5K-4 Pseudo-3d Modeling Of The Lamb Wave Field Generated By A Surface-Bonded, Finite-Sized Piezoelectric Transducer

2006 ◽  
Author(s):  
M. Baouahi ◽  
J. Assaad ◽  
E. Moulin ◽  
S. Grondel
Keyword(s):  
Wave Field ◽  
3D Modeling ◽  
Piezoelectric Transducer ◽  
Lamb Wave

Influence of a delamination on Lamb wave excitation by a nearby piezoelectric transducer

2020 ◽  
pp. 1045389X2091997 ◽  
Author(s):  
Alisa N Shpak ◽  
Mikhail V Golub ◽  
Inka Mueller ◽  
Artem Eremin ◽  
Jens Kathol ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Piezoelectric Transducer ◽  
Lamb Wave ◽  
Lamb Waves ◽  
Boundary Integral ◽  
Experimental Investigations ◽  
Wave Excitation ◽  
Damage Scenarios ◽  
Active Sensor ◽  
Piezoelectric Wafer

This article presents the results of theoretical and experimental investigations of characteristic changes of Lamb wave excitation and scattering by a strip-like horizontal delamination in a layered elastic waveguide for Lamb waves induced by a piezoelectric wafer active sensor. The boundary integral equation method is used to describe wave propagation in an infinite layered waveguide with a delamination, while the frequency domain spectral element method is employed to model the dynamic behaviour of the piezoelectric wafer active sensor, which allows to simulate debonding between the piezoelectric wafer active sensor and the waveguide. Experimental investigations of the dynamic interaction of the piezoelectric wafer active sensor with a layered plate containing a horizontal delamination is conducted for several damage scenarios, showing a good agreement with the results obtained using the developed mathematical model. The obtained mathematical model is employed to analyse alteration of the piezo-induced Lamb waves including modes’ decomposition due to delamination. The conversion and/or conservation of the Lamb waves on account of a delamination is investigated. The electro-mechanical impedance of the piezoelectric transducer and the stress intensity factors of a delamination are analysed in dependence on the delamination location.

Pseudo-3D modeling of a surface-bonded Lamb wave source

2006 ◽  
Vol 119 (5) ◽  
pp. 2575-2578 ◽  
Author(s):  
Emmanuel Moulin ◽  
Sébastien Grondel ◽  
Mustapha Baouahi ◽  
Jamal Assaad
Keyword(s):  
3D Modeling ◽  
Lamb Wave ◽  
Wave Source

Damage Detection Using In-Situ Piezo Transducers on a Composite Laminate Using Lamb Wave

2011 ◽  
Vol 83 ◽  
pp. 267-273
Author(s):  
S. Saravanan ◽  
K.R. Natarajan ◽  
J.L. Yang ◽  
B. S. Wong ◽  
N. Q. Guo
Keyword(s):  
Damage Detection ◽  
Piezoelectric Transducer ◽  
Lamb Wave ◽  
Composite Laminate ◽  
Impact Damage ◽  
Fibre Composite ◽  
Low Velocity Impact ◽  
Active Monitoring ◽  
The Impact

This paper is aimed at experimentally developing an in-situ macro-fibre composite (MFCTM) piezoelectric transducer sparse array which functions as both actuator and sensor of Lamb wave for damage detection in composite laminate. Lamb waves which have been used in non-destructive evaluation (NDE) of plate-like structures, can be used for active monitoring and interrogating the health of the structures due to their long range propagation with less attenuation. MFC acting as a powerful actuator of Lamb wave as well as a sensitive sensor is highly conformable and anisotropic in behaviour compared to monolithic piezoelectric transducer. The surface bonded MFC transducer on woven carbon fibre reinforced plastic (CFRP) laminate shows directional Lamb wave generation and reception characteristics. Pitch catch approach is used for low velocity impact damage detection. The MFC sensor shows a drastic drop in signal amplitude with the growth of the impact damage.

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