【作者】 陈朋； 白先旭； 钱立军；

【Author】 PENG Chen;XIANXU Bai;LIJUN Qian;Laboratory for Adaptive Structure and Intelligent Systems (LASIS), Department of Vehicle Engineering,Hefei University of Technology;

【机构】 自适应结构与智能系统实验室合肥工业大学车辆工程系；

【摘要】 在挤压模式下,磁流变液(Magnetorheological fluid,MRF)表现出复杂多变的力学特性。本文通过变更准静态位移激励速度或正弦位移激励频率,试验探究了不同激励速度下MRF压缩和拉伸力学特性的变化趋势。法向应力随挤压间隙变化的试验曲线结果表明:随着激励速度的增加,MRF拉伸应力不断增加并趋于稳定,而MRF压缩应力却不断减小再趋于稳定;同时,试验结果在对数坐标图中的斜率变化趋势表明位移激励速度对MRF压缩和拉伸力学特性的影响方式是不同的。最终,试验结果明确了颗粒与均匀流体间流体动力学相互作用对MRF宏观力学特性的影响是不可忽略的。更多还原

【Abstract】 In squeeze mode, magnetorheological fluid(MRF) presents a complicate behavior. By altering the displacement exciting velocity or exciting frequency, the behavior of MRF under different exciting velocities will be experimentally tested. The test results in terms normal stress versus gap distance show that, along with the exciting velocity, the tensile stress shows an increasing tendency before a saturation, while the compressive stress presents a decreasing tendency. Moreover, the test results in log-log plots indicate that the effects of the exciting velocity on the property in compression and tension are different. Finally, for the analysis of the behavior of MRF in squeeze mode, the hydrodynamic interaction between the particles and continuous phase must be considered.更多还原