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Synthesis and Optimization of Magneto-Rheological Fluid for Dampers of Suspension System

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Document pages: 14 pages

Abstract: The fluids which change their properties in presence of an electric or magnetic field are known as smart fluids. These fluids are consists of micro sized metal particles of iron, cobalt, nickel etc. suspended in an inert carrier fluid. The additives are used in these fluids to avoid the sedimentation of particles suspended in fluids. The presented work is focused on synthesis of MR fluid using Carrier Fluids viz. low viscosity Paraffin oil, Silicon Oil (OKS 1050) and Synthetic oil (OKS 352), Additives viz. Aerosil 200 (fumed silica), AP3 Greece and Carbonyl Iron Powder with particle size 3 µm and 5 µm. Two factor three level (32) Central composite response method using Design-Expert® 10.0.4 version has been applied to optimize the percentage of various contents of MR fluid to achieve the fluid with lowest sedimentation rate. The characterization of synthesized samples (MR1 to MR10) is carried out and compared their properties with the typical properties of MR fluid. An analytical approach (Carlson) is used to determine the yield stress of MR fluid and also it is determined using experimentally obtained values of magnetic flux density (B) of MR fluid. The fluids are developed for dampers used in automobile suspension system. The properties of all the synthesized samples are comparable with typical properties of MR fluid and few of the samples have shown the excellent stability with respect to time.

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