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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 Ca₂TiO₃ based ER fluid under static shear mode in DC field

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【Author】 CHEN Heng1,GONG Xing-long1,JIANG Chuan-xia2,JAING Wan-quan2,ZHANG Zhong3(1.CAS Key Laboratory of Mechanical Behavior and Design of Materials,Department of Modern Mechanics,University of Science and Technology of China,Hefei 230027,China;2.Department of Chemistry,University of Science and Technology of China,Hefei 230026,Cina;3.National Center for Nanoscience and Technology(NCNST) of China,Beijing 100080,China)

【机构】中国科学技术大学近代力学系；中国科学技术大学化学系；国家纳米科学中心；

【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。更多还原

【Abstract】 In this paper shear stress response of Ca2TiO3 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.更多还原