SIMULATION in FUSION 360: IMPROVE the STRENGTH of your 3D prints!
Вставка
- Опубліковано 15 вер 2018
- Learn how to use Finite Element Simulation in Fusion 360 to optimize the strength of your parts!
💚 Support me 💚
Patreon: / cnckitchen
Join as a UA-cam member!
Original CNC Kitchen Threaded Inserts: geni.us/CNCKInsertsChoice
Merch: teespring.com/stores/cnckitchen
Buy an Original Prusa i3 printer: geni.us/CNCKPrusa
PayPal: www.paypal.me/CNCKitchen
Shop at Matterhackers(US): www.matterhackers.com/?aff=7479
Shop at 3DJake(EU): geni.us/zHvnB
🎙Check out my PODCAST with Tom Sanladerer
/ @themeltzone
⚙ My gear (Affiliate Links):
🎥 CAMERAS & LENSES
Panasonic GH5 - Professional 4k60 camera: geni.us/LMN0CmS
Panasonic GX80/GX85 - Great value system camera: geni.us/M2Sm
10-25mm f1.4 - Awesome Lense: geni.us/ZTBH
30mm f2.8 macro - Great Macro Lense: geni.us/vEwqD
12-35mm f2.6 - Great allround lense: geni.us/S9GOsr
14-140mm f3.5-5.6 - My go-to travel lense: geni.us/fSAyKo
25mm f1.4 - Nice prime for photoraphy: geni.us/mqWM
🎙AUDIO
Rode Video Mic Pro - Shotgun mic: geni.us/6JFRdJ
Rode Film Maker Kit - Wireless mic: geni.us/XMD2N
Rode NT-USB - Studio Mic: geni.us/YVONvy
🔴 LIVE STREAMING
Elgatoo Stream Deck: geni.us/ppIiAL
Elgatoo HDMI USB Capture Card: geni.us/imhD
Logitech C920 - Overhead camera: geni.us/ViVgB
Thanks to Joel, the 3D Printing Nerd for his support: / @3dprintingnerd
Download the optimized Filament Rack Bracket: www.thingiverse.com/thing:310...
🏆 Do you want to help me cover my running costs? Send me a dollar or two over PayPal, it helps me a lot!
www.paypal.me/CNCKitchen
🌼 Even watching the ads before my videos helps me a lot!
Follow me on Twitter: / cnc_kitchen - Наука та технологія
Dear UA-cam, please base my recommendations on this video. This is exactly what I want to see more of.
Dear Dan Ko, your request have been registered and saved in the recor......wops, dropped it. We will instead recommend you "This week with John Oliver" and "Mr Tfue" videos with a direct wormhole to both "Keeping up with the Kardashians" and "Instant regret" playlist, Kind regards - Yotbe, probably.
yeah and you will see this video recommended over and over instead of newer video's from same channel:/ i've watched this channel for a long time yet this video only now popped up in the side list after watching some other 3d print related stuff..also on my youtube recommandation page are only video's i've watched or a good 90% of them..epic fail..
You could always subscribe and turn on notifications to this channel and
💥!! DESTROY!!💥 the like button on all of his videos.
Fingerbang that like button, it helps sometimes.
@@mRcOOL5YO the benefit is 3 years later, you forget you saw the video and get to watch it again🤣
Very informative! Thank you very much for this, Stefan!
better than your shit channel especially you are full time on it !
Hey drunky, how's your nose?
LOL it's not that he's drunk, it's some actual medical condition as he's mentioned in some Q&A.
Nobock
really!!! I bet you are fun at parties, oh wait you don't get invited.
Don't attack this guy in person, just his content, thank you !
Love to see proper engineering applied to design! As you have pointed out, the MAIN introduction of error in the approximation is the assumption about the boundary conditions and of course material properties, PLA under load behaves highly non-linear and, as pointed out, the FDM technology causes the resulting material to behave anisotropically.
This means that these tools cannot and should not be used for analyzing absolute stress distribution or decision making due to absolute stresses. That said, comparative studies can be carried out.
Your discussions about proper boundary conditions are superb! Keep up the good work! The makers world needs more high quality videos like this.
Border conditions can be assessed by destructive testing, while taking in account and adding to the database the conditions the 3d printed part was made. Although that testing is not made under any industry standard, it is valuable data though, because it considers the worst case, real life scenario.
CNC Kitchen continues to grow and blossom! Excellent video, you are a real hero of the community!
THIS IS THE VIDEO THAT I WAS HOPING FOR!!!
I had to learn about stress analysis in Fusion 360 for my 3d printing designs.
It will confirm my intuition before starting a print!
