【摘要】 从理论上分析了挤压流动形式 ,得出在电压一定的条件下 ,随着挤压过程的进行 ,流动区域间隙的改变 ,使得电场强度产生变化 ,从而使电流变液体的动态屈服应力、表观粘度和平均法向应力得到大大增强 .其中动态屈服应力与其间隙的 α次方成反比 ,表观粘度与其间隙的平方成反比 ;平均法向应力与其间隙的 5次方成反比 .使电流变液获得比库埃特 ( Couette)流和泊肃叶 ( Poiseuille)流更高的电致屈服应力和平均法向应力 (承压力 )以满足工程实际需要 .更多还原

【Abstract】 Theoretical analysis shows that the dynamic yielding stress, apparent viscosity, and average normal stress of electrorheological suspensions are greatly strengthened with the variation of rheological gap and changes in the electric field strength during the squeezing process under a constant voltage. In this process the dynamic yielding stress varies in inverse proportion to the α th power with the gap size, the apparent viscosity varies in inverse proportion to the square of the gap, and the average normal stress varies in inverse proportion to the 5th order with the gap size. It is shown that the electro yielding stress and the average normal stress of the electrorheological suspension during a squeezing flow reach greater values than are obtainable during the Poiseulle and Couette flows, thus meeting needs in engineering applications.更多还原