Are 3D printed fibre reinforced filaments strong enough for real engine parts ?

In this video I show you my experimental pressure tests with several carbon fibre engineering filaments and let the test samples explode at up to 12 bar or 174 psi.
If you want to support me and become a channel member you get access to exclusive content in the members area:
   / @myengines2443   A membership only costs 99 cent !
Thanks to Extrudr for sponsoring the ASA-CF filament, have a look at their products: https://www.extrudr.com
Thanks also to Diamant, look out for Dichtol at: https://diamant-polymer.com
Thanks to Baptiste (alias OfficialyMax) we now have a Discord server:
  / discord  
It would be very nice if we could discuss there everything about Stirling engines, 3D printing and more, thank you very much Baptiste.
To increase the performance of my Stirling engine, I need high-pressure-resistant 3D printed parts for the thermoacoustic gas cycle.
I printed many samples from different types of filament to test them with up to 12 bar air pressure.In my previous video, I already checked conventional materials such as PETG and ASA.Now I am trying out the carbon fibre reinforced engineering filaments PA 12-CF, PC/PBT-CF and ASA-CF and would like to find out if they give better results in the pressure tests.
In order for the thermoacoustic Stirling engine to seriously produce energy to support our solar plant, its power must be significantly increased.
I would like to achieve this by optimising the thermoacoustic gas cycle, pressure charging and the use of other working gases such as helium, among other things.
3D printing enables rapid prototyping of even the most complex components, which allows for fast development of the engine.
I have optimised my print settings and treatment with Dichtol, enabling me to reliably print pressure-tight parts using conventional materials such as PETG or ASA.With a wall thickness of 4 mm, these can withstand pressures of up to 10 bar.I received several rolls of fibre-reinforced engineering filaments from Extrudr to test and immediately printed many samples, which now have to prove if they are superior to conventional printing materials.
First, here are the results for the conventional, unreinforced filaments once again:With only one wall layer and a material thickness of 2 mm, I had major tightness issues with PETG, and the layer adhesion failed at 3 bar.
ASA exploded spectacularly at 4 bar and PLA burst at 8 bar, causing the filament itself to tear.With 4 wall layers and a material thickness of 3 mm, ASA exploded at 8 bar and with 10 per cent over-extrusion at 10 bar.
PETG leaked at 11 bar or burst into many small shards.
Now it's time for the carbon fibre-reinforced engineering filaments with 3 wall layers and a material thickness of 2 mm.
ASA-CF exploded cleanly between the layers at 11.5 bar.
PC/PBT-CF remains completely leak-proof up to a maximum pressure of 12 bar.
PA 12-CF can also withstand overpressure of up to 12 bar.
Unfortunately, I am unable to achieve pressures higher than 12 bar, which would give even more meaningful results.
Overall, carbon fibre reinforced engineering filaments show higher compressive strength with thinner wall thicknesses, which is probably mainly due to better layer adhesion.
So I will probably manufacture my high-pressure components for the thermoacoustic Stirling engine from carbon fibre-reinforced PA-12 or PC/PBT.
These materials have made the best impression on me and achieved the best results in the pressure tests.
Many have reported probleIt would be very nice if we could discuss there everything about Stirling engines, 3D printing and more, thank you very much Baptiste.ms with water absorption and brittleness in the long-term usage of untreated PA printed parts.
My tests will also provide insight into their long-term suitability.
I am curious to see how sealing with Dichtol will prevent long-term problems with printed nylon.
Now I'm going to print some components for the Stirling engine and hopefully report back soon with successful results.
As always, I look forward to your comments on Discord or here on YouTube!

Thanks for watching!

Thanks for the background music:
Song: Jim Yosef - Eclipse [NCS Release]
Music provided by NoCopyrightSounds
Free Download/Stream: http://ncs.io/eclispe
Watch: • Jim Yosef - Eclipse | House | NCS