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This paper investigates the potential of exploiting interfacial sliding interactions in carbon nanotube
thin films for structural damping applications. Carbon nanotubes, due to their huge effective interfacial
area, may provide an unprecedented opportunity to dramatically improve damping properties with minimal
weight penalty. Three different mechanisms for interfacial friction damping in nanotube films were
identified in this paper. These include: 1) Energy dissipation due to inter-tube interactions, 2) Energy
dissipation due to nanotube-polymer interactions and 3) Energy dissipation due to nanotube and
encapsulated nanowire interactions. These damping mechanisms are investigated using computational
techniques (such as molecular dynamics) as well as experimentation (viscoelastic shear, bending tests). The
results indicate that over 15-fold increase in the material loss factor for an epoxy thin film can be achieved
by the use of carbon nanotube fillers.
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Jonghwan Suhr, Nikhil A. Koratkar, Pulickel M. Ajayan, "Damping characterization of carbon nanotube thin films," Proc. SPIE 5386, Smart Structures and Materials 2004: Damping and Isolation, (29 July 2004); https://doi.org/10.1117/12.532625