File(s) under permanent embargo
A springback prediction of 1.5 GPa grade steel in roll forming process for automotive sill-side inner component
conference contribution
posted on 2019-01-01, 00:00 authored by H Choi, Jeong YoonJeong Yoon, J Lee, G Kim© 2019 Trans Tech Publications Ltd, Switzerland. Roll forming has been widely used to produce steel sheet with low formability such as Ultra High Strength Steel (UHSS). It allows the steel sheet to be formed through successive bending process into a desired shape which even cannot be formed by press brake forming. Although the process effectively improves the formability of UHSS, there still the remains accuracy issue such as springback, flair, bow and so on. Especially, springback of UHSS is one of the major challenges in roll forming process as much as press forming process. In this paper, the springback of 1.5 GPa grade steel in roll forming process was numerically investigated for automotive sill-side inner component. The material behavior was described by using the selected hardening models: isotropic hardening (Piecewise linear model), linear kinematic hardening (Prager model [6]), nonlinear kinematic hardening model (Yoshida-Uemori model [7]). A commercial software LS-DYNA was utilized for the analysis. Eighteen successive roll stages were modelled for the simulation. From the results, it was found that the springback prediction during roll forming process could be successfully achieved when the complicated material behaviors including Bauschinger effect, nonlinear transient hardening, and changeable unloading modulus are taken into account for the Finite Element (FE) simulation.
History
Event
Engineering Plasticity and its Applications. Symposium (14th : 2018 : Jeju Island, Korea)Volume
794Pagination
267 - 274Publisher
Trans Tech PublicationsLocation
Jeju Island, KoreaPlace of publication
Zurich, SwitzerlandStart date
2018-12-02End date
2018-12-07ISSN
1013-9826ISBN-13
9783035713626Language
engPublication classification
E1 Full written paper - refereedCopyright notice
2019, Trans Tech Publications Ltd, SwitzerlandTitle of proceedings
Key Engineering Materials : 14th Asia-Pacific Symposium on Engineering Plasticity and its ApplicationsUsage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC