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Journal of Intelligent Material Systems and Structures
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Induced Strain of Actuation of Surface Bonded Piezoceramic Patches: A Numerical and Experimental Study

David H. Mollenhauer

Structural Materials Branch (WL/MLBC) Materials Directorate Wright-Patterson Air Force Base OH 45433-7750

O. Hayden Griffin, Jr

Department of Engineering Science and Mechanics Virginia Polytechnic Institute and State University Blacksburg, VA 24061

The induced strain of actuation of surface bonded piezoceramic patches was ex amined using numerical and experimental techniques. Specifically, a commercially available finite element package was used to examine these induced strains. The piezoceramic patches were actuated in the model via a specified thermal expansion or contraction dependent on the free e-field/strain re sponse of the piezoceramic patches. Moiré interferometry was used to examine the induced strains on the plate surface near-to and far-from a patch edge. These experimental results compare favorably with the numerical results, indicating that the numerical approach is a valid analysis technique. Results indicate relatively large in-plane and out-of-plane tensile stresses as well as large shear stresses in the regions surrounding a patch edge. These large stresses are not statically significant but will likely cause long term fatigue problems.

Journal of Intelligent Material Systems and Structures, Vol. 5, No. 3, 355-362 (1994)
DOI: 10.1177/1045389X9400500308
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A. G. Littlefield, J. A. Fairweather, and K. C. Craig
Use of FEA Derived Impedances to Design Active Structures
Journal of Intelligent Material Systems and Structures, June 1, 2002; 13(6): 377 - 388.
[Abstract] [PDF]