Efficiency assessment of wavelet transforms and wavelets for damage localization in beams using shearography
| 1 | Silesian University of Technology |
| 2 | Polytechnic of Porto |
| 3 | Universidade de Lisboa |
Data publikacji online: 30-10-2018
Data publikacji: 05-11-2018
Data nadesłania: 31-07-2018
Data akceptacji: 26-10-2018
Diagnostyka 2018;19(4):71–79
SŁOWA KLUCZOWE:
DZIEDZINY:
STRESZCZENIE ARTYKUŁU:
Non-destructive testing of engineering structures and elements in operation is one of the crucial steps in recently introduced design philosophies: damage tolerance and condition-based maintenance. Therefore, it is important to provide effective non-destructive testing methods, which are able to detect and identify a possible damage in early stage of its development. One effective testing method, which still gains its popularity in various industrial applications, is shearography. Although, shearography is sensitive to various types of structural damage and flaws, this sensitivity can be significantly improved by applying advanced post-processing algorithms to raw data obtained from measurements. An excellent candidate for such an improvement is the wavelet analysis, due to its very high sensitivity to smallest signal disturbances. This study presents results of comparative analysis of various wavelet transforms and various wavelets in order to analyse their sensitivity to damage. The improvement in damage detectability is verified using experimental data.
AUTOR DO KORESPONDENCJI:
Andrzej Katunin
Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Polska
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