Title:
PRESS FORMING CRACK DETERMINATION METHOD, PRESS FORMING CRACK DETERMINATION APPARATUS, AND PRESS FORMING CRACK DETERMINATION PROGRAM, AND PRESS FORMING CRACK SUPPRESSING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/037689
Kind Code:
A1
Abstract:
A press forming crack determination method according to the present invention is for determining, in press forming of a metal sheet, the presence or absence of occurrence of cracks at a portion of the metal sheet where the deformation path changes from compressive deformation to tensile deformation, the method comprising: a step (S10) for deriving a forming limit condition relating to the occurrence of cracks in metal sheets on the basis of a basic forming test for deforming metal sheets in a deformation path changing from compressive deformation to tensile deformation and of an FEM analysis thereof; and a step (S20) for determining, on the basis of the derived forming limit condition, the presence or absence of occurrence of cracks at a portion of the metal sheet where the deformation path changes from compressive deformation to tensile deformation.
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Inventors:
KARIYAZAKI, Yuta (JP)
SATO, Kentaro (JP)
SATO, Kentaro (JP)
Application Number:
PCT/JP2022/024332
Publication Date:
March 16, 2023
Filing Date:
June 17, 2022
Export Citation:
Assignee:
JFE STEEL CORPORATION (JP)
International Classes:
B21D22/00; G06F30/23; G06F113/22
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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