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Numerical analysis of macro-crack formation behavior within the lump coke; Cokes sonai kiretsu shinten kiko no kaiseki

Journal Article:

Abstract

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, K{sub I}, at the macro-crack tip compared with the plane strain fracture toughness, K{sub IC}, 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. 12 refs., 13 figs.
Authors:
Aoki, H; Sato, H; Miura, T [1] 
  1. Tohoku University, Sendai (Japan). Faculty of Engineering
Publication Date:
Mar 15, 1995
Product Type:
Journal Article
Reference Number:
SCA: 010409; PA: NEDO-95:911525; EDB-95:121308; SN: 95001455658
Resource Relation:
Journal Name: Kagaku Kogaku Ronbunshu; Journal Volume: 21; Journal Issue: 2; Other Information: PBD: 15 Mar 1995
Subject:
01 COAL, LIGNITE, AND PEAT; COKE; CARBONIZATION; RETORTING; LAYERS; CRACK PROPAGATION; REACTION KINETICS; HEAT TRANSFER; COKE OVENS; MASS TRANSFER; CRACKS; THERMAL STRESSES; MATHEMATICAL MODELS; MELTING; THERMAL EXPANSION; THERMODYNAMIC PROPERTIES; MECHANICAL PROPERTIES; TEMPERATURE DEPENDENCE; AUGMENTATION; SEMICOKE; CREEP; RADIANT HEAT TRANSFER; STRESS INTENSITY FACTORS; FRACTURE PROPERTIES; DEFORMATION; MICROSTRUCTURE
OSTI ID:
99802
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: KKRBAW; ISSN 0386-216X; TRN: 95:911525
Submitting Site:
NEDO
Size:
pp. 341-348
Announcement Date:

Journal Article:

Citation Formats

Aoki, H, Sato, H, and Miura, T. Numerical analysis of macro-crack formation behavior within the lump coke; Cokes sonai kiretsu shinten kiko no kaiseki. Japan: N. p., 1995. Web.
Aoki, H, Sato, H, & Miura, T. Numerical analysis of macro-crack formation behavior within the lump coke; Cokes sonai kiretsu shinten kiko no kaiseki. Japan.
Aoki, H, Sato, H, and Miura, T. 1995. "Numerical analysis of macro-crack formation behavior within the lump coke; Cokes sonai kiretsu shinten kiko no kaiseki." Japan.
@misc{etde_99802,
title = {Numerical analysis of macro-crack formation behavior within the lump coke; Cokes sonai kiretsu shinten kiko no kaiseki}
author = {Aoki, H, Sato, H, and Miura, T}
abstractNote = {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, K{sub I}, at the macro-crack tip compared with the plane strain fracture toughness, K{sub IC}, 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. 12 refs., 13 figs.}
journal = {Kagaku Kogaku Ronbunshu}
issue = {2}
volume = {21}
journal type = {AC}
place = {Japan}
year = {1995}
month = {Mar}
}