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Patent Searching and Data


Title:
DEFORMATION ANALYSIS DEVICE, DEFORMATION ANALYSIS METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2014/181491
Kind Code:
A1
Abstract:
Provided is a deformation analysis device, comprising: a storage unit (12) which stores material analysis data; a state variable computation unit (152) which computes stress and other state variables for each element of the material in a deformation of the material at each point in time on the basis of the analysis data; a breakage determination unit (153) which determines whether breakage has occurred on the basis of a breakage limit stress line which is derived in advance for each element of the material on the basis of the computed state variables; and a stress correction unit (154) which, without eliminating the element of the material determined to have incurred the breakage, reduces the rigidity thereof and updates the analysis data by reducing σ according to the formula σ=(1-D)σ', where σ is stress with lowered rigidity taken into account, D is a damage variable in continuum damage mechanics (where 0≤D≤1), and σ' is stress with lowered rigidity not taken into account.

Inventors:
HIROSE SATOSHI (JP)
NIWA TOSHIYUKI (JP)
TSUNEMI YUSUKE (JP)
Application Number:
PCT/JP2013/083483
Publication Date:
November 13, 2014
Filing Date:
December 13, 2013
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
G01N3/00; G06F17/50
Foreign References:
JP2008310627A2008-12-25
JP2007152407A2007-06-21
JP4980499B22012-07-18
JP2011053807A2011-03-17
Other References:
NA LIU ET AL.: "Investigation on fatigue-creep interaction damage model for solder", PROCEEDINGS, 2008 INTERNATIONAL CONFERENCE ON ELECTRONIC PACKAGING TECHNOLOGY & HIGH DENSITY PACKAGING (ICEPT-HDP 2008, 28 July 2008 (2008-07-28), pages 1 - 3, XP031312610
JINLONG WANG ET AL.: "Study on Multi- field Coupled Model and Numerical Simulation During Excavation of Tunnel", 2008 INTERNATIONAL WORKSHOP ON MODELLING, SIMULATION AND OPTIMIZATION, 27 December 2008 (2008-12-27), pages 334 - 337, XP031410222
See also references of EP 2924596A4
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (JP)
Takayoshi Kokubu (JP)
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