Y. Mao, M. Warner, E. M. Terentjev, R. C. Ball
Cavendish Laboratory, Madingley Road,
Cambridge, CB3 OHE, UK.
We present a model calculation of the elasticity of a nematic elastomer of finite-lengthed network strands under affine deformation. The result is derived in its full tensorial structure, and its predictions are examined. In particular, we look at the non-Gaussian corrections to the effects of soft elasticity and elastic anisotropy. We find that the soft modes can at most be hardened at when compared to the conventional rubber elastic energy, where N is the number of monomer units along a typical strand. The elastic moduli for extensions parallel and perpendicular to the nematic director are found to differ at .