20 April 2007 Self-sensing and self-actuation response of carbon nanotube composites
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Changing dielectric properties of an elastically deformed solid material is called dielectrostriction. This physical response enables a concept of self-sensing in dielectric materials such as polymers and polymeric composites. In addition, dielectrostriction response is governed by same material parameters as the electrostriction effect which is suitable for self-actuation applications. Designed planar capacitor sensor is employed for monitoring dielectrostriction effect without mechanical contact with a loaded specimen. Such sensor can also be arranged in a rosette to directly obtain the principal values of the stress/strain and the principal directions. This study investigates dielectrostriction and electrostriction effects in carbon nanotube (CNT) composites. Preliminary results show tenfold increase in dielectrostriction response of nanocomposites having 2 vol. % of randomly distributed CNTs. Current study targets CNT composites having microstructure modified using applied electric field for optimizing sensing and actuation performances.
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Ho Young Lee, Ho Young Lee, Yuri M. Shkel, Yuri M. Shkel, } "Self-sensing and self-actuation response of carbon nanotube composites", Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 65261W (20 April 2007); doi: 10.1117/12.716195; https://doi.org/10.1117/12.716195

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