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SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817

New Tech Creates One Tough Carbon Fiber

07/23/2015 7:56 PM

"The gel-spun carbon fiber produced by Kumar's team was tested at 5.5 to 5.8 gigapascals (GPa) - a measure of ultimate tensile strength - and had a tensile modulus in the 354-375 GPa range. "

""This is the highest combination of strength and modulus for any continuous fiber reported to-date," Kumar said. "And at short gauge length, fiber tensile strength was measured as high as 12.1 GPa, which is the highest tensile-strength value ever reported for a PAN-based carbon fiber.""

Finally a material worthy of Superman's cape!

I have included a converter calculator for conversion of gigapascals to psi, or whatever measurement you happen to be familiar with....

http://www.pddnet.com/news/2015/07/new-method-improves-strength-modulus-carbon-fibers

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bullardrr
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Join Date: Mar 2014
Posts: 373
Good Answers: 2
#1

Re: New Tech Creates One Tough Carbon Fiber

07/25/2015 8:44 AM

We first used carbon fiber in reinforced concrete strengthening about 12 years ago. Its ultimate tensile strength and Young's Modulus were about the same as prestressing strand (2 and 200 GPa, resp.). It is an impressive material for the structural engineer, allowing us to do some feats that a generation ago were beyond reach.

The main drawbacks in reinforced concrete applications are the limited bond strength/modulus of adhesives and fire/heat intolerance for surface mount, some alkalinity vulnerability, unforgiving cross fiber shear weakness and lack of ductility. I can foresee wind machine builders being among the first to use the 5+ GPa material in their FRP blades.

Thanks for this important posting.
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