The second matrix displayed for the Stiffness Formulation for Strain Equivalence shows the Anisotropic Elasticity Tensor (GPa) in PMA Coordinates. In particular, the difference from this tensor can be used to estimate the quality of the Orthotropic Approximation, Transverse Isotropic Approximation, Cubic Approximation (all in PMA coordinates), and Isotropic Approximation shown also in the result file.

The Anisotropic Elasticity Tensor in PMA Coordinates looks similar to the Anisotropic Elasticity Tensor, but it has been transformed to another coordinate system. The off-diagonal coefficients are smaller, so that setting them to zero would lead to smaller errors. For our examples, we obtain: