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Fibre based composites are strictly transversely isothropic. For structural static analysis the must have parameter is Young modulus for 0° (E1) and 90° (E2). For wooven fabrics boths are the same, not for UDs...there is the E2 cca 10-15x lower than E1. Remember, the E is largely different for dry fibres and cured laminate.
The FEM model has to be strictly the same like a real sample, the plies schedule, fibers direction, thickness etc. I´d recommend the fem model build like a shell.
The best is validate the FEM model with reality, measure the displacement and stresses on real condicions and fit it on FEM model.
Good luck, FEM on complex composites structures is the big chalange...