钛酸钙系电流变液在直流电场下静态剪切的应力响应  

Shear stress response of Ca_2TiO_3 based ER fluid under static shear mode in DC field

作　　者：陈恒[1] 龚兴龙[1] 江川霞[2] 江万权[2] 张忠[3] 

机构地区：[1]中国科学技术大学近代力学系,安徽合肥230027 [2]中国科学技术大学化学系,安徽合肥230026 [3]国家纳米科学中心,北京100080

出　　处：《功能材料》2009年第8期1270-1273,共4页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB936803)

摘　　要：研究了直流电场下钛酸钙系电流变液在静态剪切模式下的力学响应,得到了材料在静态剪切模式下的应力应变关系,讨论了材料温度、电压和剪切应变对应力的影响,以理论推导和实验数据拟合的方法得出了剪切应力与剪切应变、温度以及电场强度等参数的半经验数学关系式。理论值对比实验结果表明,剪切应力表达式与实验结果符合较好,可以用于预测材料在静态剪切模式下的剪切应变,温度和电场强度对剪切应力的影响。In this paper shear stress response of Ca2 TiO3 based electrorheological （ER） fluids in static shear mode under DC fields was investigated and the shear stress-strain curves were obtained. The effects of temperature, electric field strength and shear strain on the shear stress was discussed. By the methods of theory deduction and data fitting, a semi-empirical mathematical expression of shear stress was proposed. The simulation results show a good agreement with the experimental data. It is indicated that the semi- empirical expression can be used in predicting the mechanical behavior of ER fluids in various temperature, electric field strength and shear strain.

关 键 词：电流变液 静态剪切 应力响应 

分 类 号：O37[理学—流体力学] O469[理学—力学]