International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 04 | Apr 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 2517 Development and Testing of MR fluid using Soybean oil as a carrier oil Shashikant K Nimbalkar 1 , Mahammadrafeeq Manvi 2 , Basavaroodh Badiger 3 , Shashir Kenganal 4 , Sarfarazali Khazi 5 , Sachin Pandey 6 123456 Assistant Professor, Dept. of Mechanical Engineering, SECAB.I.E.T. Vijaypur, Karnataka, India. ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - Magneto Rheological is a branch of rheology that deals with the flow and deformation of the materials under an applied magnetic field. These types of materials change their rheological properties under the application of magnetic field applied and turn from liquid to solid in just few seconds. The main aim of this project was to prepare a low cost (economical) MR fluid by using soybean oil. According to experimental result, the prepared MR fluid shows good efficiency in presence of external magnetic field. The MR fluid is tested in parallel plate rheometer, which shows that the shear stress and shear rate property of the prepared fluid varies between 0-2A. After this range, fluid shows the properties same as the 2A. Hence, the soybean oil can be used as carrier oil for the preparation of the MR fluid. Key Words: Magneto Rheological, low cost MR fluid, rheometer, soybean oil, shear stress and shear rate. 1.INTRODUCTION Rheology is branch of science that deals with the study of deformation and flow of matter such as magneto rheological fluids, blood, paint etc. under the impact of a stress. Magneto Rheological is a branch of rheology that deals with the flow and deformation of the materials under an applied magnetic field. These types of materials change their rheological properties under the application of magnetic field applied and turn from liquid to solid in just few seconds. 1.1 WHAT IS MR FLUID? The discovery of Magneto Rheological (MR) fluid is attributed to Jacob Rabinow in 1940’s. Magneto rheological fluids are a class of smart material which can be simply referred as a controllable fluid. Nowadays they are stable and have many influencing property such as high yield stress and low viscosity. Because of this magneto rheological fluids are recently used in vehicle suspension system. Magneto rheological fluids are mixture of micron sized iron particles (ferromagnetic particle) and grease in appropriate carrier oil. MR fluids respond to a change in rheological properties on the application of external magnetic field. 1.2 PROPERTIES OF MR FLUID The typical properties of magneto rheological fluids are as shown in Table -1. Table -1: Properties of magneto rheological fluids Property Range Density 3 - 4.5gm/cm3 Initial viscosity 0.2 – 1.0 (Pa.s) at 240C Magnetic field strength 160 – 240 (KA/m) Maximum yield stress 50 – 100 (KPa) Reaction Time 10 – 20 millisecond (ms) Stability Good Working temperature -50oC – 1500C Supply voltage and current 12V and 0.1 – 2A 2. LITERATURE SURVEY Vaibhav R. et.al., observed the experimental results of “PREPARATION AND TESTING OF MAGNETO RHEOLOGICAL FLUID” that shows the good efficiency of prepared MR fluid in presence of external magnetic field. The MR fluid is tested on guassmeter which shows the result as magnetic field is applied to MR fluid; it changes the physical state that is liquid state to semi-solid state. Guassmeter shows reading of magnetic field intensity by varying the current. Graph1 shows that as current increases then magnetic field intensity of MR fluid also increases. For our application we have used MR fluid in magneto rheological damper which shows better damping performance under the influence of external magnetic field. Graph 2 shows that as the current increases gradually to electrical winding of MR damper then displacement goes on decreasing so that we get sufficient damping. Zhou Feng, et,al., analyzes the “STUDY OF SEDIMENTATION STABILITY OF MAGNETORHEOLOGICAL FLUID” where the main force of the magnetic particles under zero-field intensity, studies main factors of settlement of MRF, such as the size of magnetic particles, the difference of density between magnetic particles and carrier fluid, the viscosity of the carrier fluid, etc. Currently, there are some measures to improve the sedimentation stability of MRF at home and abroad. Here are several measures: adding appropriate additives and surfactant, adding magnetic particles coated withorganic polymer, improving the preparation process and parameters, adding composite magnetic particles, pulling in some nanomaterials, adding some oxidant etc.