Title:
STRESS-STRAIN RELATIONSHIP SIMULATION METHOD, SPRING BACK PREDICTION METHOD, AND SPRING BACK ANALYZING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/141794
Kind Code:
A1
Abstract:
This method acquires an experimental value for a stress-strain relationship by plastically deforming an elastic-plastic material by displacing or applying a load on same. A calculator: identifies, by using the acquired experimental value, a material parameter contained in an elastic-plastic constitutive model as a prescribed first formula expressing a kinematic hardening incremental vector (dαij) for a yield surface in the elastic-plastic constitutive model that is defined as the function for stress and back stress; identifies a material parameter contained in a prescribed second formula on the basis of the prescribed first formula into which the identified material parameter is substituted and the acquired experimental value; and simulates the stress-strain relationship of the elastic-plastic material by using the prescribed first formula and the prescribed second formula, into which the identified material parameters are substituted, and the elastic-plastic constitutive model.
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Inventors:
SUMIKAWA SATOSHI (JP)
ISHIWATARI AKINOBU (JP)
ISHIWATARI AKINOBU (JP)
Application Number:
PCT/JP2014/053069
Publication Date:
September 18, 2014
Filing Date:
February 10, 2014
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
G01N3/00; B21D5/01; B21D22/00
Foreign References:
| JP3809374B2 | 2006-08-16 | |||
| JP3809374B2 | 2006-08-16 |
Other References:
TORU YOSHIDA ET AL.: "Material Modeling for Improving the Springback Prediction of High Strength Steel Sheets", SHIN NITTETSU GIHO, no. 392, March 2012 (2012-03-01), pages 65 - 71, XP008177932
SATOSHI SUMIKAWA ET AL.: "Dansei Oyobi Sosei Ihosei to Bauschinger Koka o Koryo shita Springback Kaiseki", DAI 63 KAI THE PROCEEDINGS OF JAPANESE JOINT CONFERENCE FOR THE TECHNOLOGY OF PLASTICITY, 15 October 2012 (2012-10-15), pages 109 - 110, XP008177936
G.S HEGDE ET AL.: "Interface driven optimisation of springback in stretch bending of autobody panels", ARCHIVES OF COMPUTATIONAL MATERIALS SCIENCE AND SURFACE ENGINEERING, vol. 1, 2009, pages 168 - 173, XP055221146
YOSHIDA, F.; UEMORI, T., INT. J. PLASTICITY, vol. 18, 2002, pages 661 - 686
SATOSHI SUMIKAWA ET AL.: "Dansei Oyobi Sosei Ihosei to Bauschinger Koka o Koryo shita Springback Kaiseki", DAI 63 KAI THE PROCEEDINGS OF JAPANESE JOINT CONFERENCE FOR THE TECHNOLOGY OF PLASTICITY, 15 October 2012 (2012-10-15), pages 109 - 110, XP008177936
G.S HEGDE ET AL.: "Interface driven optimisation of springback in stretch bending of autobody panels", ARCHIVES OF COMPUTATIONAL MATERIALS SCIENCE AND SURFACE ENGINEERING, vol. 1, 2009, pages 168 - 173, XP055221146
YOSHIDA, F.; UEMORI, T., INT. J. PLASTICITY, vol. 18, 2002, pages 661 - 686
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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