High-Frequency Viscoelastic Vibrator.
OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C
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The invention relates to vibratory apparatus for the purpose of measuring relevant and significant materials properties through a wide range of frequency and temperature such as the investigation of the behavior of viscoelastic materials under high-frequency excitation. An object of the invention is a high-frequency viscoelastic vibrator for obtaining meaningful data on the high-frequency properties and behavior of viscoelastic substances. Specifically, the apparatus of the invention permits taking such data sufficient to characterize the volumetric dilational and shear distortional spectral tensor operators which relate to stress, stress rate, and higher derivates of stress to the strain, strain rate, and higher derivates of strain under general states of stress for viscoelastic materials in the frequency range of a few hundred Hertz to upwards of 50 kiloHertz.
- Test Facilities, Equipment and Methods