Dear Terence,
Yes, I suppose you can say that.
However, please bear in the mind that the existing blade model in FAST effectively assumes an isotropic material. For composite blades with anisotripic material, FAST will miss a lot of terms. See the following forum topic for more information: Coupled blade modes in FAST.
The new finite-element blade model that we are developing (mentioned briefly in the post above) is capable of modeling highly flexible composite blades, including:
*Full geometric nonlinearity
*Bending, torsion, shear, & extensional DOFs
*Anisotropic material couplings
*Sectional offsets
*Initially curved/swept blades
Best regards,