LESSON 5.3 · 2:07 · CHAPTER 5 · PATTERNS
Integer patterns leak
If every ply closes on a whole number of circuits from the same start, each ply's bands land exactly on the last ply's: the small gaps between band edges stack straight through the wall. A half-band shift per ply staggers them.
Predict · at 0:45 in the video
Two patterns: 37.0 circuits per ply, or 37.5. Which one leaks?
37.0. The gaps line up through the whole wall, a straight channel of resin. Microcracks in that resin, and a drop of water finds its way out.
Further reading
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
About the numbers
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.
Up next · 5.4 · 2:13Pattern number