Filament Energy Testing | MatterHackers

One of the frequent questions we get from clients is, “What’s the strongest 3D printing filament?”  That’s a fantastic query as a result of for 3D printing to be helpful, we’d like to have the ability to print components which can be sturdy sufficient for purposeful use.

“Energy”, nonetheless, is a bit obscure as it may well refer to a couple totally different mechanical properties – tensile energy, yield energy, fatigue energy, compressive energy, and influence energy – so it’s a troublesome query to reply with out extra data.

Don’t fear, you don’t must know what any of these phrases imply for this text. We’re not a testing lab and we will’t carry out any scientific assessments of these mechanical properties, and we absolutely did not discover a Younger’s Modulus.  What we will do is carry out a comparative take a look at – placing 3D printed components by means of the identical take a look at, and seeing how filaments evaluate to one another.

Comparative Testing

We began with a component everyone seems to be conversant in – a 3D printed carabiner. We scaled it to the approximate measurement of the aluminum carabiners you’ll find at native {hardware} shops which can be rated for 150lbs.

To remove as many variables as attainable, we printed all of them on the identical 3D printer (Rostock Max by SeeMeCNC) with the identical settings (except those printed on the MarkForged, however we’ll get into that later).

A 0.4mm nozzle was used, and the carabiners have been printed at 0.25mm layer peak with 5 perimeters, 5 stable high & backside layers, and 50% triangle sample infill.

Protocol

We rigged up a power gauge to a block and sort out pulley system with an 8:1 ratio. Because of this for each 1 pound we utilized to at least one aspect of the system, we utilized 8 kilos to the opposite aspect.

Once more, this was a comparative take a look at, not a scientific one, so issues like friction within the block and sort out setup weren’t accounted for.

Every carabiner was hooked up to the pulley system and we used a ratcheting cable pull to use stress till the carabiner failed. The power gauge recorded the height power reached.

Listed here are our summarized information:

Considerably surprisingly, Taulman 645 failed on the lowest weight of any filament we examined, but it surely was the one filament that didn’t break. As a result of it’s not very inflexible, it simply bent and deformed till it got here off the take a look at rig.  This toughness is clearly a really helpful attribute, but it surely’s not a super materials for one thing like this carabiner.

The opposite supplies just about failed within the order we anticipated. PLA was the primary to interrupt, and when it broke, it shattered. PETG additionally failed violently, however was fairly a bit stronger than PLA. That is why it’s a wonderful basic goal filament – it’s stronger than PLA and far simpler to print than ABS.

We suspected that NylonX would carry out effectively on this form of take a look at, however we didn’t count on it to carry out in addition to it did. Put merely, it’s simply superior. It’s a lot simpler to print than common nylon as a result of the carbon fiber lowers the shrink price considerably. The CF additionally stiffens it considerably, so it doesn’t have the deflection of normal nylon. It was over 100% stronger than PLA in our take a look at, and , on common, 60% stronger than ABS! 

As you may see, Polycarbonate carried out very effectively, and it had the tightest unfold from peak to low load till failure. Sadly, it was additionally probably the most troublesome materials to print with of all of the supplies we examined. It requires thorough drying earlier than printing, and it’s very liable to warp and curl up and about.

The carabiners printed on the Mark Solid have been a bit totally different than the others. The MarkForged prints in nylon and has the flexibility to bolster components with steady fibers. For this take a look at, we printed 2 with fiberglass reinforcement, and a pair of with carbon fiber reinforcement. MarkForged makes use of their very own proprietary slicing software program known as Eiger.io, so the settings weren’t equivalent to the opposite printed components, however we received them as shut as we may. The settings used have been 4 stable high/backside layers of nylon, 2 outer partitions of nylon, 5 concentric rings of fiber reinforcement, 50% triangle sample infill, and 0.125mm layers.

For causes that aren’t but clear, they didn’t carry out in addition to we had anticipated – with each the Fiberglass and CF components performing worse than NylonX and Polycarbonate. We’ve gotten some extremely sturdy components off the MarkForged previously, so we’ll be exploring this a bit extra to see why the carabiners didn’t carry out as anticipated.

Outcomes

After watching the video of the components breaking, and taking a look at our information, we realized a couple of issues.

Whereas we have been making use of stress to the 3D printed carabiners, we weren’t simply measuring tensile energy. We discovered that the integrity of the latch and the flexibility of it to remain closed so long as attainable was an enormous issue within the max load earlier than failure. The extra versatile the filament is, the extra simply the latch unseats/opens, and this results in failure extra rapidly. After observing this, we experimented through the use of latches printed in PLA filament and NylonX for a couple of of the assessments. For instance, after we examined the Taulman 645, we carried out 2 assessments with latches printed in 645, 2 assessments with PLA latches, and a pair of with NylonX. The height worth for Taulman 645 was reached through the use of the NylonX latch – which is smart given the outcomes we noticed.

This isn’t shocking, however we level it out in order that we don’t get folks asking us if this take a look at means PLA filament is stronger than Nylon. With this explicit half and take a look at, stiffness was essential. Most nylon filaments, like Taulman 645, aren’t notably stiff, in order that they didn’t fare effectively on this take a look at, however that doesn’t imply they don’t seem to be sturdy, sturdy supplies. The PLA components shattered aside after they failed. The Taulman 645 simply deformed sufficient to not help any extra weight. They roughly returned again to their authentic form after eradicating them from the take a look at rig.

As an apart, we did take a look at 2 of the aluminum carabiners from the ironmongery store. They have been stamped as being rated as much as 150lbs. Each of them maxed out our power gauge at 480lbs. Then, we taped the latches open, and so they failed at 168 lbs, and 183 lbs. We aren’t certain, however it might appear that the load ranking relies on the load it may well maintain with out the latch engaged.

Although we used the identical 3D printer and the identical settings for all of the components, there was fairly a little bit of variance in load earlier than failure. Whereas we didn’t carry out sufficient assessments with every 3D filament to get a correct statistical information set, it seems that there could also be a good quantity of inconsistency inherent to the FFF course of.

Inconsistencies weren’t important sufficient to vary the failure level location. Each single carabiner failed in the identical spot, which is precisely the place we might count on the carabiner to fail. We did count on to have at the least 1 or 2 fail because of poor layer adhesion or different 3D printing-related subject, however that wasn’t the case.

Conclusions

We now have been completely impressed with NylonX. We have been printing with it for about 3 months now, and it is simply an superior 3D printing materials. Sturdy, sturdy, simple to print, and it has a fantastic floor end.

And but, probably the most shocking results of our take a look at was how sturdy NylonX turned out to be. It even outperformed the continual fiber bolstered Mark Solid components – which we have been undoubtedly not anticipating. In actual fact, the MarkForged components, whereas clearly very sturdy, didn’t carry out in addition to we had anticipated. Solely Polycarbonate had a better load capability than Nylon X in our take a look at. That is smart as a result of despite the fact that Nylon and Polycarbonate filament have comparable tensile strengths, PC is considerably extra inflexible, so there was much less deflection and the latch was capable of keep engaged longer.