Carbon Fiber Race Seat

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Carbon Fiber Race Seat

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wochi	wochi posted 11 Years Ago HOT Topic Details
Group: Forum Members Posts: 31, Visits: 188	Hi all, i´m trying to do a race seat for my car buy i have no idea of how many layers i should apply to make a good compromise between cost/weight/rigidity. I was thinking in carbon/glass/soric/glass/carbon but no idea of how many layers and grams of each one. Anyone can help? Thanks in advance! David
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ChrisR	ChrisR posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 363, Visits: 3K	While I stand by my previous posts, this is in addition... wochi (30/05/2014) If you have an accident and the door breaks you will probably have razor blades in your direction so it´s worse than a seat. But if the point was me beeing aware of the danger, I already was aware of it. So I can´t see the point in keep posting "don´t do it". Yes but imagine that "shattering" while in contact with your body! Personally I would build in a layer of diolin and/or amarid to help keep the laminate in tact in the event of a structural failure, but in the event of a catastrophic crash and seat failure you would likely be in the "doo doo". If I was making a road car seat then I would add at least 1/2in of flexible rubber/foam liner between the seat frame and the occupant to help contain any fragments. If you look at the failure mode/pattern of CF vs CSM, CSM while being weaker and less stiff tends to fuzzy break, the edges while the can be sharp are a little softer, CF on the other hand will shard and literally be sharp enough to shave with as the fibres are a lot stiffer and "pointier" for lack of a better word, anyone who has mishandled the flash edge or broken edge of a CF sheet will agree (this includes me btw as I've been sliced up by this stuff a few times even with builders gloves on). I'd recommend doing a few test coupons for shatter testing first to see the difference by introducing other materials towards the surface, put them in a vice and (with appropriate personal protection) give them a whack with a lump hammer, you'll soon see what everyone is talking about and where the concern comes from.
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wochi	wochi posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 31, Visits: 188	ChrisR (30/05/2014) While I stand by my previous posts, this is in addition... wochi (30/05/2014) If you have an accident and the door breaks you will probably have razor blades in your direction so it´s worse than a seat. But if the point was me beeing aware of the danger, I already was aware of it. So I can´t see the point in keep posting "don´t do it". Yes but imagine that "shattering" while in contact with your body! Personally I would build in a layer of diolin and/or amarid to help keep the laminate in tact in the event of a structural failure, but in the event of a catastrophic crash and seat failure you would likely be in the "doo doo". If I was making a road car seat then I would add at least 1/2in of flexible rubber/foam liner between the seat frame and the occupant to help contain any fragments. If you look at the failure mode/pattern of CF vs CSM, CSM while being weaker and less stiff tends to fuzzy break, the edges while the can be sharp are a little softer, CF on the other hand will shard and literally be sharp enough to shave with as the fibres are a lot stiffer and "pointier" for lack of a better word, anyone who has mishandled the flash edge or broken edge of a CF sheet will agree (this includes me btw as I've been sliced up by this stuff a few times even with builders gloves on). I'd recommend doing a few test coupons for shatter testing first to see the difference by introducing other materials towards the surface, put them in a vice and (with appropriate personal protection) give them a whack with a lump hammer, you'll soon see what everyone is talking about and where the concern comes from. Now we are getting there. Thanks for the post! I won´t ride it over the carbon. It will have sponge and cover. I know how the carbon shatters and I learnt the worst way while trying to take a part of a mold with my hands. Blood everywhere I like the idea of the diolen inside.Its a realtively "cheap" material and can make a god barrier between the carbon layers and the driver. And soric as a core? Is it a good idea? I made a few parts like rear difusers with it and it seems very stiff even with flat parts. And when it breaks its very even, no razor blades like in carbon only Like this one In the bolting areas a couple of aditional layers of kevlar would do the trick maybe? So beginning in driver side Diolen-Glass-Soric-glass-Carbon maybe?
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Carbon Fiber Race Seat

wochi - 11 Years Ago

I generally encourage the creative process...except when your safety might be in jeopardy. Think...

BlackNDecker - 11 Years Ago

I can´t see why. I see many people using Ebay seats that everytime you seat it seems that is cracks...

wochi - 11 Years Ago

[quote][b]wochi (30/05/2014)[/b][hr]I can´t see why. I see many people using Ebay seats that...

BlackNDecker - 11 Years Ago

Because without crash testing, you don't know if you've got something something decent. A lot of...

Hanaldo - 11 Years Ago

http://www.youtube.com/watch?v=aF3ll_h9EAw The video shows infusion of a seat, and what material...

brainfart - 11 Years Ago

For safety critical componants generally if you cant have it tested or lack the facilities/know how...

Warren (Staff) - 11 Years Ago

I can´t see why all this trouble with the seat. I´m aware that is a safety part but a door, an...

wochi - 11 Years Ago

Yes but a bonnet or door isn't going to be the difference between you walking away from an accident...

Hanaldo - 11 Years Ago

If you have an accident and the door breaks you will probably have razor blades in your direction so...

wochi - 11 Years Ago

There is a good example of a carbon seat in "Composite Materials Fabrication Handbook #2" by John...

ChrisR - 11 Years Ago

I have that book. And it´s a good starter but the seat is very small so I´m affraid that the layup...

wochi - 11 Years Ago

I think you are underestimating the strength and stiffness you can get from CF, the layup suggested...

ChrisR - 11 Years Ago

[quote][b]ChrisR (30/05/2014)[/b][hr]I think you are underestimating the strength and stiffness you...

wochi - 11 Years Ago

While I stand by my previous posts, this is in addition... [quote][b]wochi (30/05/2014)[/b][hr]If...

ChrisR - 11 Years Ago

[quote][b]ChrisR (30/05/2014)[/b][hr]While I stand by my previous posts, this is in addition......

wochi - 11 Years Ago

As far as I read above they are not commanding you not to do it, it's more like it's kind of a risky...

matthieutje65 - 11 Years Ago

How are you going to incorporate bracket holes for mounting? You won't be able to drill directly...

BlackNDecker - 11 Years Ago

you can insert some metal plates between the layers when infusin and then drill

wochi - 11 Years Ago

Hello Wochi, What I do not understand with you is you come on to the Forum for...

The Fibreglass King - 11 Years Ago

[quote][b]The Fibreglass King (30/05/2014)[/b][hr] Hello Wochi, What I do not...

wochi - 11 Years Ago

I'm not totally totally sure if it matters, but if I were making it I would be putting the aramid...

Hanaldo - 11 Years Ago

Couple of things to think about are try a peel test between the Kevlar and the soric and the carbon...

f1rob - 11 Years Ago

This is why I love forums. Always something to learn! Was not aware of the bonding issues between...

Hanaldo - 11 Years Ago

doesntmatter what it is 90g satin/200g the bond on a Kevlar is always worse than anything else...

f1rob - 11 Years Ago

Now that´s a good discussion! Thanks a lot for all the help! So with the materials I have with me...

wochi - 11 Years Ago

I would be interested to hear more discussion on molding in the bracket hardware. There has been a...

BlackNDecker - 11 Years Ago

I've done some research & testing on this and the results are quite interesting. When I get some...

ChrisR - 11 Years Ago

[quote][b]ChrisR (16/06/2014)[/b][hr]I've done some research & testing on this and the results are...

BlackNDecker - 11 Years Ago

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