Caractérisation du comportement mécanique du coke à température ambiante

Jeulin, Dominique; Steiler, J.M.

doi:10.1051/metal/198380020093

Cited by 2 publications

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“…Its tensile strength may be estimated from diametral compression tests on cylinders drilled in the material. A "self-consistent" approach was proposed to relate coke tensile strength to its porous structure [5,17,18] . In this approach, an equivalent médium with a simplified porous geometry and an homogeneous matrix is considered.…”

Section: Specific Morphological Measurement In the Case Of Fracture Mechanicsmentioning

confidence: 99%

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On image analysis and micromechanics

Jeulin

1988

Rev. Phys. Appl. (Paris)

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Section: Specific Morphological Measurement In the Case Of Fracture Mechanicsmentioning

confidence: 99%

“…The two approaches were tested on different metallurgical cokes [5,17,18]. The morphological parameters entering into equations (8) and (10) were measured by image analysis on polished sections prepared close to the fracture plane of the samples.…”

Section: Specific Morphological Measurement In the Case Of Fracture Mechanicsmentioning

confidence: 99%

On image analysis and micromechanics

Jeulin

1988

Rev. Phys. Appl. (Paris)

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“…Direct tensile tests are not suitable for brittle materials like coke because the stress concentration at the point offorce induction into the sample (fixations) cannot be neglected. Accordingly, for coke, the indirect tensile strength determination by the tests as per BCRA and IRSID 3 ) to 16) is used, a test which up to present is standard practice in Germany only for concrete as per DIN 1048. The most important results of the British and French investigations on coke may be quotet")"):…”

Section: Indirect Tensile Test Statistical Distributionmentioning

confidence: 99%

Comments on coke quality characterization by tensile strength

Klose¹,

Suginobe

1985

Steel Research

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According to theoretical and experimental investigations, the indirect tensile test turned out to be applicable to coke qualities. It was stated that: The size of the sample to be tested must be kept constant because, according to the Weibull distribution, size affects tensile strength.The crosshead speed must be kept constant as well. The crosshead speed between 0.1 and 1.0 mm/min, however, has no influence on the tensile strength and should be agreed upon to read 1.0 mm/min for tests to be carried out within reasonable time. This corresponds to the results of BCRA13). Furthermore, it was stated: The true tensile strength of samples which failed under strong deformation, is not measurable. Approximately 100 to 150 samples are sufficient for the statistical evaluation of the tensile strength distribution: Mean and median value or Weibull parameters. (Sample preparation and carrying out of the indirect tensile test for one coke quality requires approximately 16 to 22 hours.) The tensile strength of the coke depends strongly on its porosity. This was stated for porous material in general. The correlation between tensile strength and porosity can be expressed by the Knudsen equation. The introduction of the Griffith model and, accordingly, the notion of the largest pore diameter, does not result in better correlation of tensile strength as a function of coke structure, however, it may be used for interpretation of the coefficients, since a mechanical model is used. For more exact explanation of the correlation between tensile strength and pore structure, further investigations should be carried out.

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Caractérisation du comportement mécanique du coke à température ambiante

Cited by 2 publications

References 0 publications

On image analysis and micromechanics

On image analysis and micromechanics

Comments on coke quality characterization by tensile strength

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