steel vs carbon... drive shafts
02-14-14, 08:21 PM
#1
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02-15-14, 03:59 AM
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I know the result is predictable but I still would've really likes to see how us aluminum riders fair in that test.. just to give us something pleasant to think about on those steep hills.
02-15-14, 05:17 AM
#6
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Now if only someone did the actual bomb proof road bike (as they do with many mountain carbon frames)
I get the feeling the carbon is there to save weight by I personally would like to have a carbon frame which would weigh more but have the added impact resistance. Then again would the resulting frame be too stiff....
Although I believe the current spesh crux evo might be the thing I am looking for. It does weigh a ton and is carbon.
I get the feeling the carbon is there to save weight by I personally would like to have a carbon frame which would weigh more but have the added impact resistance. Then again would the resulting frame be too stiff....
Although I believe the current spesh crux evo might be the thing I am looking for. It does weigh a ton and is carbon.
02-15-14, 05:27 PM
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the test was for shear tension for a rotating shaft. surviving impact force is something else entirely, given the high crystallinity of CF. but I thought the video was interesting nonetheless.
02-15-14, 07:22 PM
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Now if only someone did the actual bomb proof road bike (as they do with many mountain carbon frames)
I get the feeling the carbon is there to save weight by I personally would like to have a carbon frame which would weigh more but have the added impact resistance. Then again would the resulting frame be too stiff....
Although I believe the current spesh crux evo might be the thing I am looking for. It does weigh a ton and is carbon.
I get the feeling the carbon is there to save weight by I personally would like to have a carbon frame which would weigh more but have the added impact resistance. Then again would the resulting frame be too stiff....
Although I believe the current spesh crux evo might be the thing I am looking for. It does weigh a ton and is carbon.
02-17-14, 08:27 AM
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You know what would be hilarious... if they made a baseball bat out of carbon fiber! I bet it would shatter on the first hit!
02-17-14, 08:33 AM
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Carbon fiber Industrial couplings and driveshafts have been available for 20 years. They can be used in high-HP applications for cooling towers and other extreme applications. See: https://www.altratidal.com/shaft-couplings.asp
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When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
02-17-14, 09:10 AM
#11
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02-17-14, 09:13 AM
#12
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Carbon fiber Industrial couplings and driveshafts have been available for 20 years. They can be used in high-HP applications for cooling towers and other extreme applications. See: https://www.altratidal.com/shaft-couplings.asp
02-17-14, 09:35 AM
#13
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If the application can be done in steel, that will be the recommended solution, but only for cost reasons.
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When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
Last edited by Barrettscv; 02-17-14 at 09:39 AM.
02-18-14, 09:11 AM
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Well, it's no big surprise that the small diameter steel shaft failed at a fraction of the torsional stress of the large diameter carbon shaft. I'd love to see dimensionally equal parts tested.
02-18-14, 11:36 AM
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True, same with glass. It has a very high tensile strength, but it's very brittle. This test was specific for drive shafts, and you are correct in that the forces going into a bike frame are totally different.
