Wishing to obtain information on the title subject joining tubular members. As I am designing a semi scale model of a microlight aircraft with partly open airframe structure, similar to a warren girder framework using approx. 10mm tube. I am seeking information on load bearing joining material for carbon tubes. The information I have obtained recently is from a U.S.A. Patent by Kryzysztof Kotlinski for F1 Car Frames and Aerospace frames. The binding material used is described as anisotropical binding wire. Is  anyone familiar or used such a method.

From the description it sounds like the use of single tows wrapped around the joint for reinforcing purposes.  The technique for that would be the same as wrapping any tape around a joint.

That method is one of several to join tubes. methods include inserts/ferrules either in composites or aluminium, wrapping with tape, using interference fit tubes and bonded at the overlap are just the obvious ones that come to mind.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant