Hi Dave, I always wondered is there any possible way to do the load simulations on 3d printed parts through software programs as the manufacturing process is completely different compared to the traditional way of manufacturing.
As far as I know, there is not any commercially available simulation software that can do this. I was able to find a technical paper that outlined a numerical solution method for this, but it would take some work to be useful.
nice, are you going to wrap the 3d printed joints in carbon fiber next? I suggest polyolefin tape over carbon tow if you do, and a heat gun set lower than the melt point of the printed plastic.
I’ve been thinking about this too!! Glad I found your video have you thought about wrapping the lugs and other high stress points with carbon fiber and resin? With a big enough plastic bag and a vacuum pump you can pretty clean results
*Great **Latest.Bike** , good looking, good suspension and love the gearing. I've tested some bikes that were more then twice the price but not as good. Get lots of looks when riding.*
Thanks guy! I'm really looking forward to riding it. Every time I have to run to the store real quick, or want my afternoon ice coffee, I'm like, damn I wish I had that bike!
Define "normal" filament. There are also a large variety of carbon fiber reinforced filaments so the ductility will vary greatly. This particular material I'm using (carbon fiber polycarbonate) is not brittle at all.
This is sick! I'm thinking about doing something similar, but with molds of the printed parts, so I can cast em and make em strong enough for a MTB. Where do you get the carbon tubes, and how much where they?
Great work, David. It inspires me to work on a frame but I am concerned about a response comment. The weight of 3.75 pounds seems pretty decent but you said that a "conventionally welded Ti or Al frame would be less." I have a bike I love that is a recumbent called a Maxarya 2X. But it is too heavy, even though it is aluminum. If you looked at the frame, would say that changing to a similarly shaped carbon fiber lug and tube would not result in weight savings? I would love your opinion.
No weight savings with this construction technique. The lower strength 3D printed components requires more material (more mass) for equivalent strength.
Hi Dave, amazing work, super inspirational! Im in the process of designing my own e-bike and plan on taking a similar approach. Do you have any experience with Rhino 3D or is moving to Solid works a better idea for prototyping/printing parts for a bike?
I don't have any experience with Rhino. From what I understand, Rhino is superior for surface modeling but does not have the same level of detail working with multi bodies and assemblies like Solidworks does.
Good process. I tried this approach and was using Fusion 360 and got frustrated and didn't invest the time you did in the model to make it work. I went back to my scuplture approach with pink foam and carbon fiber sleeving. Cool to see you do it.
My modded Creality Ender-6. See ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-pIm2zar_TQ4.html and ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6PIEF9uWKSA.html
I enjoy following your videos, Dave. Interesting application for the 3D printed parts. I am eager to see the results. It looks like you take into account the Z-layering. This is a crazy cool project!
Thanks for checking it out. There's a term not many are likely familiar with, "design for manufacturability" That of course means taking into account the manufacturing method when designing parts. Since I know these parts will be 3D printed, I need to take into account all the capabilities and limitations of my printer. Hence that large, flat bottom surfaces, z layer orientation etc. Were these parts to be CNC machined or molded carbon fiber, they would look quite different.
@@designbydave - nice! I really look forward to seeing how this works out. I personally thought about putting in aluminum sleeves inside the 3D printed brackets then annealing them. This is a really neat bike project. It kind of reminds me Land Shark bicycles. Very unique and I think you are onto something!
Where's the part where you mold and print in forged carbon also the joints? Cause don't tell me your goal was actually to make a carbon tubes bike with pvc joints.
@@designbydave I've seen it! Cool I thought you were going to cast the chopped tow fibre to mold those joints. What if also... If the tubes had to fit the joints outside? I mean bonding the pipe, the inner part, with the exterior of the joints. They did like that in the 80s I heard (alluminium joints with carbon tubes). You might have to design a step on the joint and measure carefully the... oh lord. The beefiness of the pipe how's calld it, to make the depth of the step where you bond 'em. I see the pro that you'll have straight cuts on the pipes, and you can size any bike to the rider cutting pitagoric correspondant measures for the 3 main tubings. Send'em a very basic jig in the box and voilà, it's a DIY cut-to-size carbon bike! :)
