摘要
对磁流变液在不同直流电流作用下的准静态挤压过程进行了实验研究。建立了用于测试磁流变液挤压模式下力学特性的实验装置,并通过ANSYS/Multiphysics对此实验装置磁路的磁感应强度分布进行了仿真分析。测试了压应力和压缩弹性模量各自随压应变的变化曲线。实验结果表明:压应力与压应变、外加电流大小和磁流变液本身的性能都有密切的关系。压应力与压应变、压缩弹性模量与压应变的曲线可以划分为3个不同的区域。在第1区域压应变小于0.025时,压应力和压缩弹性模量随压应变的增加而迅速增加;在第2区域压应力与压应变的曲线斜率近乎为零,而压缩弹性模量却随压应变的增大而下降,在压应变约为0.15时降到最低。随后在压应变大于0.15时压应力和压缩弹性模量与压应变显示为指数关系。
Quasi-static squeezing process of MR fluids under different magnitudes of DC electrical current was investigated. An experiment setup was designed and fabricated to test the compression characteristics and the magnetic behavior of the equipment was analyzed using ANSYS/Muhiphysics software. The curves of compressive stress vs compressive strain, compressive modulus vs compressive strain were measured under different applied currents. Experiment resuhs show that the curves can be divided into three different regions. In the first region, the compressive stress and compressive modulus increase as the compressive strain increases when the strain is lower than 0. 025. In the second region, the compressive stress keeps nearly constant, but the compressive modulus decreases and reaches to the lowest value when the compressive strain reaches to about 0.15. And then the compressive stress and the compressive modulus show an exponential relationship with the compressive strain while the strain is higher than 0.15.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2009年第4期848-851,共4页
Chinese Journal of Scientific Instrument
基金
浙江省科技攻关重点项目(2006C21067)
浙江省教育厅科研项目(Y200805416)资助
关键词
磁流变液
挤压模式
压应力
MR fluid
compression mode
compressive stress
