| Abstract | dc.description.abstract | Magneto-active elastomers are smart materials composed of a rubber-like matrix material containing
a distribution of magneto active particles. The large elastic deformations possible in the rubber-like matrix
allow the mechanical properties of magneto-active elastomers to be changed significantly by the application
of external magnetic fields. In this paper, we provide a theoretical basis for the description of the nonlinear
properties of a particular class of these materials, namely transversely isotropic magneto-active elastomers.
The transversely isotropic character of thesematerials is produced by the application of a magnetic field during
the curing process, when the magneto active particles are distributed within the rubber. As a result the particles
are aligned in chains that generated a preferred direction in the material. Available experimental data suggest
that this enhances the stiffness of the material in the presence of an external magnetic field by comparison with
the situation inwhich no external field is applied during curing, which leads to an essentially random (isotropic)
distribution of particles. Herein, we develop a general form of the constitutive law for such magnetoelastic
solids. This is then used in the solution of two simple problems involving homogeneous deformations, namely
simple shear of a slab and simple tension of a cylinder. Using these results and the experimental available data
we develop a prototype constitutive equation, which is used in order to solve two boundary-value problems
involving non-homogeneous deformations—the extension and inflation of a circular cylindrical tube and the
extension and torsion of a solid circular cylinder. | en_US |
