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Cold weather bad for carbon???

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Cold weather bad for carbon???

Old 09-16-11, 05:16 PM
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vuduchyld5
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Cold weather bad for carbon???

Hello everyone...May be a silly question- But do cold or harsh temperatures have a negative effect on carbon fiber frames or components in any way?
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Old 09-16-11, 05:22 PM
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No.




It will asplode!
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Old 09-16-11, 05:26 PM
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Old 09-16-11, 05:28 PM
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Really??? I am sorry, but this is a silly question.
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Old 09-16-11, 05:30 PM
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Check out https://www.bustedcarbon.com/

All those riders ignored the warnings and rode their crabon under 68 F temperatures
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Old 09-16-11, 05:32 PM
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Originally Posted by tagaproject6 View Post
No.

It will asplode!
I love one word answers, especially those without objective information. I can imagine a composite (carbon) being affected by water in freezing conditions especially if it is damaged and water gets in between the weaves. However, I don't think the average bike rider with carbon bike would have to worry unless they are riding their damaged bike at McMurdo or Resolute Bay, Nunavut.
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Old 09-16-11, 05:39 PM
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Originally Posted by Essex View Post
I love one word answers, especially those without objective information. I can imagine a composite (carbon) being affected by water in freezing conditions especially if it is damaged and water gets in between the weaves. However, I don't think the average bike rider with carbon bike would have to worry unless they are riding their damaged bike at McMurdo or Resolute Bay, Nunavut.
Good!
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Old 09-16-11, 05:40 PM
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Originally Posted by Gluteus View Post
Good!
Butt!
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Old 09-16-11, 05:44 PM
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Originally Posted by essex View Post
butt!
huh!!???
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Old 09-16-11, 05:53 PM
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Originally Posted by bianchi10 View Post
huh!!???
Just word association when I read Gluteus and saw maximus. As per objective information - I've seen fiberglas boats (composites) take a beating in near freezing water as ice scours the gel coat off with minor quantities of water getting in between the weaves of the glass and resin. I can imagine that if someone really mistreats their carbon bike some de-lamination via moisture intrusion could occur degrading strength? What would be interesting is to see how dissimilar materials (dropouts) and carbon perform in below freezing conditions. That said - who rides a bike in crap conditions like that anyway? You'd be taking an all track vehicle, or Ski Doo instead.
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Old 09-16-11, 05:55 PM
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I think it depends on your average speed.

ps sorry about being a smartass. I believe the correct answer is "no," so ride more and worry less.
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Old 09-16-11, 06:00 PM
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OK - here's some objective information which says yes with an implication that temperature could be a exacerbating factor. That said - the advice given above is very appropriate. Worry less.

" Both UV radiation and moisture have adverse effects on the mechanical properties of the polymeric epoxy matrix, while the carbon fibers are not affected significantly by either environment. The polymer matrix in a fiber-reinforced composite serves to transfer applied loads to the reinforcing fibers and provide interlaminar shear strength, whereas the fiber– matrix interface governs the load transfer characteristics and damage tolerance. Thus, both
these components represent weak links in fiber-reinforced composites and upon degradation, lead to reduced damage tolerance, and thus, lack of long-term durability."

BHAVESH G. KUMAR, RAMAN P. SINGH* AND TOSHIO NAKAMURA
Department of Mechanical Engineering
State University of New York
Stony Brook, NY 11794, USA
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Old 09-16-11, 06:42 PM
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Carbon Fiber cannot, repeat, cannot be exposed to any thing + or - 72'F (22'C) or it will self destruct. This stuff is totally FRAGILE!
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Old 09-16-11, 06:44 PM
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Originally Posted by vuduchyld5 View Post
Hello everyone...May be a silly question- But do cold or harsh temperatures have a negative effect on carbon fiber frames or components in any way?
Just curious? Do you have many nervous habits? You know, licking light sockets or pissing on cow fences? Eat many crayons when you were young?
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Old 09-16-11, 06:48 PM
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Whats the temp at the new 787s cruising altitude. It made mostly of carbon fiber.
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Old 09-16-11, 06:55 PM
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Yup, I think if boats and areoplanes and F1 cars made of carbon fibre can survive, I doubt the humble bicycle is going to have too many problems.
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Old 09-16-11, 06:57 PM
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Hmm, I'm perplexed by the dismissive and borderline condescending responses here...

