How do I start drawing/design a Pringles shape?

[Anonymous]

Hi guys, I really need some ideas to start drawing a pringles chip shape. The issue is, what I am trying to design will be one end(curve) bigger than the other end. I thought of making quite a solid shape and then make other curve shapes to extrude and cut it, but then after that, I will need to build and extend around the rim of the entire shape.

[laughingcreek · Accepted solution]

here's 3 possibilities. number 2 is probably the one that gives the most control and cleanest surface (important if your building out from it)

[Anonymous]

Thanks for the help

I would like to know how did you create that sketch 4 on component1

In addition, for component3, I think you did it by create form which I have never tried. But I was wondering, if it is possible to create specific measurements?

[laughingcreek]

sketch 4 in component 1 is created by using "intersecting curves" projection.  the first 2 sketches are the input.

you can get dims pretty close using form, but not really exact.  there are tricks you can do do get things pretty good, but it can be tricky.  I also don't suggest messing with form till you get a handle on the rest of fusion.  it's a different skill set.

[fusiondesigner]

Interesting question. The first thing that came to mind when I heard "pringles shape" was the inner face of a torus. This method may not meet your needs, but posting nevertheless in case somebody finds it useful. Offsetting the torus horizontally or vertically or perhaps rotation should result in different asymmetric variations on the basic shape.

43ac551c-a49f-442c-9e7d-2edda7e59ad9,640,620

[Anonymous]

I was wondering if one end I wanted to make it curve down, which method would suit me the best?

[fusiondesigner]

FYI haven't been able to attach screencast despite several tries, keeps giving an error. Attached as video.

[laughingcreek]

in the attached the only thing I did was adjust the tangent handles in the first sketch. 

[MichaelT_123]

Hi Fellows,

What the divergent Forum it is! Even recipes for frying chips are shared here!

But seriously, a chip's shape is the example of quite important and omnipresent function family called saddle functions. In many cases, they express real physical phenomena. The underlying motive here is to represent two (or more) contradicting processes/forces. The shape/curvature of a saddle can vary greatly.

Some examples:

Potato chip – its perimeter stiffens first and then it opposes forces of a shrinking slice interior.

When a thin sheet is punched, induced stresses on a periphery will warp it.

Catenary surface, representing a membrane stretched on a non-planar perimeter.

The brim of the hat of a skilful man chewing gum and waking at the same time under the scorching sun. Where could this be...?

Only by these few examples, it is evident that one has to be very attentive in selecting the right curvature.

So below, there is the example of implementing perhaps the basic/classical saddle function using the hyperbolic-parabolic equation, albeit adapted slightly to a lovely potato chip.

The respective parametric equation of it is:

            θ ∈ <0,2*π>

            x = A(f)*cos(θ)

            y = B(f)*sin(θ)

            z = x²/a²-y²/b²

When it is carefully fried the chip looks like this:

Especially for Mexicans, the rectangular <x,y> co-domains will result in the Tortilla chiplet. Am I right?

The linked media files have 4K resolution and as such, should be viewed on the appropriate hardware and using the external standalone capable media player (VLC, WMP,etc.). The stereo file requires red/cyan anaglyph glasses.

https://a360.co/3axKxkO         -  mono video       size: 17 MB

https://a360.co/2Y3qF3G        -  stereo video       size: 43 MB

Regards

MichaelT

PS.

I guess F360 offers (amongst other things) also the opportunity to simulate a chip frying process.

In the file attached file, you will find the potato slice precursor ready for the simulation.

The piece is distorted a little bit to avoid the singularity during the first phase of the simulation.

Use the thermal simulation method, applying different ( and exaggerated) thermal expansion/shrinkage coefficients to the external ring and the interior of the slice, respectively. I am on a diet so I can't do it myself. However, I would be curious to see the fry 😊.