Ultrasonic guided waves in tri-layer structure. Application to study the interaction of guided waves with hidden defect at low frequency
Автор: Rhimini H., El Allami M., Sidki M., Haddout A., Benhadou M.
Журнал: Техническая акустика @ejta
Статья в выпуске: т.16, 2016 года.
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The article presents a study of guided ultrasonic waves in a tri-layer structure formed of two aluminium plates assembled with a layer of epoxy resin. The resolution of the dispersion equation was used to plot the dispersion curves and to determine the energy distribution of a given mode propagating within the structure. On the other hand, the evaluation of the interaction of guided modes at low frequency with hidden defect placed either in one of the aluminium plates at the interface between aluminium and the adhesive layer was presented. The analyse of the reflected and transmitted waves in the dual space (wave number, frequency) permitted the separation and the identification of the propagating guided modes and showed the conversion phenomenon of the incident mode into other guided modes after the reflection and the transmission. Finally a quantification of the energy of the reflected and transmitted modes is presented.
Guided waves, adhesive structure, conversion modes, dispersion curves
Короткий адрес: https://sciup.org/14316202
IDR: 14316202
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