Title:
STEEL MATERIAL FRACTURE PREDICTION METHOD, FRACTURE PREDICTION DEVICE, PROGRAM, AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2020/204059
Kind Code:
A1
Abstract:
This fracture prediction method includes: a first step S11 for calculating a first value which indicates the maximum main strain of a bending outermost surface layer determined through solid elements, by inputting the sheet thickness of a steel material and a limit VDA bending angle to a first relational formula defined by using a finite element method using solid elements; a second step S12 for calculating a second value which indicates the maximum main strain of the bending outermost surface layer determined through shell elements, by inputting the element size of shell elements of a deformation analysis model, the sheet thickness of the steel material, the sheet thickness of the steel material, and the first value to a second relational formula defined by using a finite element method using shell elements; a third step S2 for calculating a third value which indicates the maximum main strain of the outermost surface layer of the steel material by using the finite element method of shell elements; and a fourth step S3 for determining whether deformation will cause fracture in the bending deformation part of the steel material by comparing the second and third values with each other.
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Inventors:
AITOH TAKAHIRO (JP)
Application Number:
PCT/JP2020/014987
Publication Date:
October 08, 2020
Filing Date:
April 01, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
G01N3/30
Domestic Patent References:
| WO2016186135A1 | 2016-11-24 |
Foreign References:
| JP2016080464A | 2016-05-16 |
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (JP)
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