期刊
SMART MATERIALS AND STRUCTURES
卷 23, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/23/2/027001
关键词
magnetorheological fluid (MRF); rheological property; plate-like iron particles; bidisperse MRF; MR damper; particles sedimentation
资金
- National Research Foundation of Korea (NRF)
- Korean government (MEST) [2010-0015090]
- National Research Foundation of Korea [2010-0015090] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study presents a new kind of low sedimentation magnetorheological fluid (MRF). Its salient properties are evaluated using a small-sized damper. The proposed MRF is characterized to investigate the effect of plate-like iron particles on rheological properties such as yield stress and flow behavior. Plate-like micron size iron particles play an important role in improving stability against rapid sedimentation as well as in enhancing the value of the yield stress. This study also considers a bidisperse MRF because this can produce a higher yield stress compared with a monodisperse suspension. Since the field-dependent yield stress is the key factor in mechanical applications, the physical properties of the MRF proposed in this work are evaluated and applied to the design of a small-sized damper which can be used for vibration control in washing machines. In order to verify the smaller effect on the damping force due to the particle sedimentation, the field-dependent damping forces are measured under two different operating conditions; one is just after filling the MRF and another after operating for 48 h. The proposed MRF is shown to be very effective in reducing adverse effects due to particle sedimentation.
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