Numerical Analysis of Macro-Crack Formation Behavior within the Lump Coke

Hideyuki Aoki, Hiroshi Sato, Takatoshi Miura

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4 Citations (Scopus)


The thermal stress analysis within lump coke was studied in order to investigate macro-crack formation and deformation behavior which strongly influence heat and mass transfer in a coke oven chamber. The dilatation of plastic layer, heating rate dependence of thermophysical and mechanical properties of coal/coke, creep in the plastic and semi-coke layers, macro-crack propagation and radiative heat transfer within the macro-crack were considered in an analytical model. The macro-crack propagation was determined from the estimated crack tip stress intensity factor, Khat the macro-crack tip compared with the plane strain fracture toughness, KIC, through the unsteady-state calculation. Calculated results on crack formation and deformation behavior of lump coke were in good agreement with experimental observations in a laboratory-scale oven chamber. The analytical model could predict micro-crack formation within the lump coke normal to the heated wall and the coke surface close to the heated wall.

Original languageEnglish
Pages (from-to)341-348
Number of pages8
JournalKagaku Kogaku Ronbunshu
Issue number2
Publication statusPublished - 1995


  • Carbonization
  • Crack
  • Creep Analysis
  • Dilatation
  • FEM
  • Stress Intensity Factor


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