Influence of mixed particle sizes on shear yield stress of magnetorheological fluid Einfluss von gemischten Partikelgrößen auf die Scherfließspannung einer magnetorheologischen Flüssigkeit

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialwissenschaft und Werkstofftechnik Pub Date : 2024-10-22 DOI:10.1002/mawe.202400093

X. H. Liu, W. T. Zhou, P. P. Yan, Z. M. Fu, Y. Wu, X. Y. He, F. Li

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Abstract

This study investigated the effect of magnetic particle size and volume fraction on the shear yield stress and dynamic viscosity of magnetorheological fluids. Magnetorheological fluids with varying volume fractions of micro- and nanoscale magnetic particles were prepared. A plate-on-plate shear test bench was constructed to evaluate the fluids under a constant shear rate, with the applied current ranging from 0 A to 1.2 A. Results indicated that the shear yield stress initially increased and then decreased as the volume fraction of magnetic nanoparticles increased, reaching a maximum of 47 kPa at a volume fraction of 7 %. However, the excessive addition of magnetic particles or large-diameter particles led to settling and reduced stability of the fluids. The findings suggest that optimizing the size and volume fraction of magnetic particles is crucial for maximizing the shear yield stress of magnetorheological fluids.

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混合颗粒尺寸对磁流变液剪切屈服应力的影响混合颗粒尺寸对磁流变液剪切屈服应力的影响

本研究探讨了磁性颗粒尺寸和体积分数对磁流变液剪切屈服应力和动态粘度的影响。研究人员制备了具有不同体积分数的微米级和纳米级磁性颗粒的磁流变液。构建了一个板对板剪切试验台，以评估恒定剪切速率下的流体，施加的电流从 0 A 到 1.2 A 不等。结果表明，随着磁性纳米粒子体积分数的增加，剪切屈服应力先是增大，然后减小，在体积分数为 7% 时达到最大值 47 kPa。然而，过量添加磁性颗粒或大直径颗粒会导致沉降，降低流体的稳定性。研究结果表明，优化磁性颗粒的大小和体积分数对于最大限度地提高磁流变流体的剪切屈服应力至关重要。

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来源期刊

Materialwissenschaft und Werkstofftechnik 工程技术-材料科学：综合

CiteScore

2.10

自引率

9.10%

发文量

154

审稿时长

4-8 weeks

期刊介绍： Materialwissenschaft und Werkstofftechnik provides fundamental and practical information for those concerned with materials development, manufacture, and testing. Both technical and economic aspects are taken into consideration in order to facilitate choice of the material that best suits the purpose at hand. Review articles summarize new developments and offer fresh insight into the various aspects of the discipline. Recent results regarding material selection, use and testing are described in original articles, which also deal with failure treatment and investigation. Abstracts of new publications from other journals as well as lectures presented at meetings and reports about forthcoming events round off the journal.