We present an enhancement of the resonant ultrasound spectroscopy method for the determination of elastic and viscoelastic properties. By using shear transducers rather than the usual compressional ones, signal strength for the fundamental is enhanced by one to three orders of magnitude. This enables simplified determination of shear modulus and damping tan δ with off-the-shelf electronics. Moreover, the polarization of the shear transducers can be used to identify modes of vibration.
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Wang et al. (2003) studied this question.
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