I'm modeling a laminated composite surface in Nastran. In order to model the laminate, I need to define a 2D Orthotropic material (i.e. a fiber/matrix composite). Nastran's asking for E1, E2, G12, G1Z, G2Z, and nu12 (Poisson's). In all the calculations I'd done for fiber/matrix composites in the past, I've only needed E1, E2, G12, and nu12. For long, continuous aligned fiber composites, should I leave G1Z and G2Z as 0?
Thanks in advance! Dave