Best way to joint fabricated carbon strut structure.


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Tobias
Tobias
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Hi there,
I am pretty new to working with carbon, but have a good background in other materials.

I am working on designing a strutted framework, fabricated out of 5mm pultruded carbon tube, and I thought it best to seek some advice about how best to make the joints. My plan is to build a jig which holds everything flat, and use a braided sleeve to form a reinforced skin. However since I also plan on painting the structure, I don't necessarily need the braid for aesthetics, however I also don't want 'spider knees' at each join. 

To simplify things, lets assume i am building a small chair, with some structural triangulation, which needs to hold about 10kg ( so in real world terms I guess it has to be over-engineered to not fail under 50kg, or something of the kind ).

In my crude drawing I have 3 potential jointing processes, but I wonder if there is another I have not considered, or if I would be better off making a mould and a core, and using a cast component joined by tubes, rather than attempting to join struts together. 

Thanks,
T
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Shaneer22
Shaneer22
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When bonding any metal I still use the wet sanding technique using 240 wet and dry sometimes 120 and sand metal with epoxy prior to bonding it really etches into the metal surface,belt and braces on my part.
GO

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