Study of Lamb Waves for Non-Destructive Testing Behind Screens

Kauffmann, Pierre; Ploix, Marie-Aude; Chaix, Jean François; Gueudré, Cécile; Corneloup, Gilles; Baqué, F.

doi:10.1051/epjconf/201817003005

Cited by 3 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The angle incidence technique is widely used to generate leaky Lamb waves in an immersed plate: the targeted leaky Lamb mode is selected by the incidence of an acoustic beam generated by an immersed transducer or through an immersed wedge (Alleyne and Cawley, 1992a;Bertoni and Tamir, 1973;Kauffmann et al, 2018b;Nayfeh, 1995;Takiy et al, 2017;Viktorov, 2013;Wilcox et al, 2001b;Xu and Hu, 2017). It has been shown by Wilcox et al (2001a) that some leaky Lamb modes are more excitable than others with this technique.…”

Section: Introductionmentioning

confidence: 99%

Multi-modal leaky Lamb waves in two parallel and immersed plates: Theoretical considerations, simulations, and measurements

Kauffmann

Ploix

Chaix

et al. 2019

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

Leaky Lamb waves have the potential to be used to perform non-destructive testing on a set of several parallel and immersed plates. Short-time Fourier transform and two-dimensional Fourier transform have both been successfully used to measure the propagation properties: phase and group velocity, and leaky attenuation. Experimental measurements were validated by comparison between theory, experimentation and finite-element simulations (using COMSOL MULTIPHYSICS V R software) in the case of one immersed plate in water. These signal processing techniques proved to be efficient in the case of multi-modal propagation. They were applied to two immersed plates to identify the leaky Lamb mode generated in the second plate. Dispersion curves of the system composed by two immersed and parallel plates are computed. When plates have the same thickness, leaky Lamb modes propagate from the first to the second plate without any mode change, with the apparent attenuation being weaker in the second plate. Considering that the second plate is continuously supplied in energy by the first one, an energy-based model is proposed herein to estimate the apparent attenuation in the second plate. Despite our extremely simplifying assumption, this model proved to be in good agreement with both finite-element modelling and experimentation.

show abstract

Section: Introductionmentioning

confidence: 99%

Multi-modal leaky Lamb waves in two parallel and immersed plates: Theoretical considerations, simulations, and measurements

Kauffmann

Ploix

Chaix

et al. 2019

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

“…The electro-elastic properties and the piezoelectric vibration modes of the α-BIBO and BZBO crystals are worth studying further. For example, the radial extensional and face shear vibration modes are useful for exploring new acoustic wave devices based on the lamb waves and guided waves [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Bismuth-Based Oxyborate Piezoelectric Crystals: Growth and Electro-Elastic Properties

Chen

Cheng

et al. 2019

Crystals

View full text Add to dashboard Cite

The non-centrosymmetric bismuth-based oxyborate crystals have been extensively studied for non-linear optical, opto-electric and piezoelectric applications. In this work, single crystal growth and electro-elastic properties of α-BiB 3 O 6 (α-BIBO) and Bi 2 ZnB 2 O 7 (BZBO) crystals are reported. Centimeter-sized α-BIBO and BZBO crystals were grown by using the Kyropoulos method. High resolution X-ray diffraction tests were performed to assess the crystal quality. The full-width at half-maximum values (FWHM) of the rocking curves were evaluated to be 35.35 arcsec and 47.85 arcsec for α-BIBO and BZBO samples, respectively. Moreover, the electro-elastic properties of α-BIBO and BZBO crystals are discussed and summarized, based on which the radial extensional and the face shear vibration modes were studied for potential acoustic device applications. The radial extensional mode electro-mechanical coupling factors k p were evaluated and found to be 32.0% and 5.5% for α-BIBO and BZBO crystals, respectively. The optimal crystal cuts with face shear mode were designed and found to be (YZt)/−53 • (or (YZt)/37 • cut) for α-BIBO crystal, and (ZXt)/±45 • cut for BZBO crystal, with the largest effective piezoelectric coefficients being in the order of 14.8 pC/N and 8.9 pC/N, respectively.

show abstract

Experimental Method for Simultaneous Determination of the Lamb Wave A0 Modes Group and Phase Velocities

Tumšys

2022

Materials

View full text Add to dashboard Cite

Determining Lamb wave dispersion curves when measuring phase and group velocity values at a fixed frequency is now a common and relevant task. In most cases, in order to solve such a problem, it is necessary to know the exact properties of the material, particularly its thickness. In experimental methods, Lamb wave parameters are evaluated directly from the test materials. This paper proposes a new and simple experimental algorithm for A0 mode group and phase velocity determination based on signal filtering and zero-crossing estimating. The main idea is to capture the zero-crossing instances of the signals closest to the signal envelope peaks and use these time instances to determine the phase and group velocities. The reliability of the proposed method was evaluated using simulated and experimental signals propagating in an aluminum plate. Theoretical modeling has shown that the proposed method enables the calculation of the A0 mode group and phase velocities with a mean relative error of less than 0.7%. An accuracy of 0.8% was observed during the experimental measurements.

show abstract

Study of Lamb Waves for Non-Destructive Testing Behind Screens

Cited by 3 publications

References 15 publications

Multi-modal leaky Lamb waves in two parallel and immersed plates: Theoretical considerations, simulations, and measurements

Multi-modal leaky Lamb waves in two parallel and immersed plates: Theoretical considerations, simulations, and measurements

Bismuth-Based Oxyborate Piezoelectric Crystals: Growth and Electro-Elastic Properties

Experimental Method for Simultaneous Determination of the Lamb Wave A0 Modes Group and Phase Velocities

Contact Info

Product

Resources

About