Analysis on the enhancement mechanism of bidisperse magnetorheological fluid based on the local microstructural models
Analysis on the enhancement mechanism of bidisperse magnetorheological fluid based on the local microstructural models
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基于局部微观结构模型的双分散磁流变液增强机理分析
DOI：
10.1007/s00397-021-01316-x
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发表时间：
2021-11
期刊：
影响因子：
2.3
通讯作者：
Xianghe Peng
中科院分区：
文献类型：
--
作者：
Hongzhi Huang;Haitao Li;Wencai Wang;Xianghe Peng
双分散磁流变液的剪切性能已经通过实验或模拟的方法得到了广泛的研究，但其增强机理的研究还不够充分，有待于进一步的研究。在本文中，我们提出了一种新的方法来分析的机制的基础上的局部微观结构模型。通过相似实验确定了双分散磁流变液中颗粒的典型局部构型，并通过微观结构模拟得到了证实。在此基础上，模拟了剪切过程中局部结构的演化，并提出了相应的抗剪模型。结果表明，小颗粒附着在链的两侧可以增加剪切阻力和剪切变形，并通过分析小颗粒和大颗粒在局部微结构中的相对位置演化确定了其增强机制。研究了粒径比对双分散磁流变液性能的影响。研究发现，磁流变液存在一个最佳粒径比，以获得更好的性能。
The shear properties of bidisperse magnetorheological (MR) fluid have been extensively studied based on the experiment or simulation method, but the research on the enhancement mechanism is still not sufficient and need to be further investigated. In this paper, we proposed a new approach to analyze the mechanism based on the local microstructural models. The typical local configurations of particles in bidisperse MR fluid were determined by means of similarity experiment and confirmed by microstructure simulations. Subsequently, the evolution of local configurations under the shear process was simulated, and the corresponding shear resistance models were proposed. It is found that the configurations with small particles attached on sides of the chain can increase the shear resistance as well as the shear deformation, and the enhancement mechanism is determined based on the analysis of the relative position evolution of small and large particles in the local microstructures. The effect of particle size ratio on the properties of bidisperse MR fluid was also investigated. It is discovered that there is an optimal particle size ratio for MR fluid to achieve better performance.
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