Whoever has used that style of fabric for infusions.
I have some 0/90/±45 cloth that I want to make into panels with 1/8" foam core.
Has anyone tested how strong 2 layers would be, with a core? I onlyhave enough for 2 layers per panel, maybe adding some uni. as “spars” in the middle. Dunno if I should wait till I have more fabric, or just do it.
Just wait until you have the amount of materials needed to do it right.
All of the fiberglass we use is multi axial non-woven. Much stronger than woven, and a nice back side finish.
I ended up just doing it, since I had the time. Added some woven roving between strips of core to the backside in a cross. I figure that will add a good deal of strength.
I SHOULD be unmolding it now, but too much paperwork this morning 
Any woven roving used in vacuum infustion process, may be problematic, unless resin is thin enough to competely wet out the fabric.
well 95% of material we use in VATRM around here is woven roving, so i hope it isn’t a problem.
The problem I DID have, was the damn Lexan/Plexiglass tool surface I used reacted with the Derakane 510 VER. It melted the plastic, which made the VER not infuse correctly, giving me with a pretty, but dry surface. Now I have to paint on more epoxy and rebag it on a new fiberglass tooling surface.
Fun.
The panel though, is bloody strong. I don’t think I even need the CORE!
bump
so yeah, that stuff doesn’t infuse well.
I ended up with:
-45
90
+45
0
0
+45
90
-45
The +45 layers didn’t infuse. When I trimmed the edges off, it delamed like crazy. The panel as a whole seems to have worked, but I’m not sure without destroying it.
Going to pull the next panel off today, where I did a longer cure time, and left a gap in the infusion media to see if I can let the resin catch up.
What doesn’t infuse well? Your +/-45* plies didn’t wet out? Seems very strange that just the orientation made it not wet out fully.
You are using multi-axial NON woven?
i’m assuming this is the carbon that was for sale in the marketplace? If so, it is non woven. Wouldn’t you expect the 0 or the 90 (depending on the direction of infusion lines) to not properly wet out? I wouldn’t expect the 45’s to be the problem…
I’m making small parts out of the carbon fiber multi axial… two layers of that stuff then two layers of 2x2 twill using infusion… strong parts, that are a total of .060" thick, or 1/16". The more curves and bends the part has the stronger it is too - obviously.
Hopefully you are using the multiaxial in between the plies of twill for a balanced layup to avoid warping?
Yep one on each side of the laminate.
I don’t know if it’s the exact fabric that was being sold, but it’s from the same company. I got some old leftovers they wouldn’t be able to sell due to the age, but I’m just testing out infusion methods.
I would expect that the outside layers would infuse, and NOT the inner most. This is just crazy. I’ve tried 2 ways of infusing it, and the same thing happened.
I really think I should just thin out the epoxy like crazy and do that. Styrene can be your friend once and awhile!
how small, and what is your layer orintation like compared to your inlet/vent? I would think that the foamcore would be the issue, but it seems that my dry areas are on the outside edges, before the foam core!!
layup:
Multiaxial
(strip of woven roving under extra layer of foam)
Foamcore
Multiaxial
Tool
the resin flows thru my parts in any direction the same.