Flexure Joints for Large Range of Motion

No video

Flexure Joints for Large Range of Motion

Рет қаралды 93,228

Precision Engineering, University of Twente

Күн бұрын

Research by the PE lab at the University of Twente:
www.utwente.nl...
Below are some references:
M. Naves, D.M. Brouwer, R.G.K.M. Aarts, Building block based spatial topology synthesis method for large stroke flexure hinges, ASME robotics and mechanisms, accepted manuscript, doi: 10.1115/1.4036223.
Naves M, Aarts RGKM, Brouwer DM (2017) “Large stroke three degree-of-freedom spherical flexure joint”, Euspen’s 17th international conference and exhibition, Hannover, Germany.
M. Nijenhuis, J.P Meijaard, J.L. Herder, S. Awtar, D.M. Brouwer, An analytical formulation for the lateral support stiffness of a spatial flexure strip, ASME mechanical design, in-press.
D.H. Wiersma, S.E. Boer, R.G.K.M. Aarts, D.M. Brouwer, Design and Performance Optimization of Large Stroke Spatial Flexures, Journal of Computational and Nonlinear Dynamics (ISSN 1555-1415), 9(1), 011016, pp. 10 (2014). DOI: 10.1115/1.4025669
D.M. Brouwer, K.G.P. Folkersma, S.E. Boer, and R.G.K.M. Aarts, Exact Constraint Design of a Two-Degree of Freedom Flexure-Based Mechanism, Journal of Mechanisms and Robotics (ISSN 1942-4302) 5(4), 041011, pp. 10 (2013). DOI: 10.1115/1.4025175

Пікірлер: 47

@tkzsfen 3 жыл бұрын

As an engineer, this is very inspiring. I hope I can imitate some of these ideas in my otherwise usual designs. Can't wait what the future holds!

@astasna 3 жыл бұрын

Optimized computations, good example!

@WallyMahar 2 жыл бұрын

I can't wait to see what the future holds when you guys decide to finally share the software

@jdstar6352 2 жыл бұрын

I was doing some thinking about flexure joints when I happened across a wall hanging device for large flat screen TVs. It is designed to swing out from the wall, and tilt, while remaining stiff in the "Z" axis. They sell millions of them. At first glance it looked like a perfect application for a flexure system. But polymer materials have low yield strengths. The ceaseless pull of gravity on the swing arm would rapidly deform flexible plastics. Although the joint itself would be theoretically "stiff" in Z, the entire apparatus would quickly sag down the wall unless the flexures were made from something like spring steel, which would defeat the cost savings from using monolithic polymer construction.

@kwinvdv 2 жыл бұрын

Polymers usually also experience creep. So that would also disqualify it as good materials for flexures.

@richmeister4eva Жыл бұрын

How do polymers handle static loads over a long duration, for example years?

@molomono9481 8 ай бұрын

Polymers are commonly used in the initial phase of designing and printing flexures. The actual joints manufactured in the end are using steel or aluminium 7075. 3D printing metal is also an option but does comprimise some of the material benefits. But just for the record all the polymer use is because of rapid prototyping. There is alot of potential geometries to explore.

@jjjcccbbb111222333 3 жыл бұрын

optimally we will optimize this optimization.

@nicolasduguay4 Жыл бұрын

I was waiting him to drop the retro-encabulator in his presentation.

@TwoDaysFromRetirement 2 ай бұрын

Halfway through the video the language gets very plate processing and residue plate funneling

@StijnKoppen 3 жыл бұрын

Impressive!

@kentvandervelden 7 жыл бұрын

Very cool. Results from design optimization are always fascinating, initially helping to point out an incomplete understanding of the design space, before suggesting unique designs.

@leolaroca 3 жыл бұрын

Great video, extremely well made!

@sennabullet 3 жыл бұрын

An incredible video. Thank you for making and sharing!

@michael-rommel 3 жыл бұрын

Thank you for the video. I was recently looking into flextures for some small 3D printed parts for hobby purposes. It seems, that almost all information about 1) explained examples and 2) pro/con of solving a particular scenario are hidden behind paywalls charging hundreds of € for research papers. And you don't even know, what's in those papers and if you can apply some of the information to your own scenarios. If you have some pointers, where accessible information about simple flextures or compliant mechanisms can be found, it would be very helpful. Thanks anyhow for sharing your info!

@ashleyavenuemusic 3 жыл бұрын

holy shit how do you only have 141 subs!!!

@fernandopb08 3 жыл бұрын

Amazing!

@Maxisokol 3 жыл бұрын

Bravo, very cool research indeed! :)

@nilsmelchert776 Жыл бұрын

May I ask, what software you use for animation and video production?

@midoriyaa.2749 3 жыл бұрын

Is Spacar avaible for download? I would love to test it. It's amazing.

@eduardlopatin1801 Жыл бұрын

where can I find more info about 5:05?

@blakewyatt3931 3 жыл бұрын

Take a shot every time you hear "optimum" or "topology"

@bensweet7025 4 жыл бұрын

I'm currently working on a project involving compliant mechanisms myself, would anyone be able to say what program is used at 3:00 for the shape optimisation stage?

@swinny176 4 жыл бұрын

Im on a similar boat and also interested. Did you ever find anything on this?

@njoywithabhi7 4 жыл бұрын

Hi it's a university developed program called Spacar

@racvv 3 жыл бұрын

did you find something?

@TheFailureMechanism 3 жыл бұрын

The simulation software package is called SPACAR: www.spacar.nl/ It is an academic software package developed at the University of Twente. The optimization routine is custom MATLAB code. Here is an article with more information: research.utwente.nl/files/30085211/Naves_Mikroniek_2017_3.pdf

@vitof.4626 3 жыл бұрын

4:45 - how they make this Support Trees? I would like to learn more about that

@lub8114 3 жыл бұрын

Those are dissolvable support structures made of PVA (polyvinyl alcohol - water-soluble filament). Such technology is possible with dual-extrusion FDM printers.