Kevlar Honeycomb Core

[ajalini]

Hello everyone
I work for an aircraft manufacturer and one of our suppliers is suggesting to use Kevlar honeycomb core to manufacture the floor panels (in lieu of Nomex core).
I personally don't have an issue with it but i don't have any data regarding repairability of kevlar honeycomb core.
My questions basically are 1) Is it as straight forward as repairing a Nomex core and 2)Is kevlar honeycomb readily available for in-field repairs?
Thank you for your input

 

[berkshire]

The properties of Kevlar honeycomb are improved compared to Nomex, This should not be a problem in new manufacture where the improved properties can be taken into account. It might be a problem if Kevlar is substituted for Nomex in a repair, due to the better properties of Kevlar. As far as doing an in field repair with like materials, it would be a potted in repair anyway. If you are making these parts then you should make repair materials available to your customers.
B.E.

You are judged not by what you know, but by what you can do.

 

[ajalini]

thank you Berkshire!

 

[RPstress]

This attached doc has some comparative bumf from about 15 years ago from one of our suppliers. Then it was $55/lb, cf. Nomex at $30/lb. See also advice from DuPont at

http://www.foradenizcilik.com/kutuphane/wp.pdf

; N636 may have a lower peel strength than Nomex. We've used N636 for new design for the weight save (5056 (or even 5052) Al is lighter, but people don't much like metallic core for external structures or toilet compartments, etc.).

 

[ajalini]

thank you guys. you've been very helpful!