Szczegóły publikacji
Opis bibliograficzny
An insight on the impact of the local and global nonlinearities on the features of propagating guided ultrasonic waves / R. RADECKI, P. KIJANKA, P. PAĆKO // W: APCNDT 2017 [Dokument elektroniczny] : 15th Asia Pacific Conference for Non-Destructive Testing : NDT for enhanced safety, quality and productivity : November 13–17, 2017, Singapore. — Wersja do Windows. — Dane tekstowe. — [Singapore : APFNDT, NDTSS], [2017]. — S. 1–8 ID204. — Wymagania systemowe: Adobe Reader. — Tryb dostępu: https://www.ndt.net/events/APCNDT2017/app/content/Paper/204_R... [2020-04-17]. — Bibliogr. s. 8, Abstr.
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 128358 |
|---|---|
| Data dodania do BaDAP | 2020-04-22 |
| Rok publikacji | 2017 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Creative Commons |
Abstract
The propagation of guided ultrasonic waves is a phenomenon of a burgeoning interest in the fields of structural health monitoring and non-destructive testing. In particular, Lamb waves are a peculiar representative of the guided ultrasonic waves propagating in plate-like structures. In spite of their multi-modal and dispersive features, they are often utilised in damage detection methods. However, those methods are based on examination of the socalled linear features of Lamb waves (i.e. change of time-of-flight or wave amplitude), which in some damage cases may not be sufficient to observe the degradation of the structure. Thus, the nonlinear features of Lamb waves exhibited in the spectral domain are exploited. Various sources of nonlinearity can be differentiated, i.e. with local characteristics (breathing motion of crack) and global (nonlinear characteristic of the structures’ material), where each of them has their own impact on the spectral features of the propagating wave. As the result, a complex behaviour is obtained which can only be analysed in the proper way through the numerical simulation. Hence, this work discusses the results of numerical simulations, where the impact of the excitation magnitude and choice of the frequency on the wave spectral features is investigated. Moreover, influence of the respective local and global sources of nonlinearity is also examined. This leads to the conclusion of the appropriate approach to observe the desired phenomenon, which can be further applied in the experimental investigation.
