Laminate Sample #46: Birch Ply on Nomex with Dynel Sheathing
Ғылым және технология
This sample is an odd mix of materials that don't usually go together. Thin birch aircraft plywood forms the structural face sheets on some light Nomex honeycomb core. The ply is bonded to the Nomex with Gorilla Glue - a polyurethane wood glue. The plywood is then sheathed in Dynel fabric/epoxy and vacuum bagged. Dynel is a tough, high-elongation synthetic fabric that is excellent for puncture and abrasion resistance. Finally, one side is filled and primed, and an edge gets back-filled - just to show how.
I am really not sure where many of the materials here came from.
The Dynel is an off-cut from a boat deck that may have been purchased from Jamestown Distributors or Hamilton Marine - like 10 years ago.
The Nomex was likely surplus from any of many boat builds - but search eBay or similar sites and you can usually find it for reasonable prices as long as you don't need any paperwork.
Birch ply is available from model stores or places like Aircraft Spruce.
The TotalBoat Epoxy Putty is from Jamestown Distributors.
Пікірлер: 9
This was another excellent, multi-process/product tutorial. Thank you Brother 😎🎩♠️
You've tried a lot of combinations so far. Which one do you like the most for a universal structural application?
@ExploreComposites
Жыл бұрын
Oh I don't really have favorites - some are more interesting though! The problem with these materials is that there are so many variables that it's hard to pick a "best" - you can usually get to a workable solution from a bunch of different angles. Usually its manufacturing concerns that matter as much as materials - unless for a very demanding application where you can afford to do something difficult because some aspect of the product requires it. If I had to choose, I'd take infusion because it is so manufacturable, inexpensive and not messy. Add glass or carbon, some foam core, and common infusion resins - and you have a good place to start for many types of parts.
How well did the Gorilla Glue adhere to the Nomex? Does it hold up under flex tests? Does the wood splinter before the glue lets go?
@ExploreComposites
Жыл бұрын
I don’t know! Going to have to buy more than the absolute minimum quantity of ply next time! Its always nice to break stuff. My guess is that epoxy would be tougher and a better all around choice - but Gorilla may be adequate if enough is used - and probably lighter.
@sierraecho884
11 ай бұрын
@@ExploreComposites Also way cheaper and more natural than epoxy. I wouldn´t want to use epoxy and glasfiber etc. Wood neveere wood glue and shellac it all it takes.
I don´t get this really. What´s the purpose for this material ? Why so complex with additional coats of epoxy putty why not just paint over the previous layer with some PU varnish ? Are there tests being conduncted with this piece of material ? I am really confused.
@ExploreComposites
11 ай бұрын
These "laminate samples" are just a look at a bunch of materials and processes all bundled up into a square foot some something somebody might actually be able use. This one is a bit out there, but the combination of plywood skins with a honeycomb core is great for light stiff things where wood is ok. The Dynel is a good sheathing material - tough and abrasion resistant and shown here filled and primed to a paintable surface. Lots of the other samples are more common recipes, but I try to show something interesting in each one - a material, process or tool - sometimes maybe I try to pack too much into each one!
@sierraecho884
11 ай бұрын
@@ExploreComposites Ok now I get it. I have seen a couple of your other videos, well done. Interesting stuff. Have you tried something super low cost like corrugated board with resin ?