|01-20-2014, 05:48 AM||#1|
Join Date: Dec 2012
Location: USA, AL
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Carbon strength under pressure. How much carbon?
Im looking to make á few intake manifolds for cars. Lets say I have a wax mold, I will coat this mold in cf and when complete melt out the wax.
For the runners I intend to use woven tubes, I will slide them over the wax mold cinch them and epoxy them.
For the plenum I intend to use carbon fiber fabric.
When complete I will bond in annodized aluminum or plastic mounts for the throttle body and the injectors.
For my application I will have constant pressure of say 15 psi and a peak pressure of never more than 25psi.
What density carbon fiber should I use for both the runners and plenum and with how many layers on each? What if i was to go for 40 psi max pressure?
this is what my manifold looks like:
thanks in advance!
|01-20-2014, 01:20 PM||#2|
1)-You'll need to consider waste gate failures and boost spike conditions.
2)-You'll need to research component attachments and hardware.
3)- You'll need to explore clamshell or piece work assembly or perhaps pre-preg one piece and autoclave.
4)-You may have to consider building or re-engineering how each runner attaches to the plenum chamber while keeping things true and square for no leaks.
5)-Don't forget that the larger flat planes will need structure to avoid ballooning under boost.
Then again, since the M50 manifolds are a carbon plastic that tends to crack.....you could simply wrap them with CF wetted with resin and vacuum bag and post cure to re-enforce and already developed part. But that is if weight isn't a big concern.
Seeking Exellence !
Last edited by Worldwealth; 03-03-2014 at 10:28 AM.
|02-24-2014, 02:36 PM||#3|
Join Date: Feb 2014
Thanked 1 Time in 1 Post
This is something I've been thinking about as well recently and think I have come up with a reasonable (pretty basic) way to solve it- or at least get a first basic layup using FEA and CLT.
Can you upload a few more pictures please with as many dimensions as you can add in MS paint and I'll knock up a CAD & FEA model. Some "square on" orthographic photos would really help a lot too.
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|carbon, pressure, strength|