Abstract
A previous article [Moffett et al., J. Acoust. Soc. Am. 89, 1448–1455 (1991)], comparing the radiated-power limitations of Terfenol-D and PZT-4, is revisited. When the power at resonance is stress-limited (as is the case for high mechanical quality factor Q), the maximum allowable stress amplitude Tmax is the compressive prestress value, so that tension in the Terfenol-D is avoided. When this value is chosen for Tmax, rather than the smaller Tmax’s of the previous article, Terfenol-D is shown to be superior to PZT-4 in power capability at all values of the quality factor Q.
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