Timeline for Is T300 carbon fiber sufficient for a bike?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Dec 13, 2022 at 4:30 | comment | added | Therac | These strengths are for the FIBER, not for the resulting composite. Unidirectional composites are typically up to 60% as strong as the fiber. For bi-directional, best-case you get 30% (30% warp, 30% weave, and 40% epoxy). So a T300 tube is at best a match for high-strength aluminum. | |
| Dec 13, 2022 at 2:35 | comment | added | Zyleyus | @Barış Atasoy My numbers came from Columbus's catalogue, which should be the most common steels on a steel frame. Nonetheless increasing the diameter does inspire me. | |
| Dec 13, 2022 at 1:17 | comment | added | Mark | @Zyleyus, from the viewpoint of someone who broke a whole lot of metal in a previous job, I also find it nonsensical. Steel comes in a whole lot of grades, spanning an order of magnitude in breaking strength, and nearly as much for yield strength. | |
| Dec 12, 2022 at 15:11 | comment | added | Zyleyus | I guess you don't know Bastion Cycles either, they're great and you should have a look. They have cylinders extruding from the lugs, which means they apply epoxy on the inside of the tubes rather than let silver flow on the outside like a traditional steel lugged frame. So GF is not needed. | |
| Dec 12, 2022 at 15:10 | comment | added | Zyleyus | The term "carbon fiber is xx times stronger than xx metal" is kinda non sense for me from a engineering degree. If strong means tensile strength than accroding to the picture the other guy had put in his answer, 500 kpsi is only slighly over that of Aluminum, even less than Cromoly, not to mention the bike specific steels such as XCr which is aroung 1300. And those steel tubes are of less than a mil of thickness, which is hard to compare to a 2 mil carbon tube. | |
| Dec 12, 2022 at 13:40 | history | edited | Barış Atasoy | CC BY-SA 4.0 |
added 17 characters in body
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| Dec 12, 2022 at 13:34 | history | answered | Barış Atasoy | CC BY-SA 4.0 |