Talk Composites - The Forum for Advanced Composites

aramid honey comb

http://www.talkcomposites.com/Topic33328.aspx

By carlton jacobs - 7/17/2019 4:51:34 PM

Hi,
I want to make my model boat hull using the carbon prepeg and aramid honeycomb sandwich method.
I  need to fill the honeycomb cells with epoxy in various places were i have penetrators or high stresed load areas so i need to do it in stages.
what is the best lay up sequence ?
should I lay and cure the outer skin with peel ply
then vacuum the honeycomb on after using adhesive film?or a wet lay of epoxy,
then cured fill the aramid cells with epoxy were needed.
Then apply the prepeg outer skin last without any adhesive.

Or can i lay up the outer skin and honeycomb in one go.
would this give the outer skin a good finish.
ive looked all over the net for the pre peg honeycomb method but have had no luck,
lease advise me the best sequence.
By f1rob - 7/19/2019 8:09:52 PM

 
carlton jacobs - 7/17/2019 4:51:34 PM
Hi,
I want to make my model boat hull using the carbon prepeg and aramid honeycomb sandwich method.
I  need to fill the honeycomb cells with epoxy in various places were i have penetrators or high stresed load areas so i need to do it in stages.
what is the best lay up sequence ?
should I lay and cure the outer skin with peel ply
then vacuum the honeycomb on after using adhesive film?or a wet lay of epoxy,
then cured fill the aramid cells with epoxy were needed.
Then apply the prepeg outer skin last without any adhesive.

Or can i lay up the outer skin and honeycomb in one go.
would this give the outer skin a good finish.
ive looked all over the net for the pre peg honeycomb method but have had no luck,
lease advise me the best sequence.

Probably best in 2 shots but depending on your material you can give the 1st skins a warm debulk before the core for a fairly hood finish in 1 hit.
Why fill the core with resin ? Debulk your core down onto the film glue, then you can cut out the core in your fixing points an add an insert in ply,ali or solid carbon ply pack.
Unless it's a core bondable cloth like mtm28B you will still need a film glue on top of the core got your 2nd skins