Thingiverse
Flexural Test Specimen - ISO 178 / ASTM D790 by MichaelCarewDesign
by Thingiverse
Last crawled date: 3 years ago
Carbon fiber filament arrives today and I wanted to see if this stuff is REALLY twice as stiff as ABS.
I am building a simple test stand to determine young's modulus of Proto Pasta's 15% short fiber pla. Will post results.Update
I printed the carbon fiber ISO specimen at 200C on a clean glass bed at 60C. Adhesion was perfect and it did not warp at all. Contrast that with the regular PLA sample that lifted slightly on both ends. (After all the aspect ratio is quite high)Results
Black PLA - 3.312 GPa
Carbon Fiber PLA 5.248 GPa
CF version is ~60% stiffer
Proto Pasta has a value that is a bit higher, I expected to have some error because of how flimsy my bootleg setup was. I believe that the published value of 6.5 GPa is right on.
I think this has some great uses on rep rap designs (optimized I-beam for delta bots anyone?) and definitely quadcopter trusses/airplane wings. However, be aware of how brittle this filament is. It breaks cleanly and suddenly with no stress whitening. It is not well suited to take impacts.
-Michael
I am building a simple test stand to determine young's modulus of Proto Pasta's 15% short fiber pla. Will post results.Update
I printed the carbon fiber ISO specimen at 200C on a clean glass bed at 60C. Adhesion was perfect and it did not warp at all. Contrast that with the regular PLA sample that lifted slightly on both ends. (After all the aspect ratio is quite high)Results
Black PLA - 3.312 GPa
Carbon Fiber PLA 5.248 GPa
CF version is ~60% stiffer
Proto Pasta has a value that is a bit higher, I expected to have some error because of how flimsy my bootleg setup was. I believe that the published value of 6.5 GPa is right on.
I think this has some great uses on rep rap designs (optimized I-beam for delta bots anyone?) and definitely quadcopter trusses/airplane wings. However, be aware of how brittle this filament is. It breaks cleanly and suddenly with no stress whitening. It is not well suited to take impacts.
-Michael
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