English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/4913
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Longitudinal and Shear Wave Propagation in Silica Aerogels at Ultrasonic Frequencies

AuthorsGómez Álvarez-Arenas, Tomás
Viscoelastic properties
Ultrasonic frequencies
Piezoelectric transducers
Longitudinal waves
Shear waves
Velocity of propagation
Issue DateSep-2002
PublisherSociedad Española de Acústica
CitationForum Acusticum. Sevilla, sep. 2002
AbstractIn this work, the possibility to use a technique based on the analysis of thickness resonances of air-surrounded aerogel plates at ultrasonic frequencies to obtain its viscoelastic properties is investigated. These resonances were excited and sensed by airborne ultrasonic waves. To this purpose, specially designed air-coupled, high-sensitivity and broad-band piezoelectric transducers were used. Precise and simultaneous measurements of velocity and attenuation of longitudinal and shear waves at different frequencies as well as aerogel density were obtained. It allowed to afford for the first time, a full characterisation of the viscoeleastic properties of these materials at ultrasonic frequencies.
DescriptionPACS Reference: 43.35.Cg, 43.35.Mr, 43.35.Yb, 43.20.Ks
Appears in Collections:(IA) Comunicaciones congresos
Files in This Item:
File Description SizeFormat 
Propagation_in_Silica.pdf93,81 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.