Тип публикации: статья из журнала
Год издания: 2006
Ключевые слова: shear elasticity, liquid, acoustic method, shear wave, nonlinearity
Аннотация: The visco-elastic properties of liquids have been investigated using acoustical resonance method. Piezoquatrz performed tangential oscillations on the main resonance frequency of 74 kHz contacts by the one end of horizontal surface with the studied liquid layer covered by quartz cover-plate. So the stagnant shear waves are installeПоказать полностьюd in layer. The solution of interaction of piezoquartz-liquid layer cover-plate gives three methods of determination of the real shear modulus (G) and the tangent of mechanical loss angle (tan theta) of liquid. The. first method is realized at smaller thickness of liquid layer then the length of shear wave. Liquids of different classes have been studied using this method: polymer liquids, oils, glycols and alcohols. The second method is connected with the propagation of shear wave in liquid layer, parameters of which are determined the G and tan theta. And the third method is based on the determination of limit shift of resonance frequencies at completes damping of shear wave in thick layer of liquid. All these three methods give satisfactory agreement of results.
Журнал: Ultrasonics
Выпуск журнала: Vol. 44
Номера страниц: 1491-1494