Geometry. Three-Spoke Dovetailing Tile Tessellation. "trispokedovetile"?

Discussion in 'Science and Technology' started by Peter Dow, Nov 19, 2016.

  1. Peter Dow

    Peter Dow Member

    I've posted this image which I've described as a
    "Three-spoke dovetailing tile tessellation".

    [​IMG]
    Trispokedovetile tessellation by Peter Dow, on Flickr

    which is a tessellation of this tile shape,

    [​IMG]
    Trispokedovetile by Peter Dow, on Flickr

    Check my Flickr page for the preceding design iterations and inspiration.

    I've named the shape
    Trispokedovetile
    which is a contraction of "tri-spoke dovetailing tile".
    • "tri-spoke" because the shape is similar to a 3-spoke motorcycle wheel with three bites taken out of it.
    • "dovetailing" because the tiles interlock like a dovetail joint

    But it is quite possible this shape is already known to geometry and already has been named.

    Do you know if this shape has already been named? If so please do reply to tell me what the name is.
     

    Attached Files:

    2 people like this.
  2. tumbling.dice

    tumbling.dice Senior Member

    Klein Bottle.

    [​IMG]
     
  3. Peter Dow

    Peter Dow Member

    Trispokedovetiles Animation Webpage

    I've programmed a webpage using Javascript to display an animation which shows a range of different trispokedovetiles, each of which can be specified by a "CIRCLE" percentage, which is the ratio as a percent of two parameters -

    1. A "HEXAGON" parameter length - always nominally "100%"
    2. A "CIRCLE" parameter length - the animation varies this between 100% and 135%, though up to 150% is possible in theory.

    So you can specify the "CIRCLE" percentage to specify a particular shape of trispokedovetile.

    Here is a still image from the animation - showing the trispokedovetiles with "CIRCLE" = 125%.

    trispokedovetiles_1200.png

    I've tested the animation in Chrome and Internet Explorer browsers and it works fine for me.

    But it is not working in Firefox for some as yet unknown reason.

    Let me know by replying here if you have any other problems with the animation not displaying for you.
     
    2 people like this.
  4. guerillabedlam

    guerillabedlam Senior Member

    For your firefox issue, if you used the -webkit- prefix to run it, maybe try copying those lines replacing that prefix with -moz- and leaving the rest of the code the same.
     
  5. Peter Dow

    Peter Dow Member

    trispokedovetile_1x3D.png

    Tutorial on how to produce 3D images from my trispokedovetiles webpage

    Step 1.

    Create a line image using my webpage, this is for CIRCLE = 120. Right click save image as.

    trispokedovetile_line_C120_600px.png

    Step 2

    Use an image editing program such as paint.net

    Crop the image to suit and use the paint bucket tool to fill the tiles you want to make 3D with another colour, I chose red.

    trispokedovetile_line_C120_600px_3_flood_fill_red.png

    Step 3

    Use the magic wand tool with option flood mode global to select all the red area and then copy and paste the red area into a new image

    trispokedovetile_C120_3_cut_paste_red.png

    Step 4

    Use paint bucket tool to colour the tiles black

    3-trispokedovetiles.png

    Step 5

    Upload the black and white image to selva3d.com with option "Logo/text", adjust the height and rotate the image to suit and right click to save the image.

    trispokedovetiles_3x3D.png
     
  6. Peter Dow

    Peter Dow Member

    Now to consider the important issue of interlocking trispokedovetiles against movement in the direction normal to the tiled plane, which for the application of tiled armour would be the normal to the armour surface, in the direction of a bullet's path.
    BILAYER TRISPOKEDOVETILES
    I propose that the unit armour tile be comprised of 2 joined trispokedovetiles with matching HEXAGON parameters but each with a different CIRCLE percentage.

    For example, suppose we choose trispokedovetiles with CIRCLE = 100% and 121%.

    C100.jpg C121.jpg

    The reason for choosing C100 for the outer layer of the armour is because its 120 degree angle corners would be more robust.

    The reason for choosing C121 for the inner layer of the armour is because CIRCLE = 121% offers the largest percentage where the neck attaching the outer part rings is at least twice the thickness of the ring, attempting to balance the robustness of the ring parts to the robustness of the neck versus tensile stresses.

    why121.jpg

    Stacking and joining those together forms a bilayer trispokedovetile, "C100+C121".

    C100C121.jpg C100+C121_3D.jpg

    Drawing the 2 layers semi-transparently we can see how the bilayer trispokedovetiles would interlock in the normal to the plane.

    100+121_crop_low.jpg

    2/3rds of the tiles can be slotted together, either the yellows and the blues or the yellows and the purples or the blues and the purples.

    However the final 1/3rd of the tiles would not simply slot in and would have to be inserted by joining the two halves of the bilayer trispokedovetile in situ.
     
  7. Peter Dow

    Peter Dow Member

  8. Wu Li Heron

    Wu Li Heron Member

    I'm a Rubic's Cube fanatic and you could possibly make a sphere with that shape, just a thought.
     
  9. Peter Dow

    Peter Dow Member

    TRISPOKEDOVETILES ROUTER CUTTING

    My trispokedovetile CAD-CAM webpage now offers an (X,Y,Z) option for router cutting using rotary tool paths between spaced out tiles and options to cut holes in the tiles too -

    trispokedovetiles_spaced.png

    I've simulated the CNC router code -

    routersimulation_50.jpg
     
  10. Logan 5

    Logan 5 Confessed gynephile

    Too bad you don't have it in .stl or .obj....
     
  11. SpacemanSpiff

    SpacemanSpiff Waddayagonnado Staff Member Lifetime Supporter Super Moderator

    just a spammer/self promoter ..obviously not here for discussion ...
     

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