Applicability of Porous Metals in Magneto-rheological Fluid Damping Applications

Project: Research

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This proposal addresses two major drawbacks in the design of the magneto-rheological (MR) fluid dampers, namely the stringent dynamic seal requirement and the excessive volume of MR fluid used. It is thus proposed to use the porous metal bearing concept, in which the fluid lubricant is contained by capillary action in the MR applications, such that the expensive seal is no longer required. This project is aimed at validation of the proposed idea and effects of parameters such as porosity, pore size, flow and magnetic permeability of the porous metal will also be studied experimentally. For effective implementation, one has to ensure the effective transport of the MR fluid (as a two-phase suspension) inside the porous material. A theoretical modelling for the flow of two-phase suspensions through porous media with capillary effect considered will also be carried out. This idea can simplify the design of current MR fluid damper by relaxing the requirement for seals and precision mechanical tolerances.


Project number9041159
Grant typeGRF
Effective start/end date1/01/0723/09/09