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Non-Uniform Thickness Electroactive DeviceAn electroactive device comprises at least two layers of material, wherein at least one layer is an electroactive material and wherein at least one layer is of non-uniform thickness. The device can be produced in various sizes, ranging from large structural actuators to microscale or nanoscale devices. The applied voltage to the device in combination with the non-uniform thickness of at least one of the layers (electroactive and/or non-electroactive) controls the contour of the actuated device. The effective electric field is a mathematical function of the local layer thickness. Therefore, the local strain and the local bending/ torsion curvature are also a mathematical function of the local thickness. Hence the thinnest portion of the actuator offers the largest bending and/or torsion response. Tailoring of the layer thicknesses can enable complex motions to be achieved.
Document ID
20060017033
Acquisition Source
Headquarters
Document Type
Other - Patent
Authors
Su, Ji (NASA Langley Research Center Hampton, VA, United States)
Harrison, Joycelyn S. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 23, 2013
Publication Date
March 21, 2006
Subject Category
Electronics And Electrical Engineering
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-7,015,624|NASA-Case-LAR-16039-1
Patent Application
US-Patent-Appl-SN-161113|US-Patent-Appl-SN-696526

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