STUDIES ON THE STEADY-SHEAR BEHAVIOR OF ELECTRORHEOLOGICAL SUSPENSIONS
STUDIES ON THE STEADY-SHEAR BEHAVIOR OF ELECTRORHEOLOGICAL SUSPENSIONS
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DOI：
10.1021/la00091a003
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发表时间：
1990-01-01
期刊：
影响因子：
3.9
通讯作者：
ZUKOSKI, CF
中科院分区：
文献类型：
--
作者：
KLINGENBERG, DJ;ZUKOSKI, CF
描述了电场和连续剪切作用下非水悬浮体的结构。基于在电场作用下形成的颗粒束和颗粒柱在小剪切应变下表现为弹性固体，但在临界应变以上屈服的观察，建立了这些电流变悬浮液的屈服应力和连续剪切响应模型。模型计算与实验结果的比较表明，屈服应力主要取决于克服电致粒间力所需的功。这些悬浮液的连续剪切响应可以理解为随着剪切速率的提高，类固体粒子质量的逐渐降解。建立了包含这些概念的连续介质模型，并与连续剪切数据进行了比较，结果表明，将悬浮响应视为零剪切速率和高剪切速率、零场强区域行为的总和，可以建立一个优良的电流变悬浮流模型。
The structures of nonaqueous suspensions subjected to electrical fields and continuous shear are described. Based on observations that particle strands and columns formed upon application of an electric field behave as elastic solids for small shear strains but yield above a critical strain, models for the yield stress and continuous-shear response of these electrorheological (ER) suspensions are developed. Comparison of model calculations with experimental results indicates that the yield stress is dominated by the work required to overcome electrically induced interparticle forces. The continuous-shear response of these suspensions can be understood in terms of the gradual degradation of solid-like masses of particles as the shear rate is raised. A continuum model incorporating these concepts is developed, and a compar-ison with continuous shear data shows an excellent model of ER suspension flow can be developed by considering suspension response as a sum of the behaviors in the zero shear rate and in the high shear rate, zero field strength regions.