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23 July 1993 Piezoelectric tubes and 1-3-type tubular composites as tunable actuators and sensors
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Piezoelectric actuators and sensors made of tubular structure can provide a great agility of the effective response in the radial direction. For a radially poled piezoelectric tube, the effective piezoelectric constant in that direction can be tuned to be positive, zero, and negative by varying the ratio of the outer radius (R0) to the inner radius (r0) of the tube. For a suitable ratio of R0/r0, this effective constant can also be changed in sign or set to zero by adjusting the dc bias field level for tubes made of electrostrictive materials. Therefore, one can make a piezoelectric transducer with all the effective piezoelectric tensile constants having the same sign. The end capped thin wall tubes also exhibit exceptionally high hydrostatic response and the small size of the tubular structure makes it very suitable for integration into 1 - 3 composite which possesses low acoustic impedance and high hydrostatic response.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Qi Ming Zhang, Hong Wang, and Leslie Eric Cross "Piezoelectric tubes and 1-3-type tubular composites as tunable actuators and sensors", Proc. SPIE 1916, Smart Structures and Materials 1993: Smart Materials, (23 July 1993);

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