Anzeige
Erschienen in:
2021 | OriginalPaper | Buchkapitel
Toward Composite Damage Classification Using in Situ Wavenumber-Frequency Modal Decomposition of Acoustic Emissions
verfasst von : Cédric Rosalie, Nik Rajic, Stephen van der Velden, L. R. Francis Rose, Joel Smithard, Wing Kong Chiu
Erschienen in: European Workshop on Structural Health Monitoring
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
A multi-element piezoelectric sensing capability is applied to in situ wavenumber-frequency modal decomposition of acoustic emissions (AE) generated by low-velocity impact on a fibre-reinforced polymer composite panel. The modal signatures of the impact AE are shown to be dominated by a low-frequency antisymmetric (A0) Lamb wave, with little discernible difference in signature observed between non-damaging and damaging impacts. An artificial delamination induced mid-thickness in the same panel under quasi-static loading is also considered, for comparison. For this case, the modal signature was found to be dominated by a symmetric (S0) Lamb wave. The prospects and challenges for characterizing impacts based on modal decomposition of AE are briefly discussed in light of these results.