Title :
New Attenuation Predictive Model for Carbon-Based Nanocomposites
Author :
Chua, Matthew ; Chee-Kong Chui
Author_Institution :
Control & Mechantronics Lab., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
The use of carbon nanofibers (CNF) reinforced composites is popular among several industries such as healthcare, aerospace and defense as they have enhanced mechanical and thermal properties. CNF and carbon nanotubes (CNT) in the composites also improve damping and attenuation. We have been investigating its application for scaffold implants in human airways which undergoes vibratory stress and requires weight-sensitive sound proofing. This paper proposes a predictive model for the attenuation of sound waves through the composite that takes into consideration the Rayleigh scattering function, absorption, resonance and interfacial friction of the embedded fibers. These factors are dependent on the size, thickness, density, porosity, Young Modulus and volume fraction of the nanofibers or nanotubes. CNF reinforced poly-di-methyl-siloxane (PDMS) and single-walled CNT reinforced PDMS composites were investigated. Ultrasonic testing and measurement of sound wave attenuations through the material were done to validate the proposed model and results are shown to be consistent.
Keywords :
Rayleigh scattering; Young´s modulus; carbon fibre reinforced plastics; filled polymers; friction; nanocomposites; nanofibres; porosity; single-wall carbon nanotubes; ultrasonic attenuation; ultrasonic materials testing; C; CNF reinforced poly-di-methyl-siloxane composites; Rayleigh scattering function; Young modulus; carbon-based nanocomposites; interfacial friction; nanofibers; nanotubes; porosity; single-walled CNT reinforced PDMS composites; sound wave attenuation measurement; sound wave attenuation predictive model; ultrasonic testing; volume fraction; Acoustics; Attenuation; Computational modeling; Friction; Nanocomposites; Predictive models; Attenuation; attenuation; carbon based nanocomposites; material characterization; material characterization.; modeling;
Journal_Title :
Nanotechnology, IEEE Transactions on
DOI :
10.1109/TNANO.2015.2396536