We investigate the propagation of nonlinear guided waves in plates in view of their application to the identification of the state of stress. The study is performed modelling via Finite Elements the propagation of Lamb waves in a prestressed plate, whose equations of motion are a second-order approximation accounting for both geometric and material nonlinearities. Different intial prestress conditions are investigated, parallel and orthogonal to the direction of wave propagation. A couple of physical phenomena presenting remarkable sensitivity to initial stress emerged using the resonant couple of S1-S2 modes. First, the increase of the secondary wave amplitude with propagation distance is clearly observed together with the sensitivity of the second-harmonic amplitude to the initial state of prestress. Second, a subharmonic and superharmonics are observed, due to the interaction between primary and secondary waves.

Stress monitoring of plates by means of nonlinear guided waves / Wang, Meng; Pau, Annamaria. - 270:(2022), pp. 212-220. (Intervento presentato al convegno 10th European Workshop on Structural Health Monitoring tenutosi a Palermo, Italy) [10.1007/978-3-031-07322-9_22].

Stress monitoring of plates by means of nonlinear guided waves

Meng Wang;Annamaria Pau
2022

Abstract

We investigate the propagation of nonlinear guided waves in plates in view of their application to the identification of the state of stress. The study is performed modelling via Finite Elements the propagation of Lamb waves in a prestressed plate, whose equations of motion are a second-order approximation accounting for both geometric and material nonlinearities. Different intial prestress conditions are investigated, parallel and orthogonal to the direction of wave propagation. A couple of physical phenomena presenting remarkable sensitivity to initial stress emerged using the resonant couple of S1-S2 modes. First, the increase of the secondary wave amplitude with propagation distance is clearly observed together with the sensitivity of the second-harmonic amplitude to the initial state of prestress. Second, a subharmonic and superharmonics are observed, due to the interaction between primary and secondary waves.
2022
10th European Workshop on Structural Health Monitoring
Guided waves, nonlinear ultrasounds, secondary harmonic, stress monitoring
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Stress monitoring of plates by means of nonlinear guided waves / Wang, Meng; Pau, Annamaria. - 270:(2022), pp. 212-220. (Intervento presentato al convegno 10th European Workshop on Structural Health Monitoring tenutosi a Palermo, Italy) [10.1007/978-3-031-07322-9_22].
File allegati a questo prodotto
File Dimensione Formato  
Wang_Stress_2022_post_print.pdf

Open Access dal 23/06/2023

Tipologia: Documento in Post-print (versione successiva alla peer review e accettata per la pubblicazione)
Licenza: Creative commons
Dimensione 1.05 MB
Formato Adobe PDF
1.05 MB Adobe PDF
Wang_Stress_2022.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 1.51 MB
Formato Adobe PDF
1.51 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/11573/1622917
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 3
social impact