I will be able to compare design A vs B vs C vs D and only print the two bests ones!!!!
Thank you so much Stephan
Alex from Québec, Canada
One of the best professional 3d printing channel on UA-cam. Great!
Stefan - that was fantastic! I learned quite a bit watching this video. Thanks for taking the time to share!
I'd love to see Joel do a video himself where he makes simulations himself. It's always useful to have another set of eyes from a different background for design problems like this. 3d printing has been an interesting area where you don't need engineering to make things work, but learning tools from the engineering tool box can help you so much.
Ah, I love these kinds of videos, I always learn something new! Keep up the great work Stefan!
As a previous engineer pretty familiar with FEM (ANSYS) you did an EXCELLENT job with this video. Not sure about Fusion but you could have simulated the wall with a fixed constraint to not allow movement in the -X direction on the back of the support surface. Also, you might want to include design constraints such as being able to easily mount the bracket. For instance, your design makes it very difficult to securely attach that center and bottom hole with a Phillip's screw as the bracket would impede the screwdriver. Love that fact you correlated the analysis results with actual testing.
I'm glad you did this video. It's very helpful to learn how to make your parts stronger. When Joel first did his brackets, it was pretty clear that they weren't the best design. Simply looking at rafters for roof construction demonstrates an optimal design of a truss. Regardless, I did appreciate the basic idea of making shelf brackets for my filament rolls. They work great.
Nice to see an engineer's perspective. I had no idea the simulation in fusion 360 was on this level. I'll definitely be using this going forward!
Joel the 3d Printing Nerd was right to send me here. You have much to teach me
Thats really cool! I did not know about this Feature.
I have to play with this a little bit later!
What a great video!! I'm so glad you included the lesson about the FEA constraints at the end! This has the greatest influence on the analysis results.
I think normally, fixed supports for bolt holes is not a good assumption because they should allow free rotation with linear support at bolt head(Fixed support makes part artificially stiffer) But looks like your failure correlated well!
When you added the friction less surface to the back of the bracket I immediately shook my head. Then you added a note all was good.
Im not too familiar with stress analysis, but could you explain what is the issue with the frictionless surface assumption?
@@TheGoodoftheLand The problem with commenters like yourself, is that you don't take time to listen to information in the actual video, and rather bash a comment you don't agree with. Or, in this case, defend a stupid question. Because the reason why "using a friction less surface is bad" , is given directly after he applied it in the video @9:53. Just because you don't know about a topic, doesn't mean no one does.
@@rikdol This is an informative video for the general public. People like myself watch an learn from it. The question I asked may sound stupid from the point of view of someone who is more familiar with the topic, but for me, it is totally reasonable. I watched the entire video and the reference @9:53 still didn't clear my confusion about this point so I was proactive and asked for clarification.
If you know better, please go ahead and explain this point.
@haytham hakla a frictionless surface will be unable to move away from the wall. Earlier in the video ( @1:50, look closely to the bottom part) it shows that the part is bending. When a surface is set to be frictionless, it will be unable to move during a stresstest. So a test like this for stress and bending or warping of material under high load, won't be realistic. Another example of the part moving away from the wall is @20:00, circled in red..
@@rikdol Thanks for clarifying
Great video! You said the KEY POINT in Engineering/Design/Analytics: "If your assumptions are off, your results will be garbage".
There's so much more to FEM than people think. I dare to say it's one of the most underestimated parts of engineering, because people assume that "pretty colorful images" guarantee accurate and realistic results. Even if you choose the right load case and boundary conditions you might still use the wrong element type or solver and get numerical artifacts without even knowing ( if you don't know what to look for).
Thanks for this really informative video. The simulation tool is my next go-to. Thanks again.
Many of us pointed Joel to your video on this subject when he was making those brackets :-) On his second video on it he mentioned you and that video. I'm so happy you are doing a follow up to it. Thank you.
Good video, I love your videos using stress analysis and optimization from Fusion 360.
this video drove me to support you on patreon. keep it up mate
Thanks, your support is highly appreciated!
Excellent video Stefan. Loving Fusion360, can't believe its free!
Another terrific video. Thank you.
This is exactly the kind of video I was looking for, thanks! I am new to mechanical design, but had heard of FEA in the past, and wondered how difficult it would be to use for designing my functional parts.
Now that was a useful lunchtime at work.
I now need to find a use for my new knolege
I use this all the time since I am a mechanical engineer its a very nice program to test your design
Hi Stefan. Danke für deine Videos. Du machst das sehr sympathisch, vermutlich weil du mich an meine nerdness erinnerst.
Extremely informative and interesting video. Cheers!
