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Published December 6, 2004 | Published
Journal Article Open

Highly nonlinear contact interaction and dynamic energy dissipation by forest of carbon nanotubes


Mechanical response and energy dissipation of an array of carbon nanotubes under high-strain rate deformation was studied using a simple drop-ball test with the measurement of the dynamic force between the ball and forest of nanotubes. This convenient process allows extracting forceā€“displacement curves and evaluating dissipated energy by the nanotubes. The contact force exhibits a strongly nonlinear dependence on displacement being fundamentally different than the Hertz law. The forest of vertically aligned nanotubes may be used as a strongly nonlinear spring in discrete systems for monitoring signal propagation speed, and as a microstructure for localized energy absorption.

Additional Information

Ā©2004 American Institute of Physics. (Received 2 August 2004; accepted 6 October 2004) This work was supported by the NSF (Grant No. DCMS03013220). The authors wish to thank Dr. L. H. Chen and J. AuBuchon at UC San Diego for help.

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