This paper presents the design, characterization, and application of periodic piezoelectric actuator arrays for structural health monitoring. In the proposed array configuration, all elements are activated simultaneously to achieve strong frequency-dependent directional actuation, which allows beam steering through a sweep of the excitation frequency and limited hardware requirements. The array enables in situ monitoring of critical components through strongly focused actuation and directional scanning capabilities. The concept is illustrated for a selected design with quadrilateral topology on an isotropic plate. The application to composite panels is also specifically discussed by illustrating the complexity of the corresponding dispersion properties, which suggest design challenges for mode tuning. A quadrilateral design is tested for excitation of the mode on a selected lay-up sequence to illustrate the generality of the proposed concept and its applicability to composites.
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e-mail: ruzzene@gatech.edu
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January 2011
Research Papers
Frequency-Steered Acoustic Arrays: Application to Structural Health Monitoring of Composite Plates
Buli Xu,
Buli Xu
School of Aerospace Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
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Matteo Senesi,
Matteo Senesi
School of Aerospace Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
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Massimo Ruzzene
Massimo Ruzzene
School of Aerospace Engineering and School of Mechanical Engineering,
e-mail: ruzzene@gatech.edu
Georgia Institute of Technology
, Atlanta, GA 30332
Search for other works by this author on:
Buli Xu
School of Aerospace Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
Matteo Senesi
School of Aerospace Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
Massimo Ruzzene
School of Aerospace Engineering and School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332e-mail: ruzzene@gatech.edu
J. Eng. Mater. Technol. Jan 2011, 133(1): 011003 (6 pages)
Published Online: November 23, 2010
Article history
Received:
February 5, 2010
Revised:
June 17, 2010
Online:
November 23, 2010
Published:
November 23, 2010
Citation
Xu, B., Senesi, M., and Ruzzene, M. (November 23, 2010). "Frequency-Steered Acoustic Arrays: Application to Structural Health Monitoring of Composite Plates." ASME. J. Eng. Mater. Technol. January 2011; 133(1): 011003. https://doi.org/10.1115/1.4002638
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