Szczegóły publikacji
Opis bibliograficzny
Damage detection in plate-like structures based on mode-conversion sensing with 3D laser vibrometer / Ł. AMBROZIŃSKI, J. SPYTEK, K. DZIEDZIECH, Ł. PIECZONKA, W. J. STASZEWSKI // W: IUS 2017 [Dokument elektroniczny] : IEEE International Ultrasonics Symposium : 6-9 September 2017, Washington. — Wersja do Windows. — Dane tekstowe. — [Piscataway] : IEEE, [2017]. — (IEEE International Ultrasonics Symposium : proceedings ; ISSN 1948-5727). — e-ISBN: 978-1-5386-3383-0. — S. [1–4]. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 4, Abstr.
Autorzy (5)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 110128 |
|---|---|
| Data dodania do BaDAP | 2017-12-09 |
| Tekst źródłowy | URL |
| DOI | 10.1109/ULTSYM.2017.8092957 |
| Rok publikacji | 2017 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Wydawca | Institute of Electrical and Electronics Engineers (IEEE) |
| Konferencja | IEEE International Ultrasonics Symposium |
| Czasopismo/seria | IEEE International Ultrasonics Symposium |
Abstract
Interpretation of Lamb waves signals raises serious difficulties due to their multi-modal nature. Various modes propagating with different velocities can be confused and erroneously treated as damage reflected components. Both S0 and A0 Lamb modes exhibit elliptical polarization, therefore, their in-plane and out-of plane motion components are shifted by ± 90°. Also, the ratios of in-plane and out-of-plane displacements between these components vary and the direction of particle motion is opposite for both modes. Using a 3D scanning laser vibrometer it is possible to capture the in-plane and out-of-plane motion. The modes differ not only in polarization parameters but also in group velocities, therefore, normally they are well separated in time. Two modes can occur simultaneously only close to the wave source or to a defect that leads to mode conversion. Since the in-plane and out-of plane motion components are generally out-of-phase, a comparison of these components permits detection of mode conversion, which leads to superior and reliable damage detection. Here, we present a damage imaging method based on mode-conversion indicator (MCI).
