Where to put the eye
The fibre leaves the eye in a straight line tangent to its path on the mandrel, so the eye must sit on that tangent line. How far along it (the free fibre length) is a trade: too long and the band wanders, too short and the eye clashes. At low angles the tangent hugs the surface, so a fixed free length leaves almost no clearance; machines ride the eye on a clearance envelope instead.
Predict · at 0:39 in the video
At very low winding angles, is a fixed free fibre length too long, or too short?
Too short. At a low angle, the tangent runs almost along the surface. On a 100 millimetre radius, with 100 millimetres of free fibre at 10 degrees, the eye is only 1.5 millimetres off the surface.
This course is our own. These books go deeper.
- Composite Filament Winding, S. T. Peters (ed.), ASM International, 2011
- Filament Winding: a Unified Approach, S. Koussios, Delft University Press, 2004
Simulations in this lesson are our own. Where a number rests on an assumption, the video marks it with an asterisk and says where it comes from.
