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Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 20:20
by louish49
Doing my A-level physics coursework, and i'm probably just being a bit thick/suffering from tiredness, but why is having a high Young's modulus important for a material that will make the best part of the car?
any help will be greatly appreciated
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 20:51
by xxChrisxx
Should we really be doing your homework for you? You must have done at least some research and investigation for this.
What do you think?
Also just as a hint, the premise of your question is wrong.
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 21:00
by flynfrog
louish49 wrote:Doing my A-level physics coursework, and i'm probably just being a bit thick/suffering from tiredness, but why is having a high Young's modulus important for a material that will make the best part of the car?
any help will be greatly appreciated
do you have any grasp of basic vehicle dynamics? OR at least why chassis stiffness and light weight are important?
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 21:07
by xxChrisxx
flynfrog wrote:louish49 wrote:Doing my A-level physics coursework, and i'm probably just being a bit thick/suffering from tiredness, but why is having a high Young's modulus important for a material that will make the best part of the car?
any help will be greatly appreciated
do you have any grasp of basic vehicle dynamics? OR at least why chassis stiffness and light weight are important?
Why would you need to?
As it's written it's a pure materials question, and that doesn't have to relate to racing cars. Also as asked, it shows a lack of understanding about why you would select a material based on it's properties. It may just be a poorly worded question.
It's also worrying that someone has come on to a forum ask for help with coursework, without demonstrating that they have done any work themselves. Especially with the obvious urgency of the OP.
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 21:10
by flynfrog
xxChrisxx wrote:flynfrog wrote:louish49 wrote:Doing my A-level physics coursework, and i'm probably just being a bit thick/suffering from tiredness, but why is having a high Young's modulus important for a material that will make the best part of the car?
any help will be greatly appreciated
do you have any grasp of basic vehicle dynamics? OR at least why chassis stiffness and light weight are important?
Why would you need to?
It's a pure materials question, and that doesn't have to relate to racing cars. Also as asked, it shows a lack of understanding about why you would select a material based on it's properties.
It may just be a poorly worded question.
I am confused as to why the chassis is the best part of the car when the wheel nut is far better.
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 22:23
by louish49
clearly you're all far too stuck up to help me.. theres nothing online about the actual reason why it needs to be stiff..
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 22:27
by Tim.Wright
Mate, there is so much information online regarding this its not funny.
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 22:33
by louish49
Tim.Wright wrote:Mate, there is so much information online regarding this its not funny.
i cant find anything.. and to the people saying i havent researched, i dont quite know what they're basing that on..
maybe im just looking in the wrong places.. any chance you could point me towards anywhere with the answer?
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 22:35
by Lycoming
http://lmgtfy.com/?q=youngs+modulus
http://lmgtfy.com/?q=stiffness
Seriously, you only need the first link from those two sources. You don't even have to scroll down. You don't even have to look at any of the other results.
You obviously either haven't searched, or did an exceedingly poor job of it.
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 22:39
by Tommy Cookers
louish49 wrote:clearly you're all far too stuck up to help me.. theres nothing online about the actual reason why it needs to be stiff..
for the last 30 years the rules have made F1 cars flat-bottomed, and forced suspensions to be very stiff
without an outstandingly stiff structure the cars behaviour could not be optimised
cfc has a very high E relative to its low density
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 22:39
by louish49
by why is it important in f1?!
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 23:04
by Lycoming
from the first result of the second link I posted:
"A high modulus of elasticity is sought when deflection is undesirable"
Now, where might that be true in an F1 car... If you can't figure that out on your own....
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 23:08
by louish49
Lycoming wrote:from the first result of the second link I posted:
"A high modulus of elasticity is sought when deflection is undesirable"
Now, where might that be true in an F1 car... If you can't figure that out on your own....
cant put it into physics words on this little sleep, no
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 23:14
by mep
You should fail your A-levels....
Re: Stiffness & Carbon Fibre
Posted: 14 Nov 2012, 23:25
by Lycoming
Well I didn't want to say it, but, yea.
If you plan to go to university, not working well enough to figure this out on little sleep will kill you. Besides, now you're asking me to just straight up give you the answer, which is kind of silly since I already have.