed methodology was used to determine the equivalent stress-strain curves by bulging through elliptical dies. This methodology combines an analytical approach with the experimental data measured by an ARAMIS system. In the hydraulic bulge test using elliptical dies, as the die ellipticity ratio decreases, the equivalent stress-strain curves tend to move away from the curve obtained from bulging through circular die. The forming limit diagram in the range of positive minor strain of a DC04 sheet steel is also determined by using bulge test.

 

Key words: hydraulic bulge test; stress-strain curves; forming limit diagram

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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