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Abstract: In this study, Lamb wave propagation phenomena have been used to localise discontinuities in aluminium and composite panels. For that purpose, piezoelectric transducers have been used to excite and register Lamb waves in the panels. Excited waves that propagate and reflect from the panel edges and discontinuities were registered by piezoelectric sensors as voltage changes in time. Three...
In this paper, a problem of piezoelectric transducers used for damage localisation in an aluminium plate is investigated. Waves propagate in a specimen and reflect from boundaries and from discontinuities. Because damage reflected signals very often have a low amplitude, a phased array concept is utilized to amplify the signal. The amplification is based on the wave interference phenomenon. The star...
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