Abstract
In the present study various magneto-rheological elastomers, which are mixtures with ferromagnetic particles and silicone gel, are introduced in order to develop a new type of magnetic viscoelastic material. Such materials, in view of industrial application, require substantial change of mechanical properties to create a large deformation due to magnetic traction force when even a moderate strength of magnetic field is imposed. In this study, in particular tensile tests for various magneto-rheological elastomers were performed and reported under uniform steady magnetic field. In order to clarify the rheological parameter, the elastic moduli of the elastomers are obtained under tensile strain deformation. As results of the experiment, it was found that at the presence of the applied magnetic field, the elastic moduli of the magneto-rheological elastomers increase and are largely dependent upon magnetic property and size of the magnetic particle to be dispersed, and also upon materials of the dispersant, the silicone gel. The most appropriate combination of those, within the materials used in the present investigation, is discussed in view of gaining large magnetic traction force, which effectively gives large material deformation under applied field.
