Influence of Bauschinger effect and anisotropy on springback of aluminum alloy sheets

Takeshi Uemori, Satoshi Sumikawa, Tetsuo Naka, Ninshu Ma, Fusahito Yoshida

Research output: Contribution to journalArticle

Abstract

For accurate springback calculations, the development of accurate constitutive equation Yoshida-Uemori model must always be taken into account. However, several springback calculations of other sheet metals by Yoshida- Uemori model have shown wrong agreements with the corresponding experimental data. The reason is why most of them have been calculated from the view point of the accuracy of Bauschinger effect without the strong anisotropy of sheet metal. In the present paper, we have investigated how the initial anisotropy affects the amount of springback for aluminum sheet metals with Bauschinger effect. Specifically, hat bending experiments in R.D. and T.D. were compared with the corresponding calculations. From the above mentioned comparisons, we found that the optimum combination of an anisotropic yield functions and Yoshida-Uemori model is very important for accurate springback analysis.

Original languageEnglish
Pages (from-to)582-587
Number of pages6
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume65
Issue number11
Publication statusPublished - 2015

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Keywords

  • Aluminum alloy sheet
  • Anisotropic yield function
  • Bending
  • Springback
  • Yoshida-Uemori model

ASJC Scopus subject areas

  • Materials Chemistry
  • Metals and Alloys
  • Mechanical Engineering
  • Mechanics of Materials

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