Nonlinear ultrasonic spectroscopy and acoustic emission in SHM of aircrafts

0386163 - ÚT 2013 RIV CZ eng J - Článek v odborném periodiku
Převorovský, Zdeněk - Chlada, Milan - Krofta, Josef
Nonlinear ultrasonic spectroscopy and acoustic emission in SHM of aircrafts.
NDT Welding Bulletin. Roč. 2012, SI (2012), s. 36-40. ISSN 1213-3825
Grant CEP: GA MPO(CZ) FR-TI1/274
Institucionální podpora: RVO:61388998
Klíčová slova: NDT * structural health monitoring * acoustic emission * nonlinear elastic wave spectroscopy * time reversal mirrors
Kód oboru RIV: BI - Akustika a kmity

Example of a complex Structural Health Monitoring (SHM) system design for some critical parts of an aircraft is discussed in this paper. The system was tested during fatigue loading of those parts. The Nonlinear Elastic Wave Spectroscopy (NEWS) pseudo-tomography procedure, based on Time Reversal Mirrors (TRM) with Excitation Symmetry Analysis Method (ESAM) enabled zone-location of small defects, not detectable by other classical non-destructive (NDT) procedures. Damaged zone location results corresponded with acoustic emission (AE) sources localized within the loading periods by using artificial neural networks with so called signal arrival time profiles. Results reflect good robustness of both techniques, and support their helpfulness in SHM of aircraft.
Trvalý link: http://hdl.handle.net/11104/0216195