Krylov IOA Acoustics 2018 - postprint.pdf (138.38 kB)
Acoustic emission spectra associated with the formation of brittle cracks
journal contribution
posted on 2018-05-31, 10:00 authored by Victor V. KrylovIn the present paper, the acoustic emission accompanying the formation of brittle cracks is investigated theoretically, using the approach earlier developed by the present author and his co-workers. This approach is based on the application of Huygens' principle for elastic solids and on the use of suitable elastic Green's functions. In the framework of this approach, the main input information required for calculations of acoustic emission spectra is the normal displacements of the crack edges as a function of frequency and wavenumber. A precise description of this function for different situations of crack formation requires the solution of a complex problem of fracture mechanics, which is not always practical. For that reason, different approximations of this function can be used for practical calculations. A simple approximation of this kind is used in this paper for calculations of the acoustic emission spectra and directivity functions of a crack of finite length. A more refined approximation based on the model of a crack of finite size as a resonator for Rayleigh waves propagating along the crack edges and partly reflecting from the crack tips is briefly discussed. The obtained theoretical results are compared with the existing experimental measurements, where available.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Published in
Proceedings of the Instiute of AcousticsVolume
40Issue
1Pages
177 - 184Citation
KRYLOV, V.V., 2018. Acoustic emission spectra associated with the formation of brittle cracks. Proceedings of the Institute of Acoustics, 40(1), pp. 177-184.Publisher
The Institute of AcousticsVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Acceptance date
2018-04-02Publication date
2018Notes
This paper was accepted for publication in the journal Proceedings of the Institute of Acoustics and the definitive published version is available at http://ioa.org.uk/ISSN
1478-6095Publisher version
Language
- en