Good day, I'm trying to model a composite curved specimen on Abaqus, but I have problem in understanding how to define a reference system that represents the orientation of the fibers all along the curvature. As far as I understood, this can not be done in the CAE but only in the text editor, however by reading the manual, I'm not sure on what I should write.

If any of you had any kind of example, alternative and insight on how to do it, I'd appreciate it very much.