Abstract
Measurements of the elasticity or viscoelasticity of various materials by the vibrating-reed method at very low frequencies require the use of long and heavy samples. The effect of gravity on these samples has been considered theoretically, and new equations for the storage and loss moduli have been derived. Vibrating-reed measurements were carried out with several kinds of materials at frequencies ranging from about 1 to 20 Hz. The experimental results indicate that the above equations are satisfactory in practice.
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Onogi, S., Kondo, T. & Tabata, Y. Measurements of Viscoelasticity by the Vibrating-Reed Method at Very Low Frequencies. Polym J 4, 61–67 (1973). https://doi.org/10.1295/polymj.4.61
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DOI: https://doi.org/10.1295/polymj.4.61