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Mechanism of Deformation Process and Blank Shape of Stretch Flanging Fracture of High-Tensile-Strength Steel

Bibliographic Information

Other Title
  • 高張力鋼板のつづみ形伸びフランジ試験とブランク形状の究明
  • コウチョウリョク コウバン ノ ツズミ ケイ ノビ フランジ シケン ト ブランク ケイジョウ ノ キュウメイ

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Abstract

In this study, the stretch flanging fracture of a C-S test piece, which has a curved part (C-part) connected to a straight part (S-part) fabricated using high-tensile-strength steel sheet, is investigated. Both experimental and FEM analyses show several strain concentrations on the edge of the flange, and deformations due to such concentrations can be explained by the consecutive occurrence of the braking effect of the stress gradient. The first concentration of strain, which triggers several strain concentrations, is induced by a nonuniform stress. The cause of the nonuniform stress is considered to be the variation in flanging-up angle during the stamping process. To verify this, a C-S test piece with an additional part (obtained by adjusting the edge contours of the curved part) is also investigated. We concluded that pieces having an additional linear and a serrated edge located outside the additional part are optimal for high formability.

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Details

  • CRID
    1390001206500291072
  • NII Article ID
    10030144909
  • NII Book ID
    AN00135062
  • DOI
    10.9773/sosei.53.357
  • COI
    1:CAS:528:DC%2BC38XpvFGqt7c%3D
  • ISSN
    18820166
    00381586
  • NDL BIB ID
    023744730
  • Text Lang
    ja
  • Data Source
    • JaLC
    • NDL
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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