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Kevlar thread is very thin. Blue laser cures to depth too.
Graphite isn’t added to materials with the expectation of improving strength, rather that it will improve wear, reduce friction and impart enough conductivity to eliminate static buildup.
I work at the "Institut für Flugzeugbau" (roughly translated "Institute for aircraft construction") at the University of Stuttgart (only as an assistant, while I'm studying, I might add)
We experiment a lot with fiber reinforced plastics, especially from carbon fibres.
I was about to suggest this topic as a possible bachelors or masters thesis, but seeing the difficulties you had, I think producing viable results might not be as easy, as I thought.
if its a brittle but very strong material adding fibers would make it handle stress better and less prone to cracking
Maybe different kinds of saw dust would work. I'd think the resin would be able to saturate the fibers.. you may not have the aggregate "boundary" issue mentioned below.
Does this resin material have acid resistant properties? is not, can you suggest any resin which have acid or base resistant properties?
i think the main problem is that air is being trapped by the particles you are adding in. this would greatly decrease integrity of the cured resin.
The glass fibers are clumped together because they're coated in something called a sizing agent. Sizing agents are essentially coatings that cover the fibers. Because glass fibers are chemically inert they will not bond with any kind of resin or epoxy matrix. These sizing agents have two fold benefits, they allow for this chemical bridge (aka a coupling agent, for glass fibers it's typically a silane) to bond to matrices and add a protective layer to the outside of the fibers for easier handling. They also bond the fibers together, that's why its so hard to pull the individual fibers apart, they're essentially glued together. That being said you can just sonicate the fibers to loosen and separate them.
Your printers resin vat wasn't tightened down and was being pulled up with the build plate
I'm more familiar with steel than polymers, but in steel there are very hard carbides, kind of like like rocks in concrete. When the steel breaks, cracks jump from carbide to carbide, kind of like ripping a perforated page from a notebook. So the more and larger the carbides the more brittle the steel.
One year late: put the fiber flakes in a ultrasonic bath to seperate them!
Most composites are made under pressure. Autoclaving helps push the air out making the composite more solid and less microfractures.
These results make sense…the strength of resin comes from the cross-linked polymer chains. Any foreign fibers you're adding just means there are fewer of those chains, and those fibers are stronger when locked together than chopped up and mixed with a foreign substance. The graphite did look cool though.
Ugh, cracked LCD…good case for always feeling the tank for any debris before printing.
Just for kicks and Giggles you should try adding fine powder glitter, I highly doubt it will make any parts stronger but it might yield some very interesting visual effects
How about something weird, like long politer chain non-foaming shaving gel?
Try Cabosil. We used that in fiberglass resin and I was wondering how well it work with the printers.
try aluminum powder
8:30 TOM YOU FORGOT TO SCREW DOWN YOUR VAT…. T O M ! ! ! !
I can feel cotton dust in my nose, not a fun material to play with.
I did experiment with some aluminium powder. Looked great, didn't test strength… ( Nano Clear, FunToDo resins. I work there…)
it looks like your vat was loose during 5%
I am curious to see what effect these materials would have on temperature resistance.
Im using UV-waterwashable resin and babypowder to create some cheap sort of mod podge for fixxing model and fill in gabs
The main goal for my prints is to have impact resistance. So in a way I'm thinking making the resin softer rather than "stronger" Perhaps some kind of soft material like rubber or the silicon powder from makeup would create a finished print that would flex slightly instead of snapping when hitting the floor.
Is it me or does the graphite 5% video look like the whole vat is lifting?