The radiation mode theory in ultrasonics

Declercq, Nico F.; Briers, R.; Leroy, Oswald; Degrieck, Joris; Shkerdin, G. N.

doi:10.1109/tuffc.2005.1503965

Cited by 3 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Earlier a theoretical study carried out by Briers et al [13], confirmed some of the experimental results found by Tinel and Duclos [9]. The study was based on the radiation mode theory [14] that consists of the construction of a set of acoustic modes (radiation modes and eigenmodes) of the solid/liquid system under consideration. Despite of the satisfactory results obtained with this approach, the method remains very cumbersome [13] and is only applicable to solid corners of 90 .…”

Section: Introductionmentioning

confidence: 64%

Scholte–Stoneley waves on an immersed solid dihedral: Generation, propagation and scattering effects

et al. 2014

View full text Add to dashboard Cite

Scholte-Stoneley wave propagation on a dihedral and more precisely the diffraction effects occurring at the corners, has since long been of high importance for nondestructive testing of materials and structures. Experimental investigations have been reported in the past. Simulations based on radiation mode theory have been published before, explaining the only situation for which the model is applicable namely rectangular corners. The current report describes an investigation applying finite element simulations. Results are obtained not only for rectangular corners but for any possible corner angle. The outcome is in agreement with reported experiments. Moreover a critical corner angle is found below and beyond which different diffraction phenomena occur. The study is performed for different isotropic solids.

show abstract

Section: Introductionmentioning

confidence: 64%

Scholte–Stoneley waves on an immersed solid dihedral: Generation, propagation and scattering effects

et al. 2014

View full text Add to dashboard Cite

show abstract

Finite element analysis of transmission of leaky Rayleigh waves at the extremity of a fluid-loaded thick plate

Lamkanfi

Declercq

Paepegem

et al. 2007

Journal of Applied Physics

View full text Add to dashboard Cite

A numerical study based on finite element simulations reveals the experimentally indicated fact [N. F. Declercq et al., J. Appl. Phys. 96, 5836 (2004)] that leaky Rayleigh waves propagating along the horizontal surface of a thick fluid-loaded solid plate are transmitted around the corner of the solid plate. The mentioned experiments are based on the so-called Schoch effect, accompanied by the presence of a null strip in the reflected part of the beam, and phenomena occurring when the incident beam, generating the effect, approaches the edge of the solid plate. The referred experiments indicate that leaky Rayleigh waves are generated around the corner of the plate, but the experimental evidence is not fully conclusive whether the effect is caused merely by incident Rayleigh waves on the upper surface or by scattering effects when the incident beam interacts with the corner. The current study first confirms the reported experiments by means of the finite element method and then proofs that the assumption made in the referred paper about Rayleigh waves, being primarily stimulated by the edge of an incident bounded beam rather than the middle, is correct. Ultimately the model is applied to study leaky Rayleigh waves separately from the incident and reflected bounded beams. It is shown that the Rayleigh waves themselves are the physical origin of the transmission of Rayleigh waves rather than scattering effects caused by the incident bounded beam.

show abstract

Effect of volunteerism as exercise instructor on physical and cognitive function in community-dwelling elderly women

et al. 2013

View full text Add to dashboard Cite

The purpose of this study was to examine whether volunteering as exercise instructors over a continuous period of time affected the physical and cognitive functions of community-dwelling, elderly women. Longitudinal analysis was conducted on data from 18 volunteer leaders (Leader group) aged 65-79 years (69.6 ± 3.9 years) and 18 age-matched survey participants (Control group). We evaluated physical function using 8 physical performance tests along with their standardized total score, and we evaluated cognitive function using the Five Cognitive Function Test. We used two-way ANOVA to examine the effectiveness of engaging in a yearlong volunteer activity and Cohen's d for effect size. There were significant interactions in timed up and go, hand working with pegboard, standardized score of performance tests and the

show abstract

The radiation mode theory in ultrasonics

Cited by 3 publications

References 25 publications

Scholte–Stoneley waves on an immersed solid dihedral: Generation, propagation and scattering effects

Scholte–Stoneley waves on an immersed solid dihedral: Generation, propagation and scattering effects

Finite element analysis of transmission of leaky Rayleigh waves at the extremity of a fluid-loaded thick plate

Effect of volunteerism as exercise instructor on physical and cognitive function in community-dwelling elderly women

Contact Info

Product

Resources

About