This pape rinvestigates the interaction of the SH0 mode with discontinuities in plate waveguides. The scattered fields are evaluated using a novel method that exploits the principle of reciprocity in elastodynamics. The results obtained compare to those provided by a finite element model.Very good agreement between the analytical and numerical models proves the effectiveness of the proposed approach, enabling us to clearly elucidate the role of the different size and shape parameters involved. The discontinuities considered are single and double sharp reductions of plate height of different amounts and lengths, where both symmetric and nonsymmetric one-sided notch cases are treated. Regimes related to low and high values of the product frequency and height of the plate are investigated, showing the dependence of reflection and transmission coefficients on length and height of the discontinuity, as well as the occurrence of mode conversion. The analytical approach proposed leads to a better understanding of the interaction of guided waves with discontinuities, which may stimulate thea pplication of guided waves to defect sizing rather than to simple detection.

Scattering of guided shear waves in plates with discontinuities / Pau, A.; Achillopoulou, D.; Vestroni, F.. - In: NDT & E INTERNATIONAL. - ISSN 0963-8695. - STAMPA. - 84:(2016), pp. 67-75. [10.1016/j.ndteint.2016.08.004]

Scattering of guided shear waves in plates with discontinuities

A. Pau
;
F. Vestroni
2016

Abstract

This pape rinvestigates the interaction of the SH0 mode with discontinuities in plate waveguides. The scattered fields are evaluated using a novel method that exploits the principle of reciprocity in elastodynamics. The results obtained compare to those provided by a finite element model.Very good agreement between the analytical and numerical models proves the effectiveness of the proposed approach, enabling us to clearly elucidate the role of the different size and shape parameters involved. The discontinuities considered are single and double sharp reductions of plate height of different amounts and lengths, where both symmetric and nonsymmetric one-sided notch cases are treated. Regimes related to low and high values of the product frequency and height of the plate are investigated, showing the dependence of reflection and transmission coefficients on length and height of the discontinuity, as well as the occurrence of mode conversion. The analytical approach proposed leads to a better understanding of the interaction of guided waves with discontinuities, which may stimulate thea pplication of guided waves to defect sizing rather than to simple detection.
2016
shear waves, reflection and transmission coefficients, discontinuities, reciprocity in elastodynamics, plate waveguide
01 Pubblicazione su rivista::01a Articolo in rivista
Scattering of guided shear waves in plates with discontinuities / Pau, A.; Achillopoulou, D.; Vestroni, F.. - In: NDT & E INTERNATIONAL. - ISSN 0963-8695. - STAMPA. - 84:(2016), pp. 67-75. [10.1016/j.ndteint.2016.08.004]
File allegati a questo prodotto
File Dimensione Formato  
Pau_Scattering_2016.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 1.12 MB
Formato Adobe PDF
1.12 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/880990
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 35
  • ???jsp.display-item.citation.isi??? 32
social impact