The work reports the life-cycle test of flake-shaped particle-based magnetorheological (MR) fluid using the MR brake system and evaluated the performance of brake. The choice of the application is based on the understanding that normal force in this case is zero and the same is not true for other applications. Thus, it will exhibit only shear-induced deformation/degradation of MR fluid properties. The test was performed under a constant magnetic field for 10⁵ cycles at 300 rpm. The MR fluid collected after cyclic operation exhibits no change in surface morphology as well as MR properties. Thus, the torque transmission even after this cycle remains the same. This is not the same when commercially available spherical particle-based MR fluid is used. There is a decrement in the torque transmission of MR brake by ~ 30%. The results are discussed on the basis of MR effect and the change in surface morphology of particles. The results confirm that the use of flake-shaped-based MR fluid gives better performance when used for long-term application.

中文翻译：

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各向异性颗粒基磁流变液在MR制动性能中的生命周期评估

该工作报告了使用MR制动系统对片状颗粒基磁流变（MR）流体进行的生命周期测试，并评估了制动器的性能。应用的选择是基于这样的理解，在这种情况下，法向力为零，而其他应用则不一样。因此，它将仅表现出剪切剪切引起的MR流体特性的变形/降解。该测试在恒定磁场下进行10 ⁵以300 rpm的速度循环。循环操作后收集的MR流体在表面形态和MR特性方面均没有变化。因此，即使在该循环之后，扭矩传递也保持不变。当使用可商购的基于球形颗粒的MR流体时，这是不同的。MR制动器的扭矩传递降低了〜30％。在MR效应和颗粒表面形态变化的基础上讨论了结果。结果证实，当用于长期应用时，使用片状MR流体可提供更好的性能。