The Theoretical Prediction of Forming Limit Strains of Sheet Metals in Press-Forming Processes

• GOTOH Manabu

抄録

The theoretical prediction of the forming limit (strain) diagram (FLD), or the forming limit strains of sheet metals by the author's method is reviewed, giving some new and useful information. J₂-Gotoh's corner theory; (or MG-) (J2G) constitutive equation previously proposed by the author is used, together with the localized necking condition as the failure condition. Theoretical FLD nets of sheet metals subjected to various proportional loadings are illustrated with the n-value orρ-value as the parameter for the convenience of determining the most appropriate value ofρ(the material constant involved in the J2G). Furthermore, discussions onρ-and n-values and on the material properties of the prestrained sheet are given. The secondary-FLD and the sheet thickness effects on the forming limit strains are also discussed.

収録刊行物

• JSME international journal. Ser. 1, Solid mechanics, strength of materials

  JSME international journal. Ser. 1, Solid mechanics, strength of materials 34 (3), 297-304, 1991

  一般社団法人 日本機械学会

キーワード

• Plasticity
• Forming Limit Strain
• FLD
• Sheet Metal
• Vertex-Hardening Theory
• J2G
• Localized Necking
• Press-Forming

詳細情報

• CRID: 1390282680408427264
• NII論文ID: 110002348017
• NII書誌ID: AA10680585
• DOI: 10.1299/jsmea1988.34.3_297
• ISSN: 09148809
• Web Site: https://www.jstage.jst.go.jp/article/jsmea1988/34/3/34_3_297/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可