摘要
以微观试验和流变性能试验为手段,分别研究零电场下和在电场作用下的电流变液体黏性变化规律.研究结果表明:零电场下电流变液体的黏性与Krieger-Dougherty公式具有很好的拟合效果,其中逾渗临界值强依赖于悬浮液体中固体颗粒的性质并随工作温度变化.在电场作用下,电流变悬浮液体的黏度随剪切速率的变化规律分为3个阶段:即呈线性的启动段、非线性的幂定律模型流动段和宾汉模型流动段.研究结果为电流变效应工程应用提供依据.
The variation of viscosity of electrorheolog-ical suspensions (ERSs) with shear rates is investigated under different temperatures and without electrical fields by microstructural and rheological experiment. The results show that the values of viscosity under zero electrical field agree well with Krieger-Dougherty model and the values of percolation threshold depend mainly on the characteristics of particles and decrease with working temperatures. The variations are different in three stages of linear startup, non-linear power law mode and Bingham mode flowing when electrorhrological suspensions are exposed to an electrical field.
出处
《力学与实践》
CSCD
北大核心
2004年第6期34-37,共4页
Mechanics in Engineering
基金
国家自然科学基金(59872005)
福建省高教厅科研基金(K02020)
福州大学科技基金(2002-XQ-15)项目资助.
