Ultrasonic velocity and amplitude characterization of magnetorheological fluids under magnetic fields

被引：26
|
作者：
Rodriguez-Lopez, J. [1 ]
Elvira Segura, L. [1 ]
de Espinosa Freijo, F. Montero [1 ]
机构：
[1] UPM CSIC, Ctr Acust Aplicada & Ensayos Destruct, Madrid 28006, Spain
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 02期
关键词：
Magnetorheological fluid; Ultrasonic velocity; Ultrasonic attenuation; Anisotropic microstructure; VISCOELASTIC PROPERTIES; SOUND-PROPAGATION; RHEOLOGICAL FLUID; DEVICES; SUSPENSIONS; PHASE;
D O I：
10.1016/j.jmmm.2011.08.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Variations in velocity of sound and amplitude of the signal of a commercial magnetorheological fluid under different magnetic fields are studied experimentally. Different factors such as orientation, uniformity, geometry and intensity of the magnetic field are investigated. An increase in the change of MR fluid acoustical properties is obtained when the magnetic field intensity is risen. In addition, these properties show an opposite behavior when a magnetic field is applied parallel or perpendicular to the ultrasound propagation. Experiments using an electromagnet and permanent magnets as the source of magnetic field are also compared. Properties such as anisotropy in sound velocity and amplitude make these materials interesting regarding applications. (c) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：222 / 230
页数：9
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