A numerical scheme of convex yield function with continuous anisotropic hardening based on non-associated flow rule in FE analysis of sheet metal

Wencheng Liu, Bernard K Chen

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A non-associated flow rule (NAFR) model is developed by adopting the convex function YLD-2004 as the yield stress function and the plastic potential function. The yield stress function coefficients are continuously updated which are associated with the change of directional uniaxial yield stress and biaxial yield stress to simulate the anisotropic hardening behaviour. That was achieved by implementing the numerical identification procedure of coefficients into stress integration procedure. The coefficients of plastic potential function are constant and identified by the uniaxial and biaxial r-value. This constitutive model is capable of describing anisotropic hardening and yield behaviour of strongly textured aluminium alloy sheet metal. In this paper, the model was implemented into the FE code via ABAQUS subroutine to predict the deep drawn cup earing and directional flow stresses of the AA5042-H2 aluminium alloy. The new anisotropic hardening model shows better agreement with experiments compared with the isotropic hardening model.
Original languageEnglish
Title of host publicationJournal of Physics
Subtitle of host publicationConference Series
EditorsToshihiko Kuwabara, Takayuki Hama, Mitsutoshi Kuroda, Susumu Takahashi, Akinori Yamanaka
Place of PublicationBristol UK
PublisherIOP Publishing
Number of pages7
Publication statusPublished - 2018
EventInternational Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes 2018 - Hotel East 21 Tokyo, Tokyo, Japan
Duration: 30 Jul 20183 Aug 2018
Conference number: 11th

Publication series

NameJournal of Physics: Conference Series
PublisherInstitute of Physics Publishing Ltd.
ISSN (Print)1742-6588
ISSN (Electronic)1742-6596


ConferenceInternational Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes 2018
Abbreviated titleNUMISHEET 2018
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