Time-distance domain transformation for Acoustic Emission source localization in thin metallic plates

Krzysztof Grabowski, Mateusz Gawronski, Ireneusz Baran, Wojciech Spychalski, Wieslaw J. Staszewski, Tadeusz Uhl, Tribikram Kundu, Pawel Packo

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Acoustic Emission used in Non-Destructive Testing is focused on analysis of elastic waves propagating in mechanical structures. Then any information carried by generated acoustic waves, further recorded by a set of transducers, allow to determine integrity of these structures. It is clear that material properties and geometry strongly impacts the result. In this paper a method for Acoustic Emission source localization in thin plates is presented. The approach is based on the Time-Distance Domain Transform, that is a wavenumber-frequency mapping technique for precise event localization. The major advantage of the technique is dispersion compensation through a phase-shifting of investigated waveforms in order to acquire the most accurate output, allowing for source-sensor distance estimation using a single transducer. The accuracy and robustness of the above process are also investigated. This includes the study of Young's modulus value and numerical parameters influence on damage detection. By merging the Time-Distance Domain Transform with an optimal distance selection technique, an identification-localization algorithm is achieved. The method is investigated analytically, numerically and experimentally. The latter involves both laboratory and large scale industrial tests.

Original languageEnglish (US)
Pages (from-to)142-149
Number of pages8
JournalUltrasonics
Volume68
DOIs
StatePublished - May 1 2016

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Keywords

  • Acoustic Emission
  • Dispersion
  • Source localization
  • Time-distance domain transform
  • Wave propagation

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Grabowski, K., Gawronski, M., Baran, I., Spychalski, W., Staszewski, W. J., Uhl, T., Kundu, T., & Packo, P. (2016). Time-distance domain transformation for Acoustic Emission source localization in thin metallic plates. Ultrasonics, 68, 142-149. https://doi.org/10.1016/j.ultras.2016.02.015