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Predictions of forming limit diagrams using a rate-dependent polycrystal self-consistent plasticity model
- Source :
-
International Journal of Plasticity . Jan2009, Vol. 25 Issue 1, p1-25. 25p. - Publication Year :
- 2009
-
Abstract
- Abstract: In the sheet-metal forming industry, forming-limit strains have been a useful tool for quantifying metals formability. However, the experimental measurement of these strains is a difficult, time consuming and expensive process. It would be useful if strains calculated with a theoretical model could replace many of the experimental measurements. In this research, we analyze forming-limit strains of metals using a rate-dependent plasticity, polycrystal, self-consistent (VPSC) model in conjunction with the Marciniak–Kuczynski (M–K) approach. Previous researchers have studied forming limit diagrams (FLDs) based on the full-constraints Taylor model. This is the first time, to the authors’ knowledge, that the self-consistent approach has been introduced to simulate the polycrystal FLD behavior. Numerous microstructural factors characterizing the material have a strong influence on the FLD, so our model includes the effects of slip hardening, strain-rate sensitivity, anisotropy and initial texture. Finally, the calculation of the FLD with a more realistic scale transition successfully predicts some of the experimental tendencies that the Taylor model cannot reproduce for aluminum alloys AA6116-T4 and AA5182-O. [Copyright &y& Elsevier]
- Subjects :
- *GRAPHIC methods
*BUSINESS records
*GEOMETRICAL drawing
*LEAST squares
Subjects
Details
- Language :
- English
- ISSN :
- 07496419
- Volume :
- 25
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- International Journal of Plasticity
- Publication Type :
- Academic Journal
- Accession number :
- 34439006
- Full Text :
- https://doi.org/10.1016/j.ijplas.2008.01.005