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Proceedings Paper

Photoacoustic microscopy of Vickers indented ceramics with various mutual orientations of radial cracks and external loading
Author(s): Kyrill L. Muratikov; Alexej L. Glazov
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Paper Abstract

The process of the photoacoustic signal formation in nonhomogenious samples is analyzed. Within the framework of a three dimensional model and a perturbation theory expressions are obtained in general form for the thermoelastic deformations taking into account inhomogeneties of the thermoelastic parameter of a sample. The obtained results are applied to analysis of the photoacoustic signal behavior near the tips of vertical cracks. The variations of the photoacoustic signal near the tips of radial cracks in Vickers indented Al2O3-SiC-TiC ceramics are studied experimentally. A special attention is paid to the case of various mutual orientation of radial cracks and external loading. Experimental and theoretical data for the effect of external stresses on the photoacoustic signal near the tips of radial cracks are compared. It is demonstrated that for Al2O3-SiC-TiC ceramics agreement is fairly good. It is also shown that the stress intensity factors of the radial crack tips can be determined based on the developed theoretical model and experimental data.

Paper Details

Date Published: 16 February 2005
PDF: 11 pages
Proc. SPIE 5447, Lasers for Measurements and Information Transfer 2004, 54470Q (16 February 2005); doi: 10.1117/12.610548
Show Author Affiliations
Kyrill L. Muratikov, A.F. Ioffe Physico-Technical Institute (Russia)
Alexej L. Glazov, A.F. Ioffe Physico-Technical Institute (Russia)

Published in SPIE Proceedings Vol. 5447:
Lasers for Measurements and Information Transfer 2004
Vadim E. Privalov, Editor(s)

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