Study on wall-slip effect of magnetorheological fluid and its influencing factors
| Autor: | Lin Honglei, Rongyu Wu, Hui Huang, Shumei Chen, Tang Hongjian, Jinan Zheng, Yunshan Fu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
010304 chemical physics Solid particle Mechanical Engineering 02 engineering and technology Slip (materials science) 021001 nanoscience & nanotechnology 01 natural sciences Wall slip 0103 physical sciences Magnetorheological fluid General Materials Science Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of Intelligent Material Systems and Structures. 33:352-364 |
| ISSN: | 1530-8138 1045-389X |
| Popis: | The wall-slip effect is observed in areas with magnetorheological fluids (MRFs). A slip layer is formed, which reduces the friction between the solid particles and working surface that causes relative movement of the particles. This leads to errors in the measurement of rheological parameters and an inaccurate braking torque model. Thus, here, a rheometer with a sandpaper on the rotor is used to change the working surface roughness to analyze the wall-slip effect of the MRFs. Based on the experimental results, the influence patterns of wall-slip effect on fluid viscosity and yield stress are obtained. Furthermore, a MRF model is established that considers wall-slip effect, which is different from the conventional models. The model is employed to establish a magnetorheological (MR) braking torque model. To verify the braking torque model, a prototype was manufactured, and its mechanical properties were tested. When compared with a smooth rotor, the braking torque of MR brakes with rectangular grooves is increased. This confirms the existence of the wall-slip effect and shows that the wall-slip effect of MRF can be effectively suppressed by incorporating grooves on the rotor surface. |
| Databáze: | OpenAIRE |
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