Title:
STRESS-STRAIN RELATIONSHIP INFERENCE METHOD AND SPRINGBACK PREDICTION METHOD, AND PRESS FORMED ARTICLE MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2024/043112
Kind Code:
A1
Abstract:
A stress-strain relationship inference method according to the present invention involves: defining a converted parameter obtained by converting a parameter of the Yoshida-Uemori model; setting, as objective functions, the weighted residual sums of squares obtained by multiplying, by individual weighting coefficients, the residuals between experimental values and calculated values of a stress-strain curve under uniaxial tensile stress, the residuals between experimental values and calculated values of a stress-strain curve under repeated tension-compression stress, and the residuals between experimental values and calculated values of a mechanical characteristic value of a metal material; and determining the converted parameter and another parameter so as to minimize the objective functions under a restriction condition relating to possible ranges of the converted parameter and the other parameter.
Inventors:
TAMASHIRO FUMIAKI (JP)
ISHIWATARI AKINOBU (JP)
ISHIWATARI AKINOBU (JP)
Application Number:
PCT/JP2023/029208
Publication Date:
February 29, 2024
Filing Date:
August 10, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
G01N3/08; B21D22/00; G01N3/32; G06F30/23; G06F113/22; G06F119/14
Foreign References:
| JP2014178168A | 2014-09-25 | |||
| JP2013054001A | 2013-03-21 |
Other References:
HIROSHI HAMASAKI , RYUTARO HINO , SOUHITO YOSHIDA: "3401 Identification of kinematic hardening law parameters for stainless steel/aluminum laminates (GS-1 General Session I)", JSME 22ND DESIGN AND SYSTEMS CONFERENCE. DYNAMICS AND DESIGN CONFERENCE ; (YOKOHAMA) : 2012.09.18-21, JAPAN SOCIETY OF MECHANICAL ENGINEERS, JP, vol. 22, 26 September 2012 (2012-09-26) - 21 September 2012 (2012-09-21), JP, pages 1 - 10, XP009552882, DOI: 10.1299/jsmedsd.2012.22._3401-1_
YOSHIDA FUSAHITO, TAKESHI UEMORI: "A Constitutive Equation for Description of Large-Strain Cyclic Plasticity", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS SERIES A, vol. 68, no. 667, 1 March 2002 (2002-03-01), pages 415 - 421, XP093143450, ISSN: 1884-8338, DOI: 10.1299/kikaia.68.415
FUSAHITO YOSHIDA, UEMORI TAKESHI: "A model of large-strain cyclic plasticity describing the Bauschinger effect and workhardening stagnation", INTERNATIONAL JOURNAL OF PLASTICITY, PERGAMON, AMSTERDAM, NL, vol. 18, no. 5-6, 1 October 2002 (2002-10-01), AMSTERDAM, NL , pages 661 - 686, XP055251688, ISSN: 0749-6419, DOI: 10.1016/S0749-6419(01)00050-X
YOSHIDA FUSAHITO, TAKESHI UEMORI: "A Constitutive Equation for Description of Large-Strain Cyclic Plasticity", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS SERIES A, vol. 68, no. 667, 1 March 2002 (2002-03-01), pages 415 - 421, XP093143450, ISSN: 1884-8338, DOI: 10.1299/kikaia.68.415
FUSAHITO YOSHIDA, UEMORI TAKESHI: "A model of large-strain cyclic plasticity describing the Bauschinger effect and workhardening stagnation", INTERNATIONAL JOURNAL OF PLASTICITY, PERGAMON, AMSTERDAM, NL, vol. 18, no. 5-6, 1 October 2002 (2002-10-01), AMSTERDAM, NL , pages 661 - 686, XP055251688, ISSN: 0749-6419, DOI: 10.1016/S0749-6419(01)00050-X
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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