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The Improvement of Formability using the Polar-coordinate FLD with Strain Path Independence
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  • Journal title : Transactions of Materials Processing
  • Volume 24, Issue 5,  2015, pp.348-353
  • Publisher : The Korean Society for Technology of Plasticity
  • DOI : 10.5228/KSTP.24.5.348
 Title & Authors
The Improvement of Formability using the Polar-coordinate FLD with Strain Path Independence
Bae, M.K.; Hong, S.H.; Choi, K.Y.; Yoon, J.W.; Kim, Y.S.;
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 Abstract
The PEPS(Polar-coordinated Effective Plastic Strain) FLD(Forming Limit Diagram), a new type of FLD based on a polar representation of the EPS(Effective Plastic Strain), appears to be an effective solution to the problem of non-linear strain path effects. This method has the advantages of the familiar strain-based diagram for linear loading, but without the strain-hardening limitations of the stress-based diagram, or non-intuitive aspects of alternate Cartesian diagrams based on effective plastic strain. In the current study, the PEPS FLD was applied to the development process of an aluminum automobile-body panel, including the necking or crack prediction, die design, and die modification. As a result, the PEPS FLD provided improved formability of aluminum sheet as compared to deriving the potential formability with non-linearity.
 Keywords
FLD;FLC;Non-linear FLD;Stress-based FLD;Polar-EPS FLD;Aluminum Sheet;Automobile-body Panel;
 Language
Korean
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