Do carbon frames become more flexible over time?
10-30-12, 07:30 AM
#26
I eat carbide.
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The others are made out o that stuff that holds our beer. I can totally crush one of those cans so I assume the same will happen to those planes.
I'm joking of course.
I totally can't crush a beer can.
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10-30-12, 08:05 AM
#27
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And to throw a wrench into the carbon fiber on commercial jets argument, the wings are designed to flex. So, engineers want the carbon fiber to move. We are all doomed. Exploding bikes and jets. What's next? Golf clubs?
10-30-12, 08:08 AM
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Carbon fiber beer can would rock!
10-30-12, 09:59 AM
#29
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I predict this thread will last 7 days and reach 150-200 posts. It has, after all, been a couple of months since this topic was last thrashed. https://www.bikeforums.net/showthread...d-long-lasting
10-30-12, 05:41 PM
#30
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The changes in layup techniques, frame shape, and resins account for large changes in the stiff "feel" of newer frames. Enough that it can be easy to get off of a frame from 3-5 years ago and get on a new one and mistakenly assume that the old one had "gone soft" because the difference in feel is just that drastic.
10-31-12, 02:11 AM
#31
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10-31-12, 08:08 AM
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This is why I replace my CF bikes every month. The additional flex is just killing my commute time by the end of the month, I'm considering replacing the frame every 3 weeks now...
10-31-12, 08:19 AM
#34
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10-31-12, 08:37 AM
#35
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10-31-12, 09:27 AM
#36
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10-31-12, 09:59 AM
#37
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You are wrong. Just because steel has a theoretically infinite lifespan doesn't mean that time and wear and tear don't take a toll. There is nothing magical about steel. Unicorns aren't real either. Sorry for the loss of your innocence on this matter.
10-31-12, 10:52 AM
#38
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Been away from BF for a few months now. So this is a theoretical discussion about the flexing of CF frames whether they be on bikes or planes and how this relates to steel and aluminum and whether or not Psimet2001 can crush a beer can.
What a relief to see things haven't changed much.
What a relief to see things haven't changed much.
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10-31-12, 11:07 AM
#40
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Been away from BF for a few months now. So this is a theoretical discussion about the flexing of CF frames whether they be on bikes or planes and how this relates to steel and aluminum and whether or not Psimet2001 can crush a beer can.
What a relief to see things haven't changed much.
What a relief to see things haven't changed much.
10-31-12, 11:09 AM
#41
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But I don't see this as bad news. How else can I justify to my wife I need to "replace" my bikes?
10-31-12, 03:05 PM
#42
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Been away from BF for a few months now. So this is a theoretical discussion about the flexing of CF frames whether they be on bikes or planes and how this relates to steel and aluminum and whether or not Psimet2001 can crush a beer can.
What a relief to see things haven't changed much.
What a relief to see things haven't changed much.
11-02-12, 10:02 AM
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11-02-12, 10:26 AM
#46
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My CF feels the same after 50,000 miles. CF/epoxy laminate is the most fatigue resistant material in use for bike frames. Doesn't mean that a crappy laminate won't go bad. The Chinese are getting better at it, though. My bike was laminated in the USA.
11-02-12, 02:35 PM
#47
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I wonder why they don't fill monocoque CF frames with some sort of lightweight, expanding foam material that might make them just a bit more resistant to lateral impacts and give them a bit more stiffness....They did it with downhill skis since they mostly moved on from wood as their cores.....but I guess the weight weenies will protest if such is done on their bikes...
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11-02-12, 02:44 PM
#49
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I wonder why they don't fill monocoque CF frames with some sort of lightweight, expanding foam material that might make them just a bit more resistant to lateral impacts and give them a bit more stiffness....They did it with downhill skis since they mostly moved on from wood as their cores.....but I guess the weight weenies will protest if such is done on their bikes...
Chombi
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11-02-12, 03:13 PM
#50
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Foam works great in the short run as it tends to degrade rather quickly, in few years is just dead weight.
