OOF2: The Manual
Name
CubicRank4Tensor — Representations of a cubic 4th rank tensor.
Subclasses
Subclasses are listed as they appear in the GUI and (in parentheses) as they appear in scripts.

Cij (
CubicRank4TensorCij
)  Explicit representation in terms of tensor components. 
Lame (
CubicRank4TensorLame
)  Cubic rank 4 tensor in terms of Lame coefficients. 
E and nu (
CubicRank4TensorEnu
)  Cubic rank 4 tensor in terms of Young's modulus and Poisson ratio. 
Bulk and Shear (
CubicRank4TensorBulkShear
)  Cubic rank 4 tensor in terms of bulk and shear moduli.
Description
The CubicRank4Tensor
represents rank 4
tensor properties with cubic rotational symmetry, such as
cubic elasticity. The cubic rank 4 tensor has three
independent components, as shown in Figure 6.55. Because the elasticity
literature uses many different representations of these two
components, OOF2 allows you to enter the tensor in a variety of
formats.
Note  

The word “rank” has different meanings in different fields. Here it means the number of indices on a tensor. is a rank 4 tensor. 