Shear Performance of Magnetorheological Fluid of Carbonyl Iron Powder in Magnetic Field
摘 要
使用流变仪在不同磁感应强度(0~0.86 T)、不同剪切速率(100~1 000 s-1)下测得羰基铁粉磁流变液的剪切应力和表观黏度, 分析了其剪切性能, 并通过拟合得到了剪切应力和磁感应强度的定量关系。结果表明: 在相同的磁感应强度下, 随着剪切速率的增加, 该磁流变液的剪切应力缓慢增大, 表观黏度成指数下降; 该磁流变液的黏度变化符合Herschel-Bulkley模型, 磁感应强度越大, 其剪切稀化效应越明显; 当磁感应强度分别在0~0.23 T, 0.45~0.65 T范围内时, 剪切应力和磁感应强度之间均存在指数关系, 指数值分别为1.50, 0.57, 当磁感应强度在0.23~0.45 T范围内时, 剪切应力随磁感应强度的增加呈线性增大。
Abstract
The shear stresses and apparent viscosities of the magnetorheological fluid (MRF) of carbonyl iron powder were measured by the rheometer under different magnetic flux densities (0-0.86 T) and different shear rates (100-1 000 s-1). The shear performance of the MRF was analyzed and the quantitative relations between shear stress and magnetic flux density were fitted. The results show that the shear stress of the MRF increased slowly but the apparent viscosity decreased exponentially with the increase of the shear rate under the same magnetic flux density. The viscosity change of the MRF coincided well with the Herschel-Bulkley model, meaning that the larger the magnetic flux density, the stronger the shear thinning effect of the MRF. When the magnetic flux densities were in the range of 0-0.23 T and 0.45-0.65 T, the shear stress and magnetic flux density showed an exponential relationship and the index value was 1.50 and 0.57 respectively. While in the range of 0.23-0.45 T, the shear stress increased linearly with the increase of magnetic flux density.
中图分类号 TM271 DOI 10.11973/jxgccl201608003
所属栏目
基金项目 山东省自然科学基金资助项目(ZR2011EEM005); 青岛经济技术开发区重点科技发展计划资助项目(2013-1-67)
收稿日期 2016/2/29
修改稿日期 2016/6/5
网络出版日期
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备注肖林京(1966-), 男, 山东临沂人, 教授, 博士。
引用该论文: XIAO Lin-jing,WANG Chuan-ping,ZHU Xu-li,WEI Jie,SUN Zhao-yang. Shear Performance of Magnetorheological Fluid of Carbonyl Iron Powder in Magnetic Field[J]. Materials for mechancial engineering, 2016, 40(8): 12~15
肖林京,王传萍,朱绪力,卫 洁,孙朝阳. 磁场作用下羰基铁粉磁流变液的剪切特性[J]. 机械工程材料, 2016, 40(8): 12~15
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【6】李敬民, 晁月盛, 周丹晨, 等. 利用氧化铁皮制备还原铁粉磁流变液[J]. 机械工程材料,2010, 34(10): 46-49.
【7】姚金光,晏华. 稳定型硅油基磁流变液的制备及性能[J]. 机械工程材料,2010,34(11): 65-67.
【8】KIM P, LEE J I, SEOK J. Analysis of a viscoplastic flow with field-dependent yield stress and wall slip boundary conditions for a magnetorheological (MR) fluid[J]. Journal of Non-Newtonian Fluid Mechanics, 2014, 204(1): 72-86.
【9】易成建.磁流变液: 制备、性能测试与本构模型[D].重庆: 重庆大学, 2011: 22-28.
【10】赵春伟. 基于微结构的磁流变液力学性能研究[D]. 重庆: 重庆大学,2014: 30-40.
【11】STERNBERG A, ZEMP R, LLERA J C. Multiphysics behavior of a magneto-rheological damper and experimental validation[J]. Engineering Structures, 2014, 69: 194-205.
【12】郭朝阳.磁流变液法向力及减振器研究[D].合肥: 中国科学技术大学, 2013: 25-29.
【13】祝长春. 磁流变液剪切应力的理论研究[D]. 武汉: 武汉理工大学,2004: 23-27.
【14】朱绪力, 孟永钢, 田煜. 磁流变弹性体中颗粒磁场力的简化分析模型[J].功能材料, 2010,41(10): 1712-1715.
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