Identification of material parameters for springback prediction using cyclic tension–compression test
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Author list: Phongsai T., Julsri W., Chongthairungruang B., Suranuntchai S., Jirathearanat S., Uthaisangsuk V.
Publisher: Prince of Songkla University
Publication year: 2016
Journal: Songklanakarin Journal of Science and Technology (SJST) (0125-3395)
Volume number: 38
Issue number: 5
Start page: 485
End page: 493
Number of pages: 9
ISSN: 0125-3395
Languages: English-Great Britain (EN-GB)
Abstract
In sheet metal forming process, springback is a critical problem for die makers, particularly in case of advanced high strength steels. Therefore, FE simulations were often used to calculate materials deformation behavior and the springback occurrence of formed sheet metals. Recently, the Yoshida–Uemori model, a kinematic hardening model, has shown great capability for describing the elastic recovery of a material. Nevertheless, determination of model parameters is sophisticated for industrial applications. In this work, an AHS steel grade JIS JSC780Y was investigated, in which tension–compression tests were carried out and the procedure of parameter identification was analyzed. Different fitting methods were examined and verified by evaluation of cyclic stress–strain responses obtained from simulations of 1–element model and experiments. The most appropriate parameter set was determined. Finally, hat shape forming test was performed and springback obtained by calculation and experiment was compared. It was found that the introduced procedure could be acceptably applied. © 2016, Prince of Songkla University. All rights reserved.
Keywords
Material parameters
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