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Prediction of six or eight ears in a drawn cup based on a new anisotropic yield function
journal contribution
posted on 2006-01-01, 00:00 authored by Jeong YoonJeong Yoon, F Barlat, R E Dick, M E KarabinIn this work, the recently proposed anisotropic yield function, Yld2004-18p [Barlat, F., Aretz, H., Yoon, J.W., Karabin, M.E., Brem, J.C., Dick, R.E., 2005. Linear transformation based anisotropic yield function, Int. J. Plasticity 21, 1009], is implemented in a finite element (FE) code for application to the cup drawing simulation of a circular blank sheet. A short review of the Yld2004-18p relevant features is provided and the stress integration scheme for its implementation in FE codes is described. The simulation of the drawing process is conducted for an aluminum alloy sheet sample (AA2090-T3). The predicted and experimental cup height profiles (earing profiles) with six ears are shown to be in excellent agreement. Additional simulations on a ficticious material are performed in order to show that the yield function Yld2004-18p can lead to the prediction of cups with eight ears. In order to achieve these results, a sufficient number of input data are required to calculate the yield function coefficients. Finally, a simplified analytical approach that relates the earing profile to the r-value directionality is also presented in this paper. It is shown that this approach can be very useful as a first approximation of the earing profile of drawn cups.
History
Journal
International journal of plasticityVolume
22Issue
1Pagination
174 - 193Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0749-6419Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2005, ElsevierUsage metrics
Keywords
Yield functionAnisotropyEaringFinite element methodAluminum alloySheet formingScience & TechnologyTechnologyEngineering, MechanicalMaterials Science, MultidisciplinaryMechanicsEngineeringMaterials ScienceKINEMATIC HARDENING LAWSSPRING-BACK EVALUATIONFINITE-ELEMENT-METHODINCREMENTAL DEFORMATION-THEORYALUMINUM-ALLOY SHEETSPARTFORMULATIONSIMULATIONPOTENTIALSMETALSMechanical Engineering
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