A Random Field Formulation of Hooke's Law in All Elasticity Classes
For each of the 8 symmetry classes of elastic materials, we consider a homogeneous random field taking values in the fixed point set V$\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.