Ich weis nicht was besser ist - der Inhalt, oder die Machart und die Umsetzung der Videos. Ich denke, weil hier alles in jeder Hinsicht perfekt ist :) i love it, you get a Hug & a Kiss :D
Just watched one on topology optimisation and all the way through was thinking 'Sort your boundary conditions out!"... Nice to see him come back to that at the end of this video.
Wow! That was great! Very informative!
OMG! Noch einmal! The German engineering excellence is not a myth! Rigorous demo. Love it. Thanks a lot Stefan! I used to work in Lahr, Germany, 50 km away from Strasbourg where I live. I did appreciate the seriousness of German engineers (IT sectors) but never understood their humor - still wondering whether it exists ;) - my German language knowledge being so wanting...
amazing man that was very clear and I have got a good picture on how to validate with real testing Thanks
Very interesting topic and well done video!
That is a great result!! That is way enough for a bookshelf or what so ever.
Oooh, you got some o' that stronger, yellow filament! Nice!
If it's possible in Fusion 360, make sure your fillets are curvature continuous, otherwise there might be imperceptible discontinuities that can be treated like cracks.
Another important thing to consider is controlling the failures. If a failure at spot X would be dangerous, but a failure at spot Y would be safe, make sure there's a higher probability of failure at Y.
Thanks so much! The simulation stuff is really scary to jump right in, but you make it look easy.
Love your work!!! Thank you 😊
10 sekunden das video geguckt > nachgeschaut wo der channel ist > deutschland > wusste ichs doch :D
Nice video mate! Thank you!
Fascinating video! I have already identified ways I can incorporate this in my workflow. The real danger is getting to the point where I’m over-engineering my shop furniture!
Awesome!! love this. I need to learn how to design better parts. this is great!!
awesome video, thanks!
Thank you for sharing this tutorial! I can now get even further over my head resulting in even more fun :) I hope you get feeling better soon. Worst case, punt: extra spicy doner kebap, chips with extra paprika, and a whole bottle of rot trocken... unless you have chicken soup over there.
Great stuff! Must learn simulation in Fusion360.
great video, thank you so much!
+CNC Kitchen
I would like to see you try adding a thin section in the middle (like an I beam) with strengthened "cutouts" for the screws instead of thickening the material. If you print from the base and up this should avoid having to add support material.
Nice work Stefan 👍🤘
Awesome. really interresting. Thanks a lot.
Excellent topic!
I think it would be interesting to see a generative design and how it would compare during this analysis. Thanks a lot for the video Stefan! Good Job!
I don’t know why, but I love this so much; the concept of being able to optimise through software
Welcome to the world of CAE (Computer Aided Engineering)
Nice video!
I love these.
Did you ever test the revised version at the end of this video?
Awesome video.
Really motivative to try the features in F360 on my own now, thanks! ;-)
I love playing with the stress analysis features in Fusion 360, and this was a very interesting video. But I am disappointed that the end result was "make it thicker", I was hoping you'd do some kind of automatic structural optimisation. You don't need finite state analysis to tell you that a thicker part can take higher load then the original.
Well the analysis tell you where to make it thicker and where is not needed.
Very useful video! I'm always curious about exceeding material strength in compression for malleable materials. Our PhD analyst is always asking me to beef up areas exceeding yield in compression, but it has been awhile since I've seen material compressed to failure. Thank you!
Excellent video!
Thanks a lot.
I have seen topology optimisation in comsol multi physics, not aware about fusion 360.
wow ive never seen a video of yours before at least 1,000 vies!!
great video!!
Just hit the bell icon and you will be reminded of new videos at the point of release 😉
Great video thank you.
Great video but I have a suggestion.
This is basically "euler bernoulli beam theory"
By increasing the area of inertia the structural strength increases.
You can test this by flexing a ruler. The side with the greater inertia is harder to flex.
My suggest is that the middle support in the triangle should be flipped 90 degrees to increase its inertia.
But anyways this was a great solution and a great video
Victor Forslund hard to print if you want it to remain in the middle
Great work!
All the simulated shapes reminds me of engine conrods.🤓
Is there a follow up video??
In my limited knowledge, I have learnt that different printing parameters change the properties of the final part. Does the simulation take all of that into account?
Thank you!!
very handy , thanks!
Fantastic! I would love to see the stress numbers of a standard (.04) printed part.
Great rundown on a pretty hard topic :D FEM was definitely not the easiest thing when studying 😅
I love your videos, we all learn something new from them. Correct me if i am wrong but your test scenario here is more suited for hanger and not shelf bracket. Shelf bracket should have load concentrated on the middle of horizontal part (if you simplify it with one force) or distributed evenly over entire length of horizontal part of the bracket. You would get other results then.
