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Questions tagged [print-strength]

Questions related to the mechanical strength of a print, e.g. material strength, or finished part strengths

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1 vote
0 answers
67 views

How to find the weakest point of a model?

I would like to use some kind of simulation software to test my model and find the weakest points for example when pressed or stretches from different angles or positions. Under different loads or ...
2 votes
0 answers
100 views

How much weaker do PETG parts become when exposed to UV light from the sun?

What is the effect of UV on PETG parts? Can I minimize that effect by placing some kind of UV light blocking film/coating? Also, is there a limit in how much weaker a part can become because of ...
0 votes
0 answers
47 views

Is there a filament that exhibits less deformation than PETG (when subjected to stress for a particular application)?

I've printed a "clamp" in PETG which locks a power switch down (the "On" position). After a few days, the print is not working anymore. So I was wondering if PLA (or any filament) ...
1 vote
2 answers
83 views

Resin mechanical properties during the print process, immediately after light hardens it

Resin specifications There are datasheets available for SLA resin mechanical properties. Like this Formlabs' General Purpose Resin datasheet. They present mechanical properties for two cases. First ...
2 votes
2 answers
202 views

How to harden / strengthen the teeth of a 3D print

I have a 3D object that I print with 0.6 mm nozzle and white PETG. At the moment I can't print the layers in another direction since I use 3D printed threads. The object is a de-seeder bit for the ...
0 votes
0 answers
18 views

Advice with material selection for compression applications

I am creating a punch and a base for an arbor press and because of the specific size need, I want to 3D print them. The most pressure that an area of the base and punch should endure is something ...
2 votes
1 answer
273 views

How much weaker does PETG become when it absorbs as much moisture as it can hold?

How much weaker does a PETG part become when it absorbs as much moisture as it can hold?
1 vote
3 answers
2k views

Can I 3D print a wall assembly and expect it to be load-bearing?

I need to build me a small support wall 250x80 cm mounted on two metal supports approximately 200 cm apart. I was looking into WPC (Wood Plastic Composite) boards and then it hit me that I may be able ...
4 votes
4 answers
5k views

Best material for compression?

I'm designing a mount for a cylindrical speaker to attach to my bicycle. It will mount on the bottle cages. I've printed a few iterations with various infill settings (using PLA) and the weak point is ...
4 votes
2 answers
2k views

Does the color of a filament effect its physical properties?

When choosing which filament to use for a particular print does the color of the filament have any impact on it's performance, or is it purely a cosmetic choice? For example, are there any side-by-...
1 vote
2 answers
221 views

Copper-infused PLA for spur gears

I am currently printing PLA infused with 80% copper powder. So far I mainly used it because it looks and feels really nice and post-processing is almost limitless, however recently I have thought that ...
1 vote
1 answer
2k views

Adaptive infill density in small region

I'm using Ultimaker Cura to slice my 3D models, and I often have a problem with object with dimensions over multiple orders of magnitudes. Basically, if I set an Infill of 20 %, the infill is ...
7 votes
5 answers
2k views

Improving durability of a printed propeller

I am currently working through various different iterations ofccreating a propeller for a model ICE (nitro engine). So far I have managed to disintegrate each of them eventually. I have been ...
1 vote
1 answer
365 views

PC-ABS poor layer adhesion

I recently started printing Polymaker's PC-ABS blend on my modified Ender 3 v2. The print quality is good but the layer adhesion is pretty bad. The layers aren't delaminating while printing but I can ...
3 votes
3 answers
3k views

PETG layer adhesion problems

I have recently started printing with Polymaker's PolyMax PETG on my Ender 3 v2. I have not been able to get the layer adhesion anywhere near as strong as it should be. I would guess it is around 20-...
1 vote
2 answers
2k views

3D Printed Lead Screw

I want to build a mini CNC machine and need some lead screws. I was wondering I can simply 3D print some. There are a few 3D models out there but I want to know if printing it in PLA+ has enough ...
1 vote
0 answers
33 views

Question about viewing molecular structure of 3D printed objects

I'm writing a research paper about the implications of additive manufacturing for space travel. As a part of this paper, I'm going to illustrate some of the drawbacks of 3D printed objects such as how ...
5 votes
2 answers
1k views

DIY tensile strength testing

I want to tackle an experiment with the following goal: Determine the correlations between printing parameters (temperatures, speeds, humidity, perimeters, infill, etc.) and tensile strength ...
2 votes
3 answers
6k views

Why does my PLA filament keep snapping?

