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The wave propagation in a piezoelectric hollow cylinder of class (6-mm) crystals or ceramics (∞ m) with traction-free surfaces is studied. The frequency equations are obtained subject to various types of electrical boundary conditions and are examined numerically for the piezoceramic material PZT-4; the results are presented graphically as well as in tables.
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Paul et al. (1987) studied this question.
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