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Дата изменения: Wed Jul 10 21:27:37 2002 Дата индексирования: Mon Oct 1 21:30:02 2012 Кодировка: |
Abstract |
Experimental Acoustical Research of
Nonlinear Shear Properties of
Visco-Elastic Materials
B.B.Damdinov, B.B.Badmaev, M.N.Ivanova
(Buryat Scientific Center of Russian Academy of Sciences (Siberian Division),
Ulan-Ude, Russia)
e-mail:
dababa@rambler.ru
Visco-elastic
properties of materials are revealed first of all under shear deformation. In
present work the shear visco-elastic properties of liquids have been
investigated by acoustic resonance method. The liquid was disposed between
piezoquartz crystal oscillated at a resonance frequency and solid cover plate.
The liquid interlayer undergoes a shear deformation. Shear modulus and the
tangent of mechanical loss angle for tested liquids have been measured. The
components of shear complex modulus have been defined from resonance properties
changes of quartz. Thickness of liquid interlayer (1-10 um) was less than shear
wavelength and controlled by optical method. Results obtained have been
considered on the basis of the rheological models. It was shown that experimental
viscosities are above the tabular ones and decrease with shear deformation.
Section
: 3