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为深入了解电流变液的粘度和剪切屈服应力等宏观力学性能与其微观结构的关系,对不同高压电场作用下电流变液的成链过程,成链后的流动、屈服状态以及受剪切时链结构的变化进行了微观结构观测。结果表明:改变电场和运动状态等外部条件,电流变液的微观链结构会发生相应变化,从而影响其力学性能;电流变液的链结构主要在极板附近发生屈服和滑移;单链在剪切作用下会形成带状离散结构。
In order to understand the relationship between macro mechanical properties such as viscosity and shear yield stress of ER fluids and their microstructures, the formation process of ER fluids under different high-voltage electric fields, the flow, yield state and shear stress Changes in the chain structure were microscopic observations. The results show that the micro-chain structure of electrorheological fluid will change correspondingly under the external conditions such as electric field and motion, which will affect its mechanical properties. The chain structure of ER fluid mainly yields and glides near the plate. Shear will form a ribbon of discrete structure.