Variable torque transfer characteristics of a new magnetorheological fluid

J. Narayanadas; K. Ravichandran; John Reji

doi:10.1117/12.514861

14 October 2003 Variable torque transfer characteristics of a new magnetorheological fluid

J. Narayanadas, K. Ravichandran, John Reji

Proceedings Volume 5062, Smart Materials, Structures, and Systems; (2003) https://doi.org/10.1117/12.514861
Event: Smart Materials, Structures, and Systems, 2002, Bangalore, India

Abstract

Smart fluids such as magnetorheological and electrorheological fluids which respond to magnetic and electric stimuli have been known for the last few years. The present paper reports development of a new magnetorheological fluid based on an agro seed oil. Carrier fluid based surfactant has been used to stabilize magnetic particles in the fluid. The fluids initial viscosity is around 300 CPs and when a magnetic field of approximately 0.7 tesla is applied, the viscosity rises to 1.3 x 10⁷ CPs. A variable torque transfer hydraulic coupling device has been developed using this new magnetorheological fluid. The torque transferred can be controlled as a function of the applied magnetic field around the fluid. The paper discusses the general fluid formulation, the influence of magnetic field on the viscosity of the fluid, the relationship between shear stress and applied magnetic field, torque transfer and applied magnetic field, torque transfer and initial viscosity of the fluid etc. Photographs showing experimental set up for the viscosity measurements, and hydraulic coupling device developed are included.

Citation Download Citation

J. Narayanadas, K. Ravichandran, and John Reji "Variable torque transfer characteristics of a new magnetorheological fluid", Proc. SPIE 5062, Smart Materials, Structures, and Systems, (14 October 2003); https://doi.org/10.1117/12.514861

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