Assumed that assembly contained chemicals (in that case I would still stick to PTFE with an optimized filler suggestion)
Rodney Bennet
Learn more on CheFEM: Chemical interaction driven FEM simulation of advanced materials
http://www.composite-agency.com/CheFEM.htm
Dear Johnae
I agree with Steve Jones.
Note that short and long term coating behaviour in severe conditions can be simulated and analyzed using CheFEM (Chemical interaction driven FEM analysis of advanced materials). This will allow more systematic and completely independent evualuation of...
Hi Pedrof,
What is the exact type of Carbon that you are using? Depending on the application variations in size and shape will make a huge difference in creep, thermal expansion behaviour, etc.
In the operating conditions given I would - if possible - stick to PTFE matrix material.
Rodney...
The operating conditions requires rigorous material evaluation.
The preferable material is most probably reinforced epoxy, but exact epoxy and laminate build-up depends on the lifetime requirement, since the composite will defitenly age in the circumstances given.
More quantitive support can...
In case you would like to use the graphite as filler material, you may also want to look at:
http://www.composite-agency.com
They include graphite - matrix interactions in their FEM based analysis.
Kind Regards,
Rodney
You might want to check http://www.composite-agency.com/case-stories.htm, here you will find diffusion / hydrogen embrittlement assessment for several different materials.
Kind Regards,
Rodney
You might also want to check the diffusion-chemical-mechanical simulation forum at http://www.composite-agency.com/materials-forum.htm
They can look at steel-polymer-concrete structures in real life circumstances - in a fully integrated manner, and provide help via their open source facility...
Do you have temperature or mass diffusion gradients applied?
This could give rise to (additional) forces, and - in a cylinder configuration - to compressive forces. Check also the integrated diffusion-chemical-mechanical composites simulation at...
Nylon 66 may swell too much (of course depending on the conditions). My experience is that currently used carbon and glass fibres do not restrain the swelling loads. Although nano particles could restrain in certain conditions (see http://www.composite-agency.com/materials-forum.htm), but this...
Dear JPC10,
A lot of laboratory set-up and library data on this subject (including referenced moisture figures for various virgin, filled and composite materials) can be found at http://wwww.composite-agency.com
You may also try their forum on integrated knowledge of diffusion, corrosion and...
You may also want to check http://www.composite-agency.com/materials-forum.htm, specifically the thread on FBE epoxy coating by Neal Prescott: http://www.composite-agency.com/messages/3968.html
Regards,
Rodney
You may also check / post the forum at http://www.composite-agency.com/materials-forum.htm for additional information (such as proper modelling and intrinsic failure modes) on interfacial strength between different sorts of materials.
Regards,
Rodney
With regard to high temperature composite solutions you may also want to look at http://www.composite-agency.com/materials-forum.htm
Their integrated chemical-physical approach for material selection can be helpful.
Rodney
Maybe the following thread: Service Life of Pipe for Supercritical Saturated CO2 (http://www.composite-agency.com/messages/4758.html) is also of your interest.
Regards,
Rodney
