CTE and elastic modulus of epoxy resin and AS4 carbon fiber as a function of temperature

[gianlucaelle]

Hello,
I am struggling to get data for the transverse CTE and modulus of AS4 carbon fibers and Hexcel 8552 epoxy resin as a function of temperature. Do you know where could I get such data?
Thanks for your answer.

 

[RPstress]

HS carbon/epoxy is about 30e-6 strain/°C across the fibres of a UD ply.

This is typically measured by companies qualifying material, and so is hard to find outside copyright.

Toray has a number for their T700 fibre at

http://www.torayca.com/en/techref/index.html

section 7 "Functional and Composite Properties". (37.5e-6/K.)

You might find something at the NIAR website

http://www.niar.wichita.edu/agate/.

 

[RPstress]

Nothing at NIAR that I could spot (I was actually looking for some glass info so my eyes may not have been correctly attuned).

There's some numbers in this paper for carbon/PEEK. Looking at PEEK's properties the results won't be mile out from epoxy.

 

[mmhaynes]

Not really a sales pitch here, but we can do that experiment for you. What type of temperature range are you looking for? We perform CTE tests via a comparative strain gage technique from 4 K to 390K.

Mark Haynes
Senior Engineer
Composite Technology Development