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Open Access

Intrinsic eigenvibration frequency in the resonant ultrasound spectroscopy: Evidence for a coupling vibration between a sample and transducers

Earth, Planets and Space201454:BF03351729

https://doi.org/10.1186/BF03351729

Received: 22 October 2001

Accepted: 6 June 2002

Published: 20 June 2014

Abstract

The resonant ultrasound spectroscopy enables us to measure elastic constants of various materials with high accuracy. One of its curious features is resonance frequency shift caused by modulation of clamp force for a sample, although its mechanism has not been clarified yet. A coupling vibration model is newly proposed to interpret this phenomenon and predict its functional form. Further, it is confirmed that the resulted functional forms depend on characteristics of each eigenvibration mode. The extrapolation based on those functional forms enables us to correct measured frequency to the intrinsic one with improved accuracy at least by one order of magnitude. Thus the correction is essential in order to obtain accurate derivatives of frequency with respect to temperature, pressure, composition, and so forth.

Keywords

Resonance FrequencyFrequency ShiftElastic Wave VelocityCoupling VibrationResonance Frequency Shift

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