group_materi_elasti_transverse_isotropy index dir_0 dir_1 dir_2 $C_{aaaa}$ $C_{bbbb}$
$C_{aabb}$ $C_{abab}$ $C_{bcbc}$

Specifies the unique direction (dir_0 dir_1 dir_2) and the elastic moduli in the transverse isotropic model. The index specifies the element_group, see element_group.