fedoo.constitutivelaw.ElasticAnisotropic.local2global_H

ElasticAnisotropic.local2global_H(H)

Rotate stiffness matrix from local material frame to global frame.

Uses simcoon.Rotation to build the 6x6 Voigt stress rotation matrix QS from the local frame, then computes H_global = QS @ H @ QS^T.