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Effects of circumferential stress on tangentially polarized piezoelectric cylinders
Eric K Aikins1, Boris S Aronov2, David A Brown1
1University of Massachusetts Dartmouth, ECE Dept., 285 Old Westport Road, North Dartmouth, Massachusetts 02747, USA.
Abstract:
This paper investigates the dependence of the electromechanical properties of the tangential polarized (stripe-electroded) cylindrical piezoelements made of the hard (PZT-4 like) and soft (PZT-5A like) ceramics on the compressive circumferential stress produced by hydrostatic pressure. Results are presented for the relative change of the effective dielectric constants, elastic constants, coupling coefficients, and piezoelectric moduli. The sensitivity of dielectric constant and piezoelectric modulus to the compressive stress is shown to be less than radially polarized ceramic.
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