NDLI: Effect of coupling media on velocity and attenuation of ultrasonic waves in Brazilian wood

Content Provider	Springer Nature Link
Author	Gonçalves, Raquel Trinca, Alex Julio Santos Ferreira, Gisleiva Cristina
Copyright Year	2011
Abstract	Coupling media are necessary to ensure that transducers bond to wood specimens to minimize coupling losses and improve the accuracy of ultrasonic measurements. There are several types of coupling media available, and the optimal choice is not known. In this work, we analyzed the results of ultrasonic wave attenuation for 0.1-MHz longitudinal and transverse transducers with six different materials as coupling media in nine species of Brazilian wood with densities in the range 700–1170 kg/m3. Tests were performed using constant pressure on the transducer and with wave propagation in the longitudinal direction. For transverse transducers, the polarization was in the radial and tangential directions. The results were analyzed statistically and showed that, for attenuation in both longitudinal and transverse waves, the material used for coupling had significant effects, whereas the wood species had no effect. For longitudinal waves, the statistical evaluation showed that the coupling material performance was strongly dependent on the species of wood, but it was not possible to observe any tendency of behavior associated with specific anatomical properties.
Starting Page	282
Ending Page	287
Page Count	6
File Format	PDF
ISSN	14350211
Journal	Journal of Wood Science
Volume Number	57
Issue Number	4
e-ISSN	16114663
Language	English
Publisher	Springer Japan
Publisher Date	2011-05-21
Publisher Place	Japan
Access Restriction	Subscribed
Subject Keyword	Nondestructive testing Nondestructive evaluation Longitudinal waves Transverse waves Wood Science & Technology Materials Science Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Biomaterials Forestry

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