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Modeling of Carbon Nanotube Actuators: Part I – Modeling and Electrical Properties

German Aerospace Center, Institute of Composite Structures and Adaptive Systems Lilienthalplatz 7, 38108 Braunschweig, Germany

^* To whom correspondence should be addressed.

	Abstract

The outstanding electrical and mechanical properties of single carbon nanotubes (CNT) are the motivation for an intensive research in various fields of application. The actuation effect constitutes the foundation for any application as a multifunctional material and within the field of adaptronics. The effect is in the majority of cases investigated by a CNT configuration of stochastically aligned CNT, so-called bucky-paper, in an electrolytic environment. The article presents an analytical model for a detailed understanding and investigation of the actuation process. The complete description and parameterization of the model is documented in two parts. In the first part the model is developed, the test setup for the model validation and parameter identification is elucidated, and the electrical parameters are determined. In the second part the mechanical system and the actuating effect will be examined. Finally the applicability of the model will be examined.

Key Words: carbon nanotube, CNT actuator, constant phase angle element, electrolytic actuator.

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