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joe_c14-Alexandrite
14-Alexandrite
August 10, 2023
Solved

Modeling a cloth Knot

  • August 10, 2023
  • 3 replies
  • 1635 views

Hello

 

i need to create a knot but is not working out well. The spinal or toroidal bend is not suited for this.  I am using Creo 7.0. Any tips are much appreciated

 

thanks

 

Drawing.pngthumbnail_image001.png

Best answer by Patriot_1776

I agree with Tom, unless there is a reason why you absolutely HAVE to model this (or want to do it just to show that you can and as a learning experience (which I applaud - if I had time I would but I'm too busy), then just go the easy route and move on.  This can't be done with either a spinal or toroidal bend, or with warp unless you try an endless amount of warp features and even then you probably couldn't do it.  No, first you'd need to study the ACTUAL knot you'd use, then do sweeps that would mimic the trajectories and the TWISTS in the trajectories, and even then you couldn't simulate the way that flat material would bunch up as you tightened the knot.  The edge serrations aren't the issue, it's the trajectories and twists.  A knot on a circular cross section rope would be pretty easy, actually (though more complex if you actually modeled twisted/stranded rope), especially compared to this.

 

Best of luck!

3 replies

tbraxton
22-Sapphire II
tbraxton22-Sapphire II
22-Sapphire II
August 11, 2023

If you need the representation for a drawing view only then I would create a symbol for the knot using the image you posted and use that for the drawing view detail.

 

If you really want to model an approximation of the knot, then variable section sweep is the best way to approach creating the 3D geometry.

    P
    19-Tanzanite
    pausob19-Tanzanite
    19-Tanzanite
    August 11, 2023

    Not sure, but maybe give the "Warp" tool a go for this.

    pausob_1-1691774389109.png

     

     

    Patriot_1776
    Patriot_177622-Sapphire IIAnswer
    22-Sapphire II
    August 11, 2023

    I agree with Tom, unless there is a reason why you absolutely HAVE to model this (or want to do it just to show that you can and as a learning experience (which I applaud - if I had time I would but I'm too busy), then just go the easy route and move on.  This can't be done with either a spinal or toroidal bend, or with warp unless you try an endless amount of warp features and even then you probably couldn't do it.  No, first you'd need to study the ACTUAL knot you'd use, then do sweeps that would mimic the trajectories and the TWISTS in the trajectories, and even then you couldn't simulate the way that flat material would bunch up as you tightened the knot.  The edge serrations aren't the issue, it's the trajectories and twists.  A knot on a circular cross section rope would be pretty easy, actually (though more complex if you actually modeled twisted/stranded rope), especially compared to this.

     

    Best of luck!