Analysis of forming limits using the Hill 1993 yield criterion
Article Abstract:
Research was conducted to examine the forming limits of thin sheets using a yield criterion developed by Hill. This criterion describes the material attributes of sheet metals using five independent material diameters while localized necking is predicted using bifurcation analysis. Test results indicated that limit strains were significantly affected by the yield locus. Techniques for improving the formability of a sheet metal were also discovered.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1998
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Effects of some modeling parameters of finite element models of binder forming
Article Abstract:
A two-dimensional stepdie that simulates binder forming is used in DYNA3D model to study the effect of die close speed, die gap, mass damping and width of blank, on the accuracy of finite element simulation in sheet-metal forming. Slow simulation speed may generate inaccurate results while high speed can give dynamic effects.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 2001
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A unified bifurcation analysis of sheet metal forming limits
Article Abstract:
The orientations of localized necks occurring in sheet metal forming processes are analytically determined and the corresponding forming limit diagrams (FLDs) are obtained. A case study, which uses the von Mises yield criterion, is presented.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 2001
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