+x

 

Tim Ane - 10/23/2020 5:34:28 AM

Hi everyone,
my question is about use of perforated aluminum honeycomb core. in my case, i am working with sandwich structure of honeycomb and carbon fiber prepreg bonded with epoxy adhesive film. will epoxy generate volatile during cure that will be trapped in honeycomb without perforation? or working with epoxy resin will not generate volatiles so non perforated honeycomb cores can be used?

Confusion is in between perforated and non perforated aluminum honeycomb cores used with epoxy in sandwich structure.

Thank You.

+x

 

Lester Populaire - 10/23/2020 6:36:38 AM

+x

 

Tim Ane - 10/23/2020 5:34:28 AM

Hi everyone,
my question is about use of perforated aluminum honeycomb core. in my case, i am working with sandwich structure of honeycomb and carbon fiber prepreg bonded with epoxy adhesive film. will epoxy generate volatile during cure that will be trapped in honeycomb without perforation? or working with epoxy resin will not generate volatiles so non perforated honeycomb cores can be used?

Confusion is in between perforated and non perforated aluminum honeycomb cores used with epoxy in sandwich structure.

Thank You.

Depends on the final application too. perforations are there too so the cells can vent to ambient pressure. But i don't think you are working on an high altitude reconnaissance airplane or a satellite structure?

So for most applications with epoxy you are fine with non perforated ones

+x

 

Warren (Staff) - 10/23/2020 8:13:12 AM

As lester says, at ambient pressure use the perforations make very little difference. Its only really specific high end applications that might need perforated honeycomb.