A random field formulation of Hooke's law in all elasticity classes
  For each of the $8$ isotropy classes of elastic materials, we consider a homogeneous random field taking values in the fixed point set $\mathsf{V}$ of the corresponding class, that is isotropic with respect to the natural orthogonal representation of a group lying between the isotropy group of the class and its normaliser. We find the general form of the correlation tensors of orders $1$ and $2$ of such a field, and the field's spectral expansion. 
Anatoliy Malyarenko and Martin Ostoja-Starzewski
math-ph math.MP math.PR