Why does my 3 mm PLA filament always snap near the spool some time (usually a few hours) after a print has finished? I have had it snap mid print but this is quite rare. I have 3 rolls of 3&...
6 votes
3 answers
7k views

What is the best infill pattern for shearing strength?

For practicality sake, I need to print a design such that there will be weight hanging parellel to the layer lines. Is there an infill pattern that would be better than others at handling this? I ...
6 votes
1 answer
6k views

Which material "creeps" (plastic deformation) the least (or nothing at all) under pressure after being printed?

I would like to build a standing shelf where the supports which hold each successive plank are 3D printed (to obtain special shapes). However, I read that PLA flows under constant stress/pressure. ...
3 votes
2 answers
305 views

What slicer settings would produce the strongest part?

If a part is wanted to be made the strongest possible, what slicer settings should be used? 3-5 shells vs all shells, no infill? 100% infill vs some other % infill? Thin layer height vs thick ...
7 votes
4 answers
31k views

How do you assure that you print layers that bond correctly?

I'm fairly new to 3D printing but I'm getting the steam up and I chug out pieces without much hassle. One thing though is that I have the impression that sometimes, parts are easily broken, and I ...
3 votes
0 answers
1k views

Best infill for inter-layer adhesion

I'm fairly convinced that gyroid is the best infill for a lot of purposes, and use it regularly now, but both conceptually and anecdotally, it doesn't seem very good for reinforcing inter-layer ...
7 votes
1 answer
720 views

FDM layer bonding strength

I'm looking for some advice, rules of thumb, or models for how to design parts for layer bonding strength. As an example part, lets assume a circular beam in bending (tall cylinder). Depending on how ...
10 votes
2 answers
212 views

What is a good way to estimate the impact on material strength different printing methods will have?

I'm going to 3D print a part that needs to meet certain strength requirements, due to its usages. I know how strong a particular plastic (eg. comrpessive/tensile/shear strength) is when dealt with in ...
8 votes
3 answers
3k views

How to determine shell thickness for parts?

Let's say you're printing a container or some other object with no infill. What's a good rule of thumb for how thick to make the outside? I'm looking for something along the lines of millimeters thick ...
6 votes
3 answers
3k views

How to calculate the strength of a printed object?

If I'm working with standard PLA, and I want to print a box that I can stand on without any risk of it breaking, is there any good way to calculate the appropriate print settings? I know that ...
3 votes
2 answers
324 views

Snap-in clamp geometry

I apologize if this is in the wrong section, but it seems relevant. I am an absolute noob at 3D printing, but recently my need for a specific, small part intersected with access to a 3D printer at ...
3 votes
3 answers
533 views

Is it safe to print a rotor insert for a centrifuge using a makerbot?

Laboratory centrifuges have buckets that hold the sample tubes in inserts. The buckets are the black things on the rotor in the upper left corner holding the bottles. Examples of inserts are shown ...
6 votes
2 answers
276 views

What should I think about if I want to design something modular?

For a while now, I have been thinking about designing things such as small bedside tables, game/dvd/bluray racks for 3d printing. I've always thought that making them modular would be a good way to go ...
6 votes
1 answer
612 views

Typical plastic strength at 1500 RPM

I'm planning to print a certain sample holder which is going to be placed on a CD-Rom BLDC motor and spun at about 1000-1500 RPM. The holder would essentially be a 2-3 mm thick 100 mm square platform ...
12 votes
1 answer
9k views

Does the layer thickness have any effect of the strength of the 3D printed object?

Is a 100 micron layer thickness object stronger than 300 micron layer thickness 3D printed object? Are there any rules to follow? Filament type - PLA
33 votes
7 answers
8k views

Designing clips that won't break

As my first project, I'm trying to design a holder for glass vials, for a scientific application. The photo below shows the latest design iteration, and also shows the problem with it: As you can see,...