磁场作用下磁流变液结构演化的实验研究  

Experimental Research on the Structure Evolvement of Magnetroreological Fluids under the Influence of Magnetic Field

作　　者：周刚毅[1] 金昀[1] 向勇 张培强[1] 

机构地区：[1]中国科学技术大学力学与机械工程系,安徽合肥230027

出　　处：《实验力学》2000年第2期233-239,共7页Journal of Experimental Mechanics

基　　金：国家自然科学基金!( No.1 9772 0 4 9);国家自然科学基金!重点(No.1 983 4 0 2 0 )资助

摘　　要：本文显微观察了工程应用中使用的高体积比磁流变液在磁场作用下的结构演化过程 .实验结果指出 :工程应用中高体积比浓度的磁流变液在磁场作用下将形成一种复杂的三维结构 ,铁磁颗粒与母液油将一起形成空间结构 ,在形成的类固体物质内部将含有大量的裂纹等缺陷 ,在磁场的作用下内部的缺陷将扩展 .Under the influence of magnetic field, the structure evolvement of magnetroreological fluids (MRF) is observed and described.The observation shows that, for the MRF sample with high volume fraction of particles, a kind of complicated three dimensional structure composed of iron particles and oil may be formed under the action of magnetic field. It is also found that there are plenty of defects, such as cracks, exist in the structure, and the defects will expand with the increasing of intensity of magnetic field. These facts are useful for explaining the mechanical behaviors of MRF.

关 键 词：磁流变液 结构演化 磁场 

分 类 号：O373[理学—流体力学]