Real microstructure modeling for stiffness and strength analyses of texture in ores

Tatsuhiko Aizawa, Yoshihiro Suwa, Shinji Muraishi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Theoretical model is proposed to make stiffness and strength analyses for various multi-phase, porous media including the sintered ores. On the basis of the multilevel modeling, a macro-model is used to estimate the crushing strength of sintered ore with various compositions of texture. A micro model for each texture is constructed to represent its characteristic microstructure and to make stiffness and strength analyses. Since the real microstructure is taken into account of the unit cell, the homogenized stiffness provides us the elastic properties of textures with or without micro-pores, The stress analysis both for texture and crushing test-specimen, provides us the theoretical estimate of fracture strength, respectively. Three typical textures in the sintered ore are employed for application of the present theoretical models. The procedure to deduce the theoretical model from the optical micrograph is described for the texture of acicular calcium ferrite. Using the unit cell models for each texture, which is objective to the cell size and geometry, the stiffness and fracture strength are estimated. Assuming that the sintered ore specimen is composed of two phases or composite of porous hematite and slag-hematite complex, the fracture strength is also estimated as the function of volume fraction for porous hematite.

Original languageEnglish
Pages (from-to)2086-2092
Number of pages7
JournalISIJ International
Volume44
Issue number12
Publication statusPublished - 2004
Externally publishedYes

Fingerprint

Ores
Textures
Stiffness
Microstructure
Hematite
Fracture toughness
Crushing
Stress analysis
Slags
Compressive strength
Ferrite
Macros
Porous materials
Calcium
Volume fraction
Geometry
Composite materials
Chemical analysis
ferric oxide

Keywords

  • Crushing test
  • Fracture strength
  • Homogenized stiffness
  • Multilevel modeling
  • Porous medium
  • Real microstructure
  • Sintered ore
  • Texture
  • Theoretical model
  • Unit cell

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Aizawa, T., Suwa, Y., & Muraishi, S. (2004). Real microstructure modeling for stiffness and strength analyses of texture in ores. ISIJ International, 44(12), 2086-2092.

Real microstructure modeling for stiffness and strength analyses of texture in ores. / Aizawa, Tatsuhiko; Suwa, Yoshihiro; Muraishi, Shinji.

In: ISIJ International, Vol. 44, No. 12, 2004, p. 2086-2092.

Research output: Contribution to journalArticle

Aizawa, T, Suwa, Y & Muraishi, S 2004, 'Real microstructure modeling for stiffness and strength analyses of texture in ores', ISIJ International, vol. 44, no. 12, pp. 2086-2092.
Aizawa, Tatsuhiko ; Suwa, Yoshihiro ; Muraishi, Shinji. / Real microstructure modeling for stiffness and strength analyses of texture in ores. In: ISIJ International. 2004 ; Vol. 44, No. 12. pp. 2086-2092.
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