Photoacoustic microscopy of Vickers indented ceramics with various mutual orientations of radial cracks and external loading

Kyrill L. Muratikov; Alexej L. Glazov

doi:10.1117/12.610548

16 February 2005 Photoacoustic microscopy of Vickers indented ceramics with various mutual orientations of radial cracks and external loading

Kyrill L. Muratikov, Alexej L. Glazov

Author Affiliations +

Proceedings Volume 5447, Lasers for Measurements and Information Transfer 2004; 54470Q (2005) https://doi.org/10.1117/12.610548
Event: Lasers for Measurements and Information Transfer 2004, 2004, St. Petersburg, Russian Federation

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.

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Kyrill L. Muratikov and Alexej L. Glazov "Photoacoustic microscopy of Vickers indented ceramics with various mutual orientations of radial cracks and external loading", Proc. SPIE 5447, Lasers for Measurements and Information Transfer 2004, 54470Q (16 February 2005); https://doi.org/10.1117/12.610548

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