Why are'nt there any carbon fibre fuselages ?

[Gray E Fowler]

Doug

Other materials cannot impart  less brittleness to CF.  Kevelar is tough 
but compression strength is a fraction of CF. So when you crash, CF breaks 
and kevelar compression crushes like an accordian. Kevelar will actually 
fail at much less of an impact. But then again we are not supposed to 
crash-are we?
The highest modulus material will carry the strain.



Gray Fowler
Principal Chemical Engineer
Composites Engineering




"Doug Cronkhite" <seefo at san.rr.com>
Sent by: discussion-request at nsrca.org
03/23/2005 09:52 AM
Please respond to discussion

 
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        Subject:        RE: Why are'nt there any carbon fibre fuselages ?


I'm sure someone will correct me if I'm wrong but isn't CF alone somewhat 
brittle when in a layup without some other material to provide 
flexibility? 
 
-Doug
 
 

From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On Behalf Of Hitesh Gajjar
Sent: Wednesday, March 23, 2005 7:42 AM
To: discussion at nsrca.org
Subject: RE: Why are'nt there any carbon fibre fuselages ?

Ok, I get it, cost and strength vs stiffness and the balancing act between 
the two. Thanks guys.

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