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Proceedings Paper

Modeling of carbon nanotube composites for vibration damping
Author(s): R. L. Dai; W. H. Liao
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Paper Abstract

In recent years, it has been found that the composites of carbon nanotubes (CNTs) and epoxy resin could greatly enhance damping ability while the stiffness is kept at a very high level. In this research, carbon nanotube enhanced epoxy resin is fabricated. The dynamic properties of the nanotube composites are experimentally studied. Experimental results show that CNT additive can provide the composite with significant damping without undergoing large shear strain as compared to the VEMs, and the dynamic stiffness of the nanotube composite could be even higher than that of the pure epoxy resin. In order to further study the damping mechanism of the CNT composite, models are developed. Composite unit cell model containing single CNT segment is built by using finite element method (FEM). Models with different CNT orientations are solved in order to describe the behaviors of the randomly oriented CNTs inside the epoxy matrix. Composite loss factor is calculated based on average ratio of the unit cell energy loss to the unit cell energy input. Calculated loss factors under different strain level are compared with experiment results.

Paper Details

Date Published: 11 April 2007
PDF: 10 pages
Proc. SPIE 6528, Nanosensors, Microsensors, and Biosensors and Systems 2007, 652809 (11 April 2007); doi: 10.1117/12.716019
Show Author Affiliations
R. L. Dai, The Chinese Univ. of Hong Kong (Hong Kong China)
W. H. Liao, The Chinese Univ. of Hong Kong (Hong Kong China)

Published in SPIE Proceedings Vol. 6528:
Nanosensors, Microsensors, and Biosensors and Systems 2007
Vijay K. Varadan, Editor(s)

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