In any case awesome video and a lot learned about fusion 360
Newbie question : What settings do you use to slice this in Cura 3.6.0. I have tried to slice it but is shows a top and bottom layer covering the whole bracket...Many thanks DaveH
Cool video. This is the difference between brute force engineering vs mathematical. They both work. One is typically quicker to market, and the other just works.
Adding a very minor relief cut on the back surface of the bracket near the bottom screw would allow you to create a small constraint surface just at the bottom corner. This would prevent unrealistic results due to constraining the entire surface.
True!
@@CNCKitchen love your channel by the way, especially your methodical but garage-doable testing regiments! Also your video on heat resistance testing of various materials led me to be able to powder coat PLA! More on that another time
Hello Stefan! Nicely explained!
Maybe you could add a fixed contraint in a small area just at the back of the 3 bolts also without the frictionless support.
that's amazing
Loving the content and the engineering explanations.
What's your favorite printer?
Will you ever use a DLP printer?
im nerding out so hard right now
Super Video 😁👍🏼 Dein letztes Video mit der Typografie-Analyse hat mir echt geholfen für mein Druck.
Topologie 😊
Hehe ja Autokorrektur hat zugeschlagen 😅
Very good video Stefan. Can you do show us how to do a similar analysis using FreeCAD?. Keep up the good work!
Congratulations for your work! Have you considered increase the area moment of inertia of the lower member instead of just increase its thickness. I mean, you could try designing a "T" cross section, for example. That would reduce the normal stress at the lower member while keeping a lower mass. Again, nice work!
CNCKitchen; where did you get the fusion 360 drawing of the bracket, so I can follow along. I bought the stl file but can't do simulations on it. Can anyone help?
nice. more on this subject please!
have you done fea to determine effects of %,s of infill
Free question, it is possible to simulate the gcode generated by 3d printing to check if the grid type is the most acceptable. Thank you greetings from Peru
This is really awesome. What would be the effect of adding, say 2mm thick orthogonal strips which protrude from the cross member girders. This would make them more of a cross shape in cross section, and I think (in my special custom buckling simulation, in my brain) that configuration would spread the load stress more evenly and perhaps improve buckling load resistance. Great video thanks!
very cool video i would suggest a test where you put a woodboard on top of two breakets anthen pull down inthe centerpoint of the board
Great video.
Kind of hard to use the middle screw hole in the last design. Not much room to fit either the screw or screwdriver without hitting the stabilising part.
How do you locally solve the buckling analysis like in your video? Because mine wont do it and Autodesk help says,"Note: Local solving is supported for Static Stress, Modal Frequencies, Thermal, and Thermal Stress analyses. All other simulation types must be solved in the cloud"
He says that in the video as well.
Hi! Is there a program for checking strenght on a 3 model? Where we are now with 3d printer program and Cad program i think we should had develope a program for this. Maybe there is already one that come with more expensive cad program. But there should be one free that are for plastic material by now
I am just wondering about the material and process data due to the 3D printing process. It seems that the FEM simulations are performed with full material, but printer settings such as filling, wall thickness ,or layer height are not considered. In this case, why do the simulation results roughly match the test results? Thank you very much for your help!
did you consider using a triangular or hexagonal filling? it might add strength
19:00 Bless you
excellent ....i used to do some fea about 20 years ago...did not know fea available on f360..is cloud buckkling available free for 'hobby' can you constrain to simulate washers?
The analysis is for 100% infill? How i can configure the analysis for 15% infill? Thanks for the awesome video!
Watch those bolt spacings to load points fasteners as close to load points for optimising load capture without inducing torques.
so now to do anisotropic simulation then? does fusion support it at all or will i have to use a dedicated FEA-program for this? I mean, the ones included in Fuison, Inventor or CATIA are way simpler to use than ansys for example, so it would be nice if i can do it in the CAD program...
It is amazing how difficult these simulations are for computers, yet how intuitive they feel to humans after we see a few of them.
Wow, two UA-cam's united work together👍
Nice work, thanks for sharing👍😀
I wonder if applying a shell to the body in the model work-space would help make it slightly more accurate for 3D print simulations.
Also thought about that. Might give it a try next time.
Some FEA software like ABAQUS can model shell elements e.g. only modelling elements on the surface of the part, and then you define the thickness with a separate parameter. That and a way to approximate part infill would be really nice in Fusion.
Having specific shell type mesh and simulations is partly for ease of computation, and partly for accuracy. A shell mesh generally just covers the outside surface of the part, so the mesh is less complex to model the same part, or you can have a finer mesh for the same computational cost. It generalises it a bit using just a surface mesh e.g. it may assume the variation in stress between the inside and outside of the shell is negligible, which it is if the shell thickness is low compared to the size of the overall model.
In FEA, it's important to make the mesh variation smooth e.g. for a given element (smallest 3D shapes in the mesh formed between mesh nodes) you don't want the difference in length of the edges to be too much, something like 1:3 (ideally it should be as close to 1 as possible) ratio between any two edges on an element, otherwise the results become quite innacurate. If you modelled the entire 3-dimensional shell, you may have small edges between the inside and outside of the model, but much longer ones on the surfaces of the objects. So in order to get an accurate simulation, all the edges would have to be similar in length to the ones passing through the shell, and that could make the mesh way more complex again, for not much gain in simulation accuracy.
Kind of like in the video where Stefan mentions you should have no less than two elements over the thickness of the part in order to accurately model it with this type of mesh. I'm not sure if one element thickness is good enough for a shell assumption (I'm not an expert in FEA), but even so a very fine mesh would be required. This is basically what a shell type mesh property is for, greatly reducing the computational effort (and user effort) to make an accurate model of this type.
In terms of the infill, I was only really thinking of having an internal mesh with different material properties to the surface, modelling the infill exactly would be very difficult unless it could be done in a slicer or with the G-code or something. I'm just thinking the internal mesh could have material properties which better models infill e.g. with 10% infill the Youngs modulus is only 10% for the infill (I'm not exactly sure that example is correct as again I'm not an expert in FEA but you get the idea). I suppose overall the mesh may be just as complex as these ones but I think it would be far more representative.
Rather than modelling a solid part, modelling the surface to have diferent properties than the infill is essentially what I'm advocating.
I'm assuming the elements in Fusion are solid continuum elements, since there's no way to change the element type from what I can see. The modelling feature in Fusion evidently is simplified for basic simulations and ease of use. Shell elements are solved differently to solid continuum elements and are better suited to that type of structure. Since practically all 3D prints are shell type structures, something built into Fusion which could model that type of structure accurately would be nice. I'm not an expert but have used FEA to an in depth level for a specific application. Perhaps the standard elements are suitable for that type of structure, I don't know. I do know that in ABAQUS which I have used before, there are standard continuum elements and shell continuum elements, so evidently there is a need for them. Reading into it a bit more, the shell continuum elements have a plane stress assumption, so only the stresses along the surface are measured and stresses normal to the surface are assumed to be neglible. The elements can distinguish the stress variation through the thickness of the part however, with more shell element layers giving a more accurate picture, although that's probably not very important since the shells are generally quite thin on 3D prints. I'm not sure if it would be suitable to all types of model actually.
For the infill, I don't see how it would see it as an incompressible solid if the infill was represented as a mesh. If you gave the infill mesh different bulk material properties which reflected it's behaviour e.g. such as Stefans video on infill strength. With low infill settings, the lattice structure is large compared to the overall object and could be significant, but low infill doesn't affect part strength much as we all know. Also at higher infill settings, the lattice is more dense and begins to act as a continuum, so a solid mesh should be a fairly accurate model.
In retrospect, I think I was proposing something (using a shell type mesh to possibly model a 3d printed part more accurately) which seemed to make sense at first but actually might not be correct since I'm not an expert in FEA like I've mentioned, but I have used FEA to understand how it works. Ultimately the proposal is that Autodesk adds some feature, to either fusion or another piece of software, which more accurately and efficiently models 3D printed objects. If they could make a tool which generates a mesh for the shell of the object, then generates a mesh on the inside of the part for the infill with one click and simple data e.g. shell thickness, Youngs Modulus etc. A step further would be to model the anisotropic structure of a 3D printed part i.e a 3D printed part has different strength as well as other properties depending on the direction it is printed. If they gave you a little arrow and allowed you to point it in the direction the part will be printed, then it could apply the properties to the model based on that, perhaps even structure the mesh to be in line with the layer lines of the print.
You'll never be able to model a 3D printed part perfectly, but each of the things above would bring it one step closer to being accurate. You could defnitely model a 3D printed part using existing FEA software, but it would be time consuming and laborious. If someone could make something that could automate the above, that would be really useful for the 3D printing community. I guess there hasn't really been any incentive for that type of modelling until recently, since 3D printing has mostly been used for prototypes and not fully functioning parts. Maybe this software exists already although I hope it's not behind a high paywall.
Could you just add a reaction force to the back of the bracket?
Totally want to see a simulation with the wall, and screws, and the whole 9 yards. Seems like you know how; let's see it!