• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1996 Fiscal Year Final Research Report Summary

Formability of Sheet Metal Laminates Consisting of Layrs of Less Formbility or Weak Laminate Boundaries

Research Project

Project/Area Number 07650104
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

YOSHIDA Fusahito  Hiroshima University, Faculty of Engineering, Professor, 工学部, 教授 (50016797)

Co-Investigator(Kenkyū-buntansha) OKADA Tatsuo  Hiroshima University, Faculty of Engineering, Research Asoociate, 工学部, 助手 (00233338)
Project Period (FY) 1995 – 1996
KeywordsSheet metal laminats / Metal layr of less ductility / Plastic forming / Forming limit / Delamination / Elasto-plastic analysis
Research Abstract

This research project deals with the formability of sheet metal laminates consisting of layrs of less ductility or weak laminate boundaries. The results are summarized as follows.
(1) The forming limits under biaxial stress conditionas are determined based on Hill's theory of lacallized necking and the M-K theory. The minimization of reduction of sheet thickness in roll bonding operation is required since the roll-bonding induced prestrain makes the formability considerably less.
(2) The fracture load in stretch bending becomes lower with decreasing die-radius. For a two-ply laminate, the fracture load is higher for a weak-layr (outside) /strong-layr (inside) laminate compared with the laminate of reversed configuration.
(3) If chromium (whose DBTT is over 150゚C) is clad by some appropriate metals, the clad can be plastically bent at comparatively lower temperature. For example, chromium (outside) /aluminium (inside) laminate can be bent at 50゚C,because the stress in the chromium layar is reduced due to the movement of the neutral surface.
(4) A new testing method of bending of a laminate with a slit is proposed for evaluating the bonding strength of sheet metal laminates.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 日野隆太郎,岡田達夫,吉田総仁: "金属積層板の引張曲げ・曲げ戻しにおける変形挙動" 日本機械学会論文集(A編). 62・565. 165-172 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Hino,F.Yoshida and T.Okada: "Deep Drawability of sheet metal laminates." Proc.3rd Asian-Pacific Symp.Advances of Engineering Plasticity and Its Applications. 703-708 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] F.Yoshida and R.Hino: "Fracture strength in stretch bending at die-corner for sheet metal laminates" Advanced Tecnology of Plasticity 1996. 805-808 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 吉田総仁,日野隆太郎: "金属積層板のプレス成形限界" 塑性と加工. 37・430. 1125-1130 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] F.Yoshida and R.Hino: "Forming Limit of Stainless Steel-Clad Aluminium Sheets under Plane Stress Condition" J.Materials Processing Technology. 63. 66-71 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ryutaro HINO et al.: "Deformation behavior in stretch-bending/unbending for sheet metal laminates." Trans.JSME. 62-595. 165-172 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ryutaro HINO et al.: "Deep drawability of sheet metal laminates." Proc.3rd Asian-Pacific Symp.Advances of Engineering Plasticity and Its Applications. 703-708 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Fusahito YOSHIDA et al.: "Fracture strength in stretch bending at die-corner for sheet metal laminates." Advanced Technology of Plasticity 1996. 805-808 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Fusahito YOSHIDA et al.: "Forming limits of sheet metal laminates." J.of JSTP. 37-430. 1125-1130 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Fusahito YOSHIDA et al.: "Forming limits of stainless steel-clad aluminium sheets under plane stress condition." J.of Materials Processing Technology. 66-71 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1999-03-09  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi