In this paper, a nonlinear theory applicable to the design of nanotube based devices is presented. The role of finite kinematics for a doubly clamped nanotube device is investigated. In particular, we analyze the continuous deformation and instability (pull in) of a clamped-clamped nanotube suspended over an electrode from which a potential differential is imposed. The transformation of an applied voltage into a nanomechanical deformation indeed represents a key step toward the design of innovative nanodevices. Likewise, accurate prediction of pull-in/pull-out voltages is highly needed. We show that an energy-based method can be conveniently used to predict the structural behavior and instability corresponding to the ON/OFF states of the device at the so-called pull-in voltage. The analysis reveals that finite kinematics effects can result in a significant increase of the pull-in voltage. This increase results from a ropelike behavior of the nanotube as a consequence of the stretching imposed by the actuation.
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Article
Analysis of Doubly Clamped Nanotube Devices in the Finite Deformation Regime
N. Pugno,
N. Pugno
Department of Mechanical Engineering, Northwestern University
, Evanston, IL 60208-3111
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C. H. Ke,
C. H. Ke
Department of Mechanical Engineering, Northwestern University
, Evanston, IL 60208-3111
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H. D. Espinosa
e-mail: espinosa@northwestern.edu
H. D. Espinosa
Department of Mechanical Engineering, Northwestern University
, Evanston, IL 60208-3111
Search for other works by this author on:
N. Pugno
Department of Mechanical Engineering, Northwestern University
, Evanston, IL 60208-3111
C. H. Ke
Department of Mechanical Engineering, Northwestern University
, Evanston, IL 60208-3111
H. D. Espinosa
Department of Mechanical Engineering, Northwestern University
, Evanston, IL 60208-3111e-mail: espinosa@northwestern.edu
J. Appl. Mech. May 2005, 72(3): 445-449 (5 pages)
Published Online: September 23, 2004
Article history
Received:
August 23, 2004
Revised:
September 23, 2004
Citation
Pugno, N., Ke, C. H., and Espinosa, H. D. (September 23, 2004). "Analysis of Doubly Clamped Nanotube Devices in the Finite Deformation Regime." ASME. J. Appl. Mech. May 2005; 72(3): 445–449. https://doi.org/10.1115/1.1875452
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