Compressive and tensile stresses of magnetorheological fluids in squeeze mode

Abstract

Magnetorheological (MR) fluid exhibits a perceptible change of rheological properties in reaction to external magnetic field. The MR fluids are currently enjoying renewed interest within the technical community in terms of the fundamental and applied research. MR fluids behaviour in squeeze mode is one of the areas that remain unknown as compared to valve and shear modes. Therefore, this paper presents stress-strain relationships of MR fluids under compression and tension tests. The results demonstrated that MR fluid corresponded to the changes in compressive and tensile stresses due to the changes in magnetic field strength. The compressive stresses were found to be much higher than the tensile stresses for the same experimental parameters. The behaviour of the MR fluids were dependent on the types of the carrier fluid and magnetic field strength. Furthermore, combinations of the stress-strain curves under quasi-static compression and tension modes were matched with the curves under dynamic loading.