An In-Depth Analysis on the Resonant Characteristics of Surface Bonded Piezoelectric Wafer Active Transducer for Symmetric Lamb Wave Generation

2021 ◽  
Author(s):  
Haiying Huang
Keyword(s):  
Lamb Wave ◽  
Wave Generation ◽  
Depth Analysis ◽  
Piezoelectric Wafer

Influence of Adhesive Layer on Actuation of Lamb Wave Signals

2012 ◽  
Vol 525-526 ◽  
pp. 617-620 ◽  
Author(s):  
Z. Sharif-Khodaei ◽  
Qu Liu ◽  
M.H. Aliabadi
Keyword(s):  
Lamb Wave ◽  
Adhesive Layer ◽  
Composite Plates ◽  
Wave Generation ◽  
Actuation Frequency ◽  
Adhesive Thickness

In this work, Lamb wave generation and propagation have been modelled in composite plates. Actuation and acquisition of signals when the PZT transducers are tied to the structure or bonded with an adhesive layer are investigated. The effect of adhesive thickness and actuation frequency of Lamb wave have been examined.

Flexible Tunable Interdigital Transducer for Lamb Wave Generation

2016 ◽  
Vol 251 ◽  
pp. 120-125
Author(s):  
Michał Mańka
Keyword(s):  
Lamb Wave ◽  
Power Source ◽  
Wave Generation ◽  
Interdigital Transducer ◽  
Novel Concept ◽  
Physical Changes

In this paper a novel concept of the MFC based IDT, Tunable Interdigital Transducer (T-IDT), is presented. The proposed transducer is the extension of the MFC based IDT, where the solid comb electrodes are replaced by series of discrete, stripe electrodes which can be connected independently into the groups and connected to the power source. The span between the centers of the electrodes' groups connected to the same phase are corresponding to the nominal wavelength of the wave excited by the transducer. This makes possible matching to different wavelengths without a need of physical changes of the electrodes’ layout.

Interdigitated PVDF transducer for Lamb wave generation and reception

2005 ◽  
Author(s):  
Hua Gu ◽  
George M. Lloyd ◽  
Ming L. Wang
Keyword(s):  
Lamb Wave ◽  
Wave Generation

scholarly journals Piezoelectric Wafer Active Sensors in Lamb Wave-Based Structural Health Monitoring

JOM ◽  
2012 ◽  
Vol 64 (7) ◽  
pp. 814-822 ◽  
Author(s):  
Lingyu Yu ◽  
Victor Giurgiutiu
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Lamb Wave ◽  
Active Sensors ◽  
Structural Health ◽  
Piezoelectric Wafer Active Sensors ◽  
Piezoelectric Wafer

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.

Investigation on piezoelectrically induced Lamb wave generation and propagation

2007 ◽  
Vol 16 (5) ◽  
pp. 1802-1809 ◽  
Author(s):  
S von Ende ◽  
R Lammering
Keyword(s):  
Lamb Wave ◽  
Wave Generation
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