Do you have any guidance on how to directly specify the 6x6 cross section mass and stiffness matrices that are required to model a wing or wind turbine blade? It does not appear that there is any functionality for this in Abaqus CAE. Are meshed cross sections and .bsp files capable of supporting all off diagonal terms? Is this possible through a user subroutine? Alternatively is this functionality available in other tools such as SIMPAC Wind?