Kilka cytatow Chuck Teixeira R&D manager Specialized:
Wlokno weglowe jest niezniszczalne:
“We just about never see a failure or fatigue. Once you hit expected ultimate strength, the fatigue is like a gimme. If you subjected any type of metal frame—including titanium—to the same total cycles, typically they would not withstand it. It’s quite amazing.”
Kolosalne znaczenie ma zywica i jakosc jej zastowowania:
“If the resin is not fully cross-linked, then it compromises its ability to withstand the elements and to also hold up with time. There’s a way we can tell in the laboratory but for the end user it’s really impossible for them. We can do a failure analysis that can actually tell whether the resin is fully cured or not.”
Kompozyt sie tam kiedys zmeczy ale watpliwe zeby to bylo wyczuwalne:
“The epoxy matrix will at some point start to form little cracks,” explained Chuck Texiera, “and then over time it will just have the connectivity of the fibre. So really what’s happening, over really extended periods of time, you can expect the stiffness of the frame to change ever so slightly but it’s such a small number. We can measure it but I really wouldn’t think it would be perceivable. But it takes hundreds of thousands of cycles to even get to that. Two years would be far too short for that to occur with any kind of typical age group racer.”
UVA nie ma wplywu:
“Most epoxies and resins today are extremely good. I’m sure you could find some place like the moon where really high radiation levels could burn off all the resin. Bikes are typically painted with UVA-resistant paints, even if they’re clear-coated. Then the resins have a certain UV-tolerance as well.”
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