Dear all.
I am programming a curved Timoshenko beam using NURBS interpolation. However, I can't find out how to numerically integrate the stiffness matrix.
For example: if an element is a B-spline curve composed of four cubic Bezier pieces, how can I perform numerical integration using gauss numerical integration.
I guess I can integrate one Bezier piece. However, I think it is not that simple if a finite element is composed of several Bezier pieces. can anyone help me? Thank you in advance.