#### 5.2.2.1. Reference Coordinates

The reference coordinates, which are needed to evaluate the material stiffness and strains are evaluated depending on the laminate properties or the curvature. If the laminate is non-isotropic, the reference coordinates are parallel to the principal laminate directions, where the first principal laminate stiffness has its maximum. In the case of a quasi-isotropic laminate, the reference coordinates are parallel to the principal curvature directions.

Release 18.2 - © ANSYS, Inc. All rights reserved.