Dear Bowen,
I’m not familiar with your reference or equations, and I’m not sure I understand your question. The NREL 5-MW baseline blade does not have composite material coupling like bend-twist coupling. So, if you want that, you’ll need to modify the blade design anyway.
But if this is useful to you, the composite layup of the NREL 5-MW baseline blade has been reversed engineered by Brian Resor of Sandia National Laboratory, as discussed in the following forum topic: Structural design of the wind turbine blade - #18 by Zhikang.Deng.
Best regards,