| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Outline of Final Research Achievements |
The torque-transfer devices using magnetorheological fluid are required their miniaturization and higher torque transfer. The purpose of this study is clarification of phenomena such as forming, deforming, and slipping of the clusters by using real-time observation and simultaneous torque measurement and a distinct element method, in order to support the design of enhanced shear stress of the devices.
We designed and assembled a system, in which the two magnetic-pole disks are rotated and vertically applied magnetic field. In the clearance of the poles, magnetic particles form cluster, deformed among them, and slipped on the pole surface. The high-speed microscope observes the particles from the side of the poles, simultaneously, the torque between the poles is also measured. Furthermore, concavo-convexes on the pole surface enhanced maximum torque 2.5 times from the flat surface. This is because the magnetic fields were concentrated at the concaves, which was confirmed by simulation.
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