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A Numerical Investigation of the Hole Expansion Test

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The flanging operation is one of the sheet metal forming processes common in the automotive industry. In the flanging operation, a pierced hole is expanded and a crack often initiates at the hole edge. To investigate the stretch-flangeability of a sheet metal, the hole expansion test is usually conducted. Although the strain state is close to the uniaxial tension at the hole edge, a large tensile strain is achieved before fracture in the hole expansion test compared to the uniaxial tension. In this work, the reason for such a large strain is analyzed using the finite element simulations. The deformation and strain distribution of the hole expansion test are compared with the specially devised hole expansion tests with slits.
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Document Type: Research Article

Publication date: 2012-07-01

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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