hi, a friend of mine said that carbon hoods could be dangerous. Cause if you i. e. hit a walker and he lands on your hood, it can easily break in hundrets of very sharp pieces, which may hurt a little bit...

Is that true?

 

ehahahhaha

 

If you're serious, no, it's not true. Quality carbon fiber hoods are very strong. For a demo, go to fiberimages.com, they have video footage of their carbon hoods strength.

 

tell your friend ceramic hoods dont exist

 

Twice the strengh as steel, half the wieght of aluminum. They make Formula 1 cars out of this stuff so I don't think that is is possible for that to happen, unless it was purchased from APC.

 

 

never seen but heard that they can come loose under hi wind conditions...ive seen regular hoods fly up and off a car cant imagine a cf hood being much better...

 

haahahahahahahahahahahah
haahahahahahahahahahahahah

thats is the greatest picture ever


[Modified by D16BlackHatch, 1:20 AM 8/16/2002]

 

Well if this Walker hit a CF hood, it might actually break...

 

He'd Karate-chop that **** to bits!

Alex

 

what about this walker...

 

To actually respond to your question... despite the "well, you can drive a car over them" reply, I have heard of cf hoods shattering when involved in front collisions. The alternative seems to be that the hood seperates from the supports and travels towards the driver. This is a much bigger saftey concern. There was a thread on it in the roadrace/autox forum, I will try to find it and link it.

 

Aren't carbon fiber products made to shatter upon impact? I know that F1 mostly CF monocoque except for the engine. There are 3 reasons:

1) lightweight
2) stronger than aluminum/steel/what have you
3) upon impact, CF shatters so that the energy is taken out on the CF parts and not transferred to the driver, therefore lessening the injury or even preventing it.

 

that is so wrong

 

Freakin MOMMA's boy... You know what's also dangerous? Driving.

 

dude dont hit anyone

 

hey, don´t attack me

i didn´t believe him too. i just wanted to be sure

 

i seriuosly don't know whats wrong with you ppl.. the guy is just asking a question
don't have to be a ******* ******* about it. just answer his question, and das it.
no biggy

 

"i seriuosly don't know whats wrong with you ppl.. the guy is just asking a question
don't have to be a ******* ******* about it. just answer his question, and das it.
no biggy"

if u cant hang, get out. damn noobs

and it all depends on the manufacturer, to answer ur ?. fiberimage may make the hood for strength, other company may make it for what the other guy said about absorbing the initial impact and let it shatter. anyways u intend to hit someone or what? j/k

 

what about warpage.... is that a concern? under heat and all that is?

 

Is it Me, or does his helmet say "JDM" BWuhahahahaha.

 

When carbon fibre breaks, it doesn't shatter like glass. Think about this, it is made the same way as fiber glass. It has sheets of the fabric that are glued together.

When carbon breaks it turns into like broom bristles. Ever seen a carbon drive shaft break? It just rips the fabric.

Kenton

 

Reason why carbon fiber hoods are not dot approved is because in a front end collision, instead of "bending" like a regular hood does, the fiberglass/carbon fiber hoods actually "shatter". Mind you the carbonfiber hoods are very strong (it supported me and my friend on top of it with no problems), but when it shatters at very high speeds many people think it can go through the windshields or just shatter all over the place and hitting innocent bystanders or anyone that has their windows down.

Oh yeah, reason why me and my friend was on top of the hood was because I flipped my car and it was already messed up. The hood suffered tons of scrapes etc so it wasn't worth salvaging but, it did not crack at all nor even flex or anything.

 

You chemistry people please point out any errors in my statement:

Since carbon chemically always wants to use up all of its six availible bonds, it can combine in many different ways with itself. Carbon fiber/graphite is chemically formed in the same lattice structure as a crystal. The structure of the carbon is what makes it so strong but an out of plane load can cause it to fail. Another factor in the construction of carbon fiber components is the pressure that the layers of carbon were joined at. F1 chassis are put in an autoclave at around ~200psi so carbon comes out very dense. I do not know the pressure or construction methods for a carbon fiber hood but I could surmise that it is not in an 200psi autoclave otherwise you would be payiing alot of money for them. So here is my amature conclusion:

F1 components: carbon fiber is a high density offering the most strength but the shearing force during failure causes it to shatter like glass.
Carbon street hoods: carbon fiber is at a lower density offering less strength but the shearing force during a frontal impact allows it to give more but the carbon can still shred and create unfriendly shards of material.

 

don't hit no one