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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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JP7416106Analysis accuracy evaluation method for press forming analysis
Inventors:
KARIYAZAKI YUTA (JP)
SATO KENTARO (JP)
Application Number:
PCT/JP2022/024332
Publication Date:
March 16, 2023
Filing Date:
June 17, 2022
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/00; G06F30/23; G06F113/22
Foreign References:
JP2000275154A2000-10-06
JP2016144825A2016-08-12
JP2012166252A2012-09-06
JP2011141237A2011-07-21
JP2013054001A2013-03-21
JP2013128956A2013-07-04
JP2009204427A2009-09-10
JP2013128956A2013-07-04
JP2009204427A2009-09-10
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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