A study of the mechanical properties of highly porous ceramics using acoustic emission

In this paper the results of indirect tensile tests on highly porous ceramics are presented. A relation between the mechanical strength of the highly porous ceramic materials and Acoustic Emission (AE) has been established. We have shown that the amplitude distribution of the AE events depends on th...

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Bibliographic Details
Published in:Journal of materials science 1998-11, Vol.33 (22), p.5455-5462
Main Authors: AUE, J, DE HOSSON, J. T. M
Format: Article
Language:English
Subjects:
Acoustic emission testing
Acoustic properties
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Ceramics
Chemical industry and chemicals
Compressive properties
Compressive strength
Damage accumulation
Emission analysis
Exact sciences and technology
Materials science
Mechanical properties
Miscellaneous
Porous materials
Shear stress
Technical ceramics
Tensile tests
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Summary:In this paper the results of indirect tensile tests on highly porous ceramics are presented. A relation between the mechanical strength of the highly porous ceramic materials and Acoustic Emission (AE) has been established. We have shown that the amplitude distribution of the AE events depends on the crack velocity, which itself depends on the stress intensity of the crack. Apart from the Brazilian (side crushing strength) tests also multi-point loading experiments were carried out. The AE results show the additional damage accumulation due to compressive/shear stresses.
ISSN:0022-2461
1573-4803
DOI:10.1023/A:1004470905641