But you won't. Let's be real here. Yeah, lets gently remind ai spammers that they are truly helping but submitting bogus Issues, PRs, bug bounties, or whatever. Just like scammers from fake call centers, they are only in it for the money and hoping one hit sticks.
That is mostly true, PLA is ONLY biodegradable in a facility that can handle that. Your run of the mill recycling center in your city probably can't or won't take your PLA prints.
And then only if it's pure PLA with no additives. Which most PLA has to improve speed of printing or strength or some other property. In practice, I'd wager that 90% of commercially available PLA fillament is not actually biodegradable.
Props for doing the research and posting the links - I stand obviously corrected. I get why they did it, but it also leaves a bad taste in my mouth. :( Sigh.
HDT does, kind of, but that’s already covered by the load being defined for the various conditions. HDT is always defined at a specific load so it also does not change with load (since load is fixed).
Isn't Tg a poorly defined metric? It seems like thermoplastics will lose their strength as temperature goes up and there's no abrupt transition where there's a near step-change in behavior
I doubt there is any form of ABS filament with such a low glass transition temperature. As the original poster said, it was probably PLA.
I find it odd that the report didn't name the manufacturer of the part, and that the part was not listed on the LAA modification form. There can't be many people selling such parts at airshows, so you'd think the investigators would have been able to find out who made it.
Now I wonder if the previous owner (who installed the new fuel system) printed the part himself, then claimed he bought it overseas to avoid blame.
Maybe "load" includes the heat that comes from the changes forces from the vibrations? But even then, that would be additional heat sources, rather than a change in the temperature where it happens.
Polycarbonate shows little change vs pressure [1]:
"Two samples from the air induction elbow were subjected to testing, using a heat-flux
differential scanning calorimeter, to determine their glass transition temperature. The
measured glass transition temperature for the first sample was 52.8°C, and 54.0°C for the
second sample"
Yeah, they might have used ABS-CF filament, but unless they got it from a good brand that uses good resin and proper printing parameters, the actual Tg will be lower, plus the stress from the vibration/load could have made the part fail if it was not for the heat later in flight.
Polymaker's ABS is dubious too because it is blended with PETG. They are coming out with a Pro version that has a higher Tg and requires way higher chamber temps to print properly.
