Characterization of plastic behaviour of sheet metals by hydraulic bulge test

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• 作者：Lucian L?Z?RESCU ; Dan-Sorin COM?A ; Ioan NICODIM ; Ioan CIOBANU ; Dorel BANABIC ; ^{banabic@tcm.utcluj.ro}
• 关键词：hydraulic bulge test ; stress&mdash ; strain curves ; forming limit diagram
• 刊名：Transactions of Nonferrous Metals Society of China
• 出版年：2012
• 出版时间：December, 2012
• 年：2012
• 卷：22
• 期：supp_S2
• 页码：s275-s279
• 全文大小：1201 K

文摘

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¡ªstrain 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¡ªstrain 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.