Some element types accept anisotropic elastic material properties, which are usually input in the form of a matrix. (These properties are different from anisotropic plasticity, which requires different stress-strain curves in different directions.) Among the element types that allow elastic anisotropy are PLANE222, PLANE223 (the 2D coupled-field solids), SOLID225, SOLID226, and SOLID227 (the 3D coupled-field solids).

The procedure to specify anisotropic elastic material properties resembles that for nonlinear properties. You first activate a data table using the TB command (with Lab = ANEL) and then define the terms of the elastic coefficient matrix using the TBDATA command. Be sure to verify your input with the TBLIST command.

For a more information, see Anisotropic Elasticity in the Material Reference.