There should not be a problem winding the carbon fiber around the bend. I have seen people winding fibers around a 45 degree elbow for pipe fitting with diameter ranging from 2" to 16" diameter and so far there is't any complain of any weak area at the bend.
One point to take note is...
Transparent composites?? Sounds interesting however what i feel is that it is very difficult to make a 100% completely transparent composites.
Let's talk about the reinforcement material first. For this case i don't think you can use continuous fiber. Maybe you can try chopped/cropped fiber or...
PEmrich make a good point on the advatage of using composites material. Bascially it is higher strength and stiffness and lower weight. However the analysis of composite material is very complicated and no two composites material are alike even if they are manufacture from the same process.
As...