Searching for a Stable High‐Performance Magnetorheological Suspension,Advanced Materials

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Searching for a Stable High‐Performance Magnetorheological Suspension
Advanced Materials ( IF 27.4 ) Pub Date : 2018-08-27 , DOI: 10.1002/adma.201704769
Youngwook P. Seo ₁ , Sangsok Han ₁ , Junsok Choi ₁ , Atsushi Takahara ₂ , Hyoung Jin Choi ₃ , Yongsok Seo ₁

Affiliation

Magnetorheological (MR) fluids are a type of smart material with rheological properties that may be controlled through mesostructural transformations. MR fluids form solid‐like fibril structures along the magnetic field direction upon application of a magnetic field due to magnetopolarization of soft‐magnetic particles when suspended in an inert medium. A reverse structural transition occurs upon removal of the applied field. The structural changes are very fast on the order of milliseconds. The rheological properties of MR fluids vary with the application of a magnetic field, resulting in non‐Newtonian viscoplastic flow behaviors. Recent applications have increased the demand for MR materials with better performance and good long‐term stability. A variety of industrial MR materials have been developed and tested in numerous experimental and theoretical studies. Because modeling and analysis are essential to optimize material design, a new macroscale structural model has been developed to distinguish between static yield stress and dynamic yield stress and describe the flow behavior over a wide range of shear rates. Herein, this recent progress in the search for advanced MR fluid materials with good stability is described, along with new approaches to MR flow behavior analysis. Several ways to improve the stability and efficiency of the MR fluids are also summarized.

中文翻译：

寻找稳定的高性能磁流变悬架

磁流变（MR）流体是一种具有流变特性的智能材料，可以通过介观结构转换对其进行控制。MR流体在悬浮于惰性介质中时，由于软磁性粒子的磁极化作用，在施加磁场时会沿磁场方向形成固体状的原纤维结构。在去除所施加的场时发生反向的结构转变。结构变化非常快，大约为毫秒。MR流体的流变特性会随磁场的施加而变化，从而导致非牛顿粘塑性流动行为。最近的应用增加了对具有更好的性能和良好的长期稳定性的MR材料的需求。已经开发了多种工业MR材料，并在大量的实验和理论研究中对其进行了测试。由于建模和分析对于优化材料设计是必不可少的，因此已经开发了一种新的宏观结构模型，以区分静态屈服应力和动态屈服应力，并描述各种剪切速率下的流动行为。在此，描述了在寻找具有良好稳定性的高级MR流体材料方面的最新进展，以及用于MR流动行为分析的新方法。还总结了几种提高MR流体的稳定性和效率的方法。已经开发出一种新的宏观结构模型，以区分静态屈服应力和动态屈服应力，并描述在大范围的剪切速率下的流动行为。在此，描述了在寻找具有良好稳定性的高级MR流体材料方面的最新进展，以及用于MR流动行为分析的新方法。还总结了几种提高MR流体的稳定性和效率的方法。已经开发出一种新的宏观结构模型，以区分静态屈服应力和动态屈服应力，并描述在大范围的剪切速率下的流动行为。在此，描述了在寻找具有良好稳定性的高级MR流体材料方面的最新进展，以及用于MR流动行为分析的新方法。还总结了几种提高MR流体的稳定性和效率的方法。

更新日期：2018-08-27

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