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摘要：磁流变液是一种智能材料，主要由磁性颗粒、载液及表面活性剂组成。磁流变液中的悬浮颗粒在磁场的作用下凝结成链状、柱状、团状或其他复杂的网状结构，使磁流变液表现出粘塑性流体状态，撤去磁场后又恢复低粘度的牛顿流体状态，磁流变液这种可逆的转变现象,称为磁流变效应。由于磁流变液的磁流变效应具有可逆性、可控性、快速响应等优点，目前已在航空、汽车、建筑等诸多领域受到广泛关注，被认为是未来最具有前景的智能材料之一。过去的几十年中,人们对于磁流变液性能的研究主要集中在磁流变液的粘度、剪切屈服应力、剪切模量等剪切性能上，对于磁流变液正应力的研究还处于起步阶段,对磁流变液正应力的认识还不够深入。本毕业论文针对磁流变液的正应力测试设计了一套磁流变液正应力测试系统，并用该测试系统进行了相关实验，研究磁场对磁流变液正应力的影响。 20707
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关键词： 磁流变液；正应力；测试系统
The design of the testing system of Magnetorheological fluid normal force and experiment
Abs t rac t: Magnetorheological fluid is a kind of intelligent materials, Mainly cons ist of
magnetic particles，carrier liquid and surfactant. Unde r the act io n o f ma gne t ic fie ld, the
suspended particles in the Magnetorheological fluid condense into chains, columnar, group, or
other complicated reticular struc ture. It makes the Magnetorheological fluid showe vis cop las t ic
fluid state. When the magnetic field is removed and then Magnetorheological fluid restores the
low viscos ity of Newtonian fluid state. The reversible shift phenomenon of Magnetorheological
fluid, is called the magnetorheological effect. Magnetorheological effect of Magnetorheological
fluid has the advantages of reversibility, controllability, rapid response, whic h has been widely
take n at tent ion in many fie lds such as ae rospa ce, automot ive, cons truc t ion and it is considered
to be one of the most promising smart materials in the future. In the past few decades, people in
the study of the performance of magnetorheological fluid mainly concentrated in the viscosity
and shear yield stress of magnetorheological fluid, the shear properties such as shear modulus, the Magnetorheological fluid normal stress research is still in its infancy, the understanding of
Magnetorheological fluid normal stress is not deep enough. In this paper, We have designed a
set of Magnetorheological fluid normal stress test system according to Magnetorheological
fluid normal stress test.And relevant experiments has been carried out to study the effect of
magnetic field to the normal stress of Magnetorheological fluid.
Ke ywo rds : Magnetorheological fluid; Normal stress; The test system 目录
1 绪论 1
1.1 课题的目的和意义 1
1.1 磁流变液概述 .. 1
1.2 磁流变液及其性能的研究 3
2 磁流变液正应力测试装置的设计 9
2.1 设计原理 . 9
2.2 设计结果 .. 10
2.3 工作原理 .. 12
2.4 设计依据 .. 12
2.4.1 励磁线圈及其铁心的设计 . 12
2.4.2 电机及联轴器的选型 15
2.4.3 力传感器的选型 .. 18
2.4.4 上剪切轴盘的设计 . 19
2.4.5 下剪切轴盘的设计 . 20