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Study on yield function and plastic potential under non-associated flow for accurate earing prediction in cup drawing

Paulino, Mariana and Yoon, Jeong Whan 2015, Study on yield function and plastic potential under non-associated flow for accurate earing prediction in cup drawing, Steel research international, vol. 86, no. 8, pp. 852-860, doi: 10.1002/srin.201400566.

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Title Study on yield function and plastic potential under non-associated flow for accurate earing prediction in cup drawing
Author(s) Paulino, MarianaORCID iD for Paulino, Mariana orcid.org/0000-0001-5474-9138
Yoon, Jeong WhanORCID iD for Yoon, Jeong Whan orcid.org/0000-0002-7616-5253
Journal name Steel research international
Volume number 86
Issue number 8
Start page 852
End page 860
Total pages 9
Publisher Wiley
Place of publication London, Eng.
Publication date 2015-08
ISSN 1611-3683
Keyword(s) Non-associated flow rule
Finite element analysis
Anisotropy
Earin
Summary Prediction of more than four ears in a cup drawing process can be successfully achieved by considering r-value and stress directionalities. Yld2004-18p based on associated flow rule and Yld2000-2D based on non-associated flow rule are the examples. The former, however, is more costly in terms of computational efficiency than the latter. In this work, an anisotropic constitutive model based on non-associated flow rule which combines two different functions, Hill (1948) and Yld2000-2d, is implemented to a user defined material model. The accuracy of the anisotropic directionalities (yield stresses and plastic strain ratios) is evaluated. Simulation of a mini-die cup drawing with a body stock alloy predicted eight ears, in good agreement with the experimental results. The use of Hill (1948) model for the yield function and Yld2000-2d for plastic potential under the framework of non-associated flow rule led to accurate prediction of up to eight ears at the lower computational cost.
Language eng
DOI 10.1002/srin.201400566
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861199 Basic Metal Products (incl. Smelting
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Wiley
Persistent URL http://hdl.handle.net/10536/DRO/DU:30077800

Document type: Journal Article
Collection: School of Engineering
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