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Best way to joint fabricated carbon strut structure.
Best way to joint fabricated carbon strut structure.
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Best way to joint fabricated carbon strut structure.
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Tobias
Tobias
posted 12 Years Ago
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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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Carbon
joint
pultruded tube
strut
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Best way to joint fabricated carbon strut structure.
Tobias
-
12 Years Ago
The strongest of the 3 is the tube joiner in aluminium. Such inserts are commonly used to join...
Warren (Staff)
-
12 Years Ago
Hi Warren, So if you were to build such a structure, you would work with alloy inserts and a braided...
Tobias
-
12 Years Ago
They should be bonded in using a structural adhesive like our Normal 0...
Warren (Staff)
-
12 Years Ago
It would appear that the ET515 has no structural value at all, as it seems to neither bond to...
Tobias
-
12 Years Ago
Hello Tobias I have used the above adhesive on the top fairing mount on my classic racing...
carbonfibreworks
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12 Years Ago
Hmm, this was a 20mm carbon tube, and the join was to a strut coming in below, by means of an...
Tobias
-
12 Years Ago
I will post an image of the part on Friday. Regards Chris carbonfibreworks.co.uk
carbonfibreworks
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12 Years Ago
When bonding any metal I still use the wet sanding technique using 240 wet and dry sometimes 120 and...
Shaneer22
-
12 Years Ago
how big is the gap?? I have used ET515 personally for bonding inserts and its been a good bond. You...
Warren (Staff)
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12 Years Ago
As above, I've used that to bond halves of wings together and not had a failure yet
ajb100
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12 Years Ago
I generally consider an adhesive to be something which adheres with a chemical bond, in this kind of...
Tobias
-
12 Years Ago
If you are adhereing it to smooth (albeit degreased) aluminium then I would have expected the...
Warren (Staff)
-
12 Years Ago
For future reference, I've just had confirmation from customer service at Permabond that the correct...
Tobias
-
11 Years Ago
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