Title:
COMPONENT FRACTURE EVALUATION DEVICE, COMPONENT FRACTURE EVALUATION METHOD, AND COMPUTER PROGRAM
Document Type and Number:
WIPO Patent Application WO/2013/179877
Kind Code:
A1
Abstract:
The probabilities (fatigue strength exceedance probabilities (Pv0) of virtual cells) that the stress amplitude (σp) of operating stress exceeds the stress amplitude (σw) of fatigue strength in respective virtual cells each obtained by equally dividing the area of a machine component so as to include one inclusion and each having a virtual unit volume (V0) are derived, provided that the distribution function of an inclusion size (√area) follows a generalized Pareto distribution. From the fatigue strength exceedance probabilities (Pv0), the probability (fatigue strength exceedance probability (Pfv) of the machine component) that the stress amplitude (σp) of operating stress exceeds the stress amplitude (σw) of fatigue strength in at least one of the virtual cells is derived.
Inventors:
SHIMANUKI HIROSHI (JP)
Application Number:
PCT/JP2013/063286
Publication Date:
December 05, 2013
Filing Date:
May 13, 2013
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
G01N3/32; G01N3/00
Foreign References:
| JP2012073059A | 2012-04-12 | |||
| JP2010256351A | 2010-11-11 | |||
| JPS63194279A | 1988-08-11 |
Other References:
ZHANG J.M. ET AL.: "Estimation of maximum inclusion size and fatigue strength in high-strength ADF1 steel", MATER SCI ENG A STRUCT MATER PROP MICROSTRUCT PROCESS, vol. A394, no. 1/2, 15 March 2005 (2005-03-15), pages 126 - 131, XP004784389
ANDERSON C W ET AL.: "The precision of methods using the statistics of extremes for the estimation of the maximum size of inclusions in clean steels.", ACTA MATER, vol. 48, no. 17, 8 November 2000 (2000-11-08), pages 4235 - 4246, XP055131417
HU CHAO ET AL.: "Locally enhanced Voronoi cell finite element model (LE-VCFEM) for simulating evolving fracture in ductile microstructures containing inclusions", INT J NUMER METHODS ENG, vol. 76, no. 12, 17 December 2008 (2008-12-17), pages 1955 - 1992, XP055131418
HIROSHI SHIMANUKI: "Jikuukeko SUJ2 no Giga Cycle Hiro Tokusei ni Oyobosu Kaizaibutsu Sunpo no Eikyo", CURRENT ADVANCES IN MATERIALS AND PROCESSES (CD-ROM), vol. 23, no. 2, 1 September 2010 (2010-09-01), pages ROMBUNNO.404, XP008171239
"MURAKAMI Yukitaka", 25 December 2008, YOKENDO, article "Metal Fatigue; Effects of small defects and inclusions"
SHIMANUKI H.: "Effect of Inclusion Size on Giga-Cycle Fatigue Properties of SUJ2", CAMP-ISIJ, 2010, pages 688
MATSUMOTO: "Effect of inclusion on rotating bending fatigue strength of carburized and shot-peened steels for gear use", PROCEEDINGS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS CONFERENCE ON MATERIAL MECHANICS, 1990, pages 275,277
See also references of EP 2772746A4
ANDERSON C W ET AL.: "The precision of methods using the statistics of extremes for the estimation of the maximum size of inclusions in clean steels.", ACTA MATER, vol. 48, no. 17, 8 November 2000 (2000-11-08), pages 4235 - 4246, XP055131417
HU CHAO ET AL.: "Locally enhanced Voronoi cell finite element model (LE-VCFEM) for simulating evolving fracture in ductile microstructures containing inclusions", INT J NUMER METHODS ENG, vol. 76, no. 12, 17 December 2008 (2008-12-17), pages 1955 - 1992, XP055131418
HIROSHI SHIMANUKI: "Jikuukeko SUJ2 no Giga Cycle Hiro Tokusei ni Oyobosu Kaizaibutsu Sunpo no Eikyo", CURRENT ADVANCES IN MATERIALS AND PROCESSES (CD-ROM), vol. 23, no. 2, 1 September 2010 (2010-09-01), pages ROMBUNNO.404, XP008171239
"MURAKAMI Yukitaka", 25 December 2008, YOKENDO, article "Metal Fatigue; Effects of small defects and inclusions"
SHIMANUKI H.: "Effect of Inclusion Size on Giga-Cycle Fatigue Properties of SUJ2", CAMP-ISIJ, 2010, pages 688
MATSUMOTO: "Effect of inclusion on rotating bending fatigue strength of carburized and shot-peened steels for gear use", PROCEEDINGS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS CONFERENCE ON MATERIAL MECHANICS, 1990, pages 275,277
See also references of EP 2772746A4
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (JP)
Takayoshi Kokubu (JP)
Takayoshi Kokubu (JP)
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