Calculation of guided wave dispersion characteristics using a three-transducer measurement system

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dc.contributor.authorHernandez Crespo, Borja
dc.contributor.authorCourtney, Charles R. P.
dc.contributor.authorEngineer, Bhavin
dc.date.accessioned2019-01-08T14:38:17Z
dc.date.available2019-01-08T14:38:17Z
dc.date.issued2018-07-29
dc.description.abstractGuided ultrasonic waves are of significant interest in the health monitoring of thin structures, and dispersion curves are important tools in the deployment of any guided wave application. Most methods of determining dispersion curves require accurate knowledge of the material properties and thickness of the structure to be inspected, or extensive experimental tests. This paper presents an experimental technique that allows rapid generation of dispersion curves for guided wave applications when knowledge of the material properties and thickness of the structure to be inspected are unknown. The technique uses a single source and measurements at two points, making it experimentally simple. A formulation is presented that allows calculation of phase and group velocities if the wavepacket propagation time and relative phase shift can be measured. The methodology for determining the wavepacket propagation time and relative phase shift from the acquired signals is described. The technique is validated using synthesized signals, finite element model-generated signals and experimental signals from a 3 mm-thick aluminium plate. Accuracies to within 1% are achieved in the experimental measurements.en_UK
dc.identifier.citationBorja Hernandez Crespo, Charles R. P. Courtney and Bhavin Engineer. Calculation of guided wave dispersion characteristics using a three-transducer measurement system. Applied Sciences, 2018, Volume 8, Issue 8, Article number 1253en_UK
dc.identifier.issn2076-3417
dc.identifier.urihttps://doi.org/10.3390/app8081253
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13798
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectguided wavesen_UK
dc.subjectlamb waveen_UK
dc.subjectdispersion curvesen_UK
dc.subjectphase velocityen_UK
dc.subjectgroup velocityen_UK
dc.subjectsignal processingen_UK
dc.titleCalculation of guided wave dispersion characteristics using a three-transducer measurement systemen_UK
dc.typeArticleen_UK

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