Material Strength Test Sample
by rsilvers, published
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I am using this to compare Taulman 645 Nylon to Trimmer Line:
I print samples, then use three Carabiners to pull them apart, and see which one fails first. I recommend that you weigh your samples to make sure that you are doing a fair test. Whichever one breaks first, make more samples of it with more layers until it breaks second, and then weigh that - to see how much you had to add to it to overtak the stronger material. Note that the type of infill that you use will make a difference.
Preliminary results - I weighed the two samples on an Ohaus laboratory scale:
The trimmer-line sample was 6.10 g. The T645 was 5.47g. The T645 broke. This test needs to be repeated with the T645 weighing the same or more. I can increase the extrusion multiplier by 12%.
I completed the second test. This time I made sure that the weights were closely matched through control of the extrusion multiplier. 5.86 grams for the trimmer line and 5.93 grams for the T645. That is less than 1.2% difference. This time the T645 won. I set up tow straps with my Sequoia, and the samples did not break when I took my foot off the brake and let the truck creep forward. They just stopped the truck from moving! Then I gave more gas and the blue snapped. I bet these can support my weight many times over.
From these very limited sample points, it appears that the T645 is stronger, by at most about 9.7%.
I just had to find out what would win a tug-o-war, so I printed these on my M2 with E3D hot end and then pulled them apart. 6 top and bottom. 4 perimeter. 0.15mm layers. 99% infill.
Since there is just one sample of each material, it is not statistically-valid. Ranked from best to worst:
GizmoDork black Polycarbonate (290C) $50 per KG
Polymaker Polymax (205C) $77.89 per KG
ColorFabb PLA-PHA (205C) $56.00 per KG
eSun PETG (yellow) (250C) $33.99 per KG
Taulman Tritan (275C) $90.00 per KG
ColorFabb XT (250C) $65.33 per KG
Octave ABS (230C) $31.00 per KG
Not tested yet:
Taulman 645 (245C) $70.40 per KG
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Material Strength Test Sample by rsilvers is licensed under the Creative Commons - Attribution license.
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