Experimental and numerical analysis of multilayered steel sheets upon bending

Tetsuo Oya, Nicolas Tiesler, Seiichiro Kawanishi, Jun Yanagimoto, Toshihiko Koseki

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1926-1933
Number of pages8
JournalJournal of Materials Processing Technology
Volume210
Issue number14
DOIs
Publication statusPublished - 2010 Nov 1

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Keywords

  • Bending formability
  • Finite element analysis
  • Multilayered steel sheet
  • Springback

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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