Carbon fibre layup technique advice?

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oceanfire
oceanfire
WA
718 posts
WA, 718 posts
22 Oct 2014 6:44am
G'day all

Can anyone point me to a good source/s of information on how to layup carbon fibre?

I'm looking for techniques on how to achieve varying amounts of stiffness/flexibility in a single part.

Anything from the basics to more advanced techniques would be appreciated.

Just looking to short cut the googling process, hoping some of you know good sources of info.

Cheers!
Mark _australia
Mark _australia
WA
23695 posts
WA, 23695 posts
22 Oct 2014 8:34am
That's going to be hard with different laminate thickness
What are you trying to make?
oceanfire
oceanfire
WA
718 posts
WA, 718 posts
22 Oct 2014 9:54am
I can't divulge the concept here unfortunately, I'm doing a bit of prototyping.

It's fairly simple but a little complex at the same time.

What I'm trying to do is produce a part that is rigid on one end, which can be tapped and bolted, and then transitions over a certain distance to a flat flexible section.

Edit:
It's the flexibility of the component that I'm most interested in finding info for; how to lay up the carbon fibre sheets to acheive the flexibility I'm after.
sausage
sausage
QLD
4874 posts
QLD, 4874 posts
22 Oct 2014 12:47pm
oceanfire said..

What I'm trying to do is produce a part that is rigid on one end, which can be tapped and bolted, and then transitions over a certain distance to a flat flexible section.



It's called a carbon fin I think
oceanfire
oceanfire
WA
718 posts
WA, 718 posts
22 Oct 2014 11:14am
Haha, nah, but the techniques for that may help a bit.
Thanks for the tip.
Loftywinds
Loftywinds
QLD
2060 posts
QLD, 2060 posts
22 Oct 2014 4:22pm
Carbon in Kite surfing = Foils
decrepit
decrepit
WA
12885 posts
WA, 12885 posts
22 Oct 2014 6:55pm
you can achieve a lot by weave direction, 45deg is least stiff.
Thickness of course is the major factor, you can vary that with core material.
keef
keef
NSW
2016 posts
NSW, 2016 posts
23 Oct 2014 12:55pm
the best thing to do is talk to a technician at a fiber glass supply, I would imagine you will need to use a glass /Kevlar composite for it to be flexible and as decrepit mentioned some sort of core material
keef
keef
NSW
2016 posts
NSW, 2016 posts
23 Oct 2014 6:49pm
oceanfire said..
I can't divulge the concept here unfortunately, I'm doing a bit of prototyping.

It's fairly simple but a little complex at the same time.

What I'm trying to do is produce a part that is rigid on one end, which can be tapped and bolted, and then transitions over a certain distance to a flat flexible section.

Edit:
It's the flexibility of the component that I'm most interested in finding info for; how to lay up the carbon fibre sheets to acheive the flexibility I'm after.


this is like a 20 questions thread, it depends on how much flex you want , if you want flex you mite need to look at a different fiber as well as different weaves ,
you can combined different E/S glass satin weave to combine strength with flexability as well as a tough abrasive strength,
http://thayercraft.com/aero.htm
you can use unidirectional carbon longitudinal and then 45deg where you want the flex
where you have the thick base that can be drilled and tapped it would have to be a solid composite after that you could use a core to save on extra weight and expensive carbon , I most cases where you want the flexibility you will need to use a vacuum to suck any traped air and compress the fibers in what ever your making
you also mite want to look at different resins , the chart below will give you an idea on what different fibers are doing
www.christinedemerchant.com/carbon-kevlar-glass-comparison.html
oceanfire
oceanfire
WA
718 posts
WA, 718 posts
23 Oct 2014 10:46pm
keef said...
this is like a 20 questions thread...


Sorry to be secretive, I was just trying not to ask for specific advice, as I know without full info it'd be hard to offer any specific advice.
I was just looking for some good sources of info I could learn from, to achieve the properties I'm after in my component.

Thanks for the advice and links, I appreciate it.
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