Carbon Roof Interest Thread...

phelan · 11-22-2011, 12:58 PM

Well if I understand what they want to do with this, they're talking about completely removing the top and replacing it with CF. I'd think the localized impact would be pretty bad for CF, especially if you get unlucky and hit it dead nuts in the middle of a weave, where strength is lowest. Yield strength numbers are nice for pressure containment and fatigue, but not for impacts.

I may be wrong, however. Haven't really thought it through yet.

bullitt5897 · 11-22-2011, 04:07 PM

Impact Strength will come down to the layers and how they are stacked... typical parts are laid with a 90 degree process where the pattern matches with each layer. While structural parts are laid in a Quasi-Isotropic process which is a diagonal 45 degree pattern:
Ex: of layers...

View Poll Results: which pattern would you want?
2x2 twill weave	16	69.57%
Plain weave	1	4.35%
V 4x4 twill weave	2	8.70%
Checkered board F1 style weave	4	17.39%
Voters: 23. You may not vote on this poll

11-22-2011, 12:58 PM	#16 (permalink)
phelan A True Z Fanatic Join Date: Apr 2009 Location: CA Age: 38 Posts: 9,513 Drives: Scoobaroo Rep Power: 3406	Well if I understand what they want to do with this, they're talking about completely removing the top and replacing it with CF. I'd think the localized impact would be pretty bad for CF, especially if you get unlucky and hit it dead nuts in the middle of a weave, where strength is lowest. Yield strength numbers are nice for pressure containment and fatigue, but not for impacts. I may be wrong, however. Haven't really thought it through yet. __________________ 凛 ('Rin') - 2009 Nissan 370Z With silence comes peace. With peace comes freedom. With freedom comes silence.

11-22-2011, 04:07 PM	#17 (permalink)
bullitt5897 Premium Member Join Date: Jan 2009 Location: North GA Posts: 6,831 Drives: Twin Turbo Z34 Rep Power: 3682	Impact Strength will come down to the layers and how they are stacked... typical parts are laid with a 90 degree process where the pattern matches with each layer. While structural parts are laid in a Quasi-Isotropic process which is a diagonal 45 degree pattern: Ex: of layers... __________________ *Shop Cars: 2013 318whp Nismo VspecII 370z SOLD, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054*

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