Stamping of advanced high strength steel sheets with Bauschinger effect considered
Journal
Advanced Science Letters
Journal Volume
9
Pages
8-15
Date Issued
2012
Author(s)
Abstract
The prediction of spring back by the finite element method, when stamping the advanced high strength steel sheet DP590Y, with the Bauschinger effect considered was examined in the present study. Except probing into the difference of the Bauschinger effect exhibited between 270 single phase steel and DP590Y dual phase steel, the stamping of a vehicle door beam was also analyzed by the finite element simulation with different yield criteria and work hardening rules applied. The tension-compression tests were conducted and the Yoshida-Uemori model (Y-U model) was fitted by the experimental data for the finite element simulations employed in the present study. The actual stamping of a vehicle door beam was also implemented in the present study to validate the finite element simulation results. The deformation mechanics of fundamental bending of sheet metals was investigated and the results indicate that the simulations of sheet metal experiencing the tension and compression deformation during the stamping process need to include the Bauschinger effect to render a more accurate prediction in spring back. The finite element analysis also reveals that the DP590Y steel exhibits more significant Bauschinger effect that the 270 conventional steel does. From both the simulation results and the experimental data, it is found as long as the sheet metal under the deforming mechanism of cyclic tension and compression loading, the accuracy of spring back in prediction by the finite element simulation turns out to have great increase in effect when selected material model with the Bauschinger effect considered. © 2012 American Scientific Publishers All rights reserved.
Type
journal article