Studying the evolution of the power spectra of acoustic radiation during the destruction of a solid body

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Abstract

When interpreting acoustic emission (AE) observation data, a model of a crack in the form of a cavity in the shape of an oblate ellipsoid of revolution was used. When the length of its semi-minor axis tends to zero, the ellipsoid models a circular disc-shaped crack. Using data from two amplitude-frequency spectra of AE recorded during the destruction of a concrete sample, distributions of the power of acoustic radiation along the lengths of the semi-axes of the ellipsoidal cavities were constructed. It is shown that by the time the second spectrum is recorded, a redistribution of acoustic radiation occurs in favor of a discrete set of growing main cracks with high semi-major axis lengths and a small opening value.

About the authors

V. T. Belikov

Institute of Geophysics UrB RAS

Author for correspondence.
Email: belik2a@mail.ru
Russian Federation, 620016 Yekaterinburg, Amundsen st., 100

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