I know you all are trying to be humorous (failing I might add) but it is somewhat of a legitimate question and warrants a real response. Anyone who has used equipment prone to cracking in severely cold weather can attest to the possibility of increased risk of breakage during winter cold. For instance, I used to play lacrosse and it was well known that during particularly cold weather it was MUCH more likely that we would break the head of our stick when slapping other players sticks. The plastic got cold and was much more brittle. So really, it isn't silly to question if carbon becomes more brittle and prone to break during the winter as well....
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Old 09-16-11, 07:24 PM
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Almost all materials become more brittle as temperatures lower. The effect is generally null until sub-freezing.

The real question is, what weakens more: carbon, aluminum, steel, or titanium?
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Old 09-16-11, 07:39 PM
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Originally Posted by EdIsMe View Post
Almost all materials become more brittle as temperatures lower. The effect is generally null until sub-freezing.

The real question is, what weakens more: carbon, aluminum, steel, or titanium?
Exactly... I wouldn't be any more concerned about carbon as I would my aluminum or steel bikes (in fact, I would be less concerned, as I would imagine that metal's more rapid heating and cooling would cause greater differences in expansion/contraction from one spot to another, making it more at risk).
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Old 09-16-11, 07:44 PM
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I have ridden my carbon bike in temps as low as 10 F with no problems. Perhaps in a crash it might be more prone to fracture.
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Old 09-16-11, 07:47 PM
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Originally Posted by HokuLoa View Post
Hmm, I'm perplexed by the dismissive and borderline condescending responses here...

I know you all are trying to be humorous (failing I might add) but it is somewhat of a legitimate question and warrants a real response. Anyone who has used equipment prone to cracking in severely cold weather can attest to the possibility of increased risk of breakage during winter cold. For instance, I used to play lacrosse and it was well known that during particularly cold weather it was MUCH more likely that we would break the head of our stick when slapping other players sticks. The plastic got cold and was much more brittle. So really, it isn't silly to question if carbon becomes more brittle and prone to break during the winter as well....
...well sure. Your lacrosse stick was made from thermoplastic. When cold, it got close to the glass transition temperature causing a large change in material properties.

Carbon bicycles are made from thermoset polymers which are already well below their glass transition temperature even in Phoenix in the middle of summer. They do not go through a significant change in material properties in freezing weather. Carbon composites routinely operate at temperatures below -40 in aircraft.
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Old 09-16-11, 08:05 PM
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Originally Posted by HokuLoa View Post
Hmm, I'm perplexed by the dismissive and borderline condescending responses here...

I know you all are trying to be humorous (failing I might add) but it is somewhat of a legitimate question and warrants a real response. Anyone who has used equipment prone to cracking in severely cold weather can attest to the possibility of increased risk of breakage during winter cold. For instance, I used to play lacrosse and it was well known that during particularly cold weather it was MUCH more likely that we would break the head of our stick when slapping other players sticks. The plastic got cold and was much more brittle. So really, it isn't silly to question if carbon becomes more brittle and prone to break during the winter as well....
Thank you very much HokuLoa! I appreciate those of you that gave me an honest and legitimate answer to my question...Some of us who are fairly new to cycling rely on those of you with more experience to help us with our genuine questions on here- At least that is why I joined this forum...And I am quite sure the applications of CF used on million dollar aircrafts and boats are EXACTLY to the same specs and standards used on my bicycle so I truly appreciate those comparisons as well...For those of you who insist on being smartasses...good luck with that- I am sure it will take you far in life.

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Old 09-16-11, 08:08 PM
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Originally Posted by ahsposo View Post
Just curious? Do you have many nervous habits? You know, licking light sockets or pissing on cow fences? Eat many crayons when you were young?
Nah- thanks for the reply...BTW-Nice avatar..Do you like boys, dolls, or just boy dolls?
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Old 09-16-11, 08:16 PM
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Originally Posted by EdIsMe View Post
Almost all materials become more brittle as temperatures lower. The effect is generally null until sub-freezing.

The real question is, what weakens more: carbon, aluminum, steel, or titanium?
CroMo Steel is good down to about -50C. Aluminum and Titanium don't have embrittlement problems at survivable temperatures for humans.
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Old 09-16-11, 08:44 PM
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Originally Posted by ahsposo View Post
Just curious? Do you have many nervous habits? You know, licking light sockets or pissing on cow fences? Eat many crayons when you were young?
I eat paste and find that lead paint tasted much better than the new stuff
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