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Titel: Damage quantification in an aluminium-CFRP composite structure using guided wave wavenumber mapping : Comparison of instantaneous and local wavenumber analyses
VerfasserIn: Lugovtsova, Yevgeniya
Bulling, Jannis
Mesnil, Olivier
Prager, Jens
Gohlke, Dirk
Boller, Christian
Sprache: Englisch
Titel: NDT & E International
Bandnummer: 122
Verlag/Plattform: Elsevier
Erscheinungsjahr: 2021
Freie Schlagwörter: Ultrasonic guided waves
Instantaneous wavenumber analysis
Local wavenumber analysis
Signal processing
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Composite-overwrapped pressure vessels (COPV) are increasingly used in the transportation industry due to their high strength to mass ratio. Throughout the years, various designs were developed and found their applications. Currently, there are five designs, which can be subdivided into two main categories - with a load-sharing metal liner and with a non-load-sharing plastic liner. The main damage mechanism defining the lifetime of the first type is fatigue of the metal liner, whereas for the second type it is fatigue of the composite overwrap. Nevertheless, one damage type which may drastically reduce the lifetime of COPV is impact-induced damage. Therefore, this barely visible damage needs to be assessed in a non-destructive way to decide whether the pressure vessel can be further used or has to be put out of service. One of the possible methods is based on ultrasonic waves. In this contribution, both conventional ultrasonic testing (UT) by high-frequency bulk waves and wavenumber mapping by low frequency guided waves are used to evaluate impact damage. Wavenumber mapping techniques are first benchmarked on a simulated aluminium panel then applied to experimental measurements acquired on a delaminated aluminium-CFRP composite plate which corresponds to a structure of COPV with a load-sharing metal liner. The analysis of experimental data obtained from measurements of guided waves propagating in an aluminium-CFRP composite plate with impact-induced damage is performed. All approaches show similar performance in terms of quantification of damage size and depths while being applied to numerical data. The approaches used on the experimental data deliver an accurate estimate of the in-plane size of the large delamination at the aluminium-CFRP interface but only a rough estimate of its depth. Moreover, none of the wavenumber mapping techniques used in the study can quantify every delamination between CFRP plies caused by the impact, which is the case for conventional UT. This may be solved by using higher frequencies (shorter wavelengths) or more advanced signal processing techniques. All in all, it can be concluded that imaging of complex impact damage in fibre-reinforced composites based on wavenumber mapping is not straightforward and stays a challenging task.
DOI der Erstveröffentlichung: 10.1016/j.ndteint.2021.102472
URL der Erstveröffentlichung: http://dx.doi.org/10.1016/j.ndteint.2021.102472
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-383111
hdl:20.500.11880/34568
http://dx.doi.org/10.22028/D291-38311
ISSN: 0963-8695
Datum des Eintrags: 30-Nov-2022
Bezeichnung des in Beziehung stehenden Objekts: Supplementary material
In Beziehung stehendes Objekt: https://github.com/BAMresearch/WavenumberAnalysis
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Materialwissenschaft und Werkstofftechnik
Professur: NT - Prof. Dr. Christian Boller
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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