Chapter
Apr 26, 2012
Strain Sensing Using Multiwalled Carbon Nanotube Film Subjected to Temperature Variation
Authors: S. M. Vemuru [email protected], S. Nagarajaiah [email protected], and P. M. Ajayan [email protected]Author Affiliations
Publication: Earth and Space 2010: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract
In this study, the real time strain response of the Multiwalled Carbon Nanotube (MWCNT) film is studied at macroscale experimentally. The response of the MWCNT film to temperature changes is also presented in the study. The MWCNT film is attached to a brass specimen using vacuum bonding, and the brass specimen is subjected to tensile load and voltage output from MWCNT film is obtained using four-point probe and a sensitive voltage measurement device. Experimental results demonstrate a linear relationship between change in voltage across the film and change in strain in the brass specimen when subjected to tensile load. The MWCNT film also exhibited excellent reversible electromechanical characteristics when the specimen was unloaded. The response of the MWCNT film to temperature is also studied and it is observed that the resistance of the MWCNT film decreased upon heating. The MWCNT film exhibited a stable and linear voltage response to changes in temperature. The experimental results demonstrate the effectiveness of Multiwalled carbon nanotubes in strain sensing as well as the effect of temperature on the MWCNT film.
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© 2010 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Department of Civil & Environmental Engineering, Rice University, 6100 Main Street, Houston, TX-77005. E-mail: [email protected]
Department of Civil & Environmental Engineering and Mechanical Engineering & Material Science, Rice University, 6100 Main Street, Houston, TX-77005. E-mail: [email protected]
Department of Mechanical Engineering & Material Science, Rice University, 6100 Main Street, Houston, TX-77005. E-mail: [email protected]
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