Experimental study of magnetoelastics

The effect of magnetic particles concentration and of a uniform magnetic field on elastic properties and dissipation of mechanical energy of new magnetocontrolled materials (magnetoelastics) was studied. Experimental results for Young's modulus E and shear modulus N are presented. It is revealed that increases of concentration of magnetic particles and magnetic field value give increase of an area of the loops under loading and unloading of magnetoelastics. Experiment for research of magnetoelastic properties by a method of twisting pendulum is advanced. Dependences of decrement of attenuation and the magnetoelastic twisting oscillation period on value of a magnetic field and concentration of magnetic particles are obtained. (C) 2005 Elsevier B.V. All rights reserved.