TY - JOUR
T1 - Experimental and numerical analysis of multilayered steel sheets upon bending
AU - Oya, Tetsuo
AU - Tiesler, Nicolas
AU - Kawanishi, Seiichiro
AU - Yanagimoto, Jun
AU - Koseki, Toshihiko
N1 - Funding Information:
The present research was conducted as part of the LISM (Layer-Integrated Steels and Metals) Project funded by the Ministry of Education, Culture, Sports, Science and Technology of Japan.
PY - 2010/11/1
Y1 - 2010/11/1
N2 - In this study, the bending formability of multilayered steel sheets is evaluated by tensile tests, V-bending tests, and hemming tests. Enhanced formability was observed in these experiments, namely, the constituent high-strength materials were elongated beyond the original fracture strain limit. As a result of this effect, multilayered steel sheets were successfully formed in V-bending tests and even in hemming tests. Observations using a scanning electron microscope verified that no delamination occurred at interfaces. To represent the geometrical features of a multilayered steel sheet, a solid-element model under an isostrain condition was utilized in finite element modeling, where the rule of mixtures was adopted to obtain the flow curve of the constituent high-strength material, and a good agreement with experimental results was observed. Analyses using this finite element model were conducted to investigate the effect of the geometry on the springback of multilayered steel sheets undergoing V-bending.
AB - In this study, the bending formability of multilayered steel sheets is evaluated by tensile tests, V-bending tests, and hemming tests. Enhanced formability was observed in these experiments, namely, the constituent high-strength materials were elongated beyond the original fracture strain limit. As a result of this effect, multilayered steel sheets were successfully formed in V-bending tests and even in hemming tests. Observations using a scanning electron microscope verified that no delamination occurred at interfaces. To represent the geometrical features of a multilayered steel sheet, a solid-element model under an isostrain condition was utilized in finite element modeling, where the rule of mixtures was adopted to obtain the flow curve of the constituent high-strength material, and a good agreement with experimental results was observed. Analyses using this finite element model were conducted to investigate the effect of the geometry on the springback of multilayered steel sheets undergoing V-bending.
KW - Bending formability
KW - Finite element analysis
KW - Multilayered steel sheet
KW - Springback
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U2 - 10.1016/j.jmatprotec.2010.07.003
DO - 10.1016/j.jmatprotec.2010.07.003
M3 - Article
AN - SCOPUS:77956340424
VL - 210
SP - 1926
EP - 1933
JO - Journal of Materials Processing Technology
JF - Journal of Materials Processing Technology
SN - 0924-0136
IS - 14
ER -