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Anisotropic Actuation with Piezoelectric Fiber Composites

Nesbitt W. Hagood

John P. Rodgers

Space Engineering Research Center, Massachusetts Institute of Technology, Cambridge, MA 02139

An investigation was made into the field of planar structural actuation with anisotropic active materials. The mechanisms for creating anisotropic actuators were discussed, and the impact of anisotropy was shown at the individual lamina level and at the laminated structure level. Models for laminated structures were developed using an augmented Classical Laminated Plate Theory incorporating induced stress terms to accommodate anisotropic actuator materials. A twistextension coupled laminate was used to exemplify how twist can be directly induced into isotropic host structures using anisotropic actuation. Four anisotropic actuators with different material anisotropies were compared using this example. Finally, a laminate incorporating piezoelectric fiber composite actuators was manufactured and tested. Excellent agreement was found between the predicted and experimental response.

Journal of Intelligent Material Systems and Structures, Vol. 6, No. 3, 338-349 (1995)
DOI: 10.1177/1045389X9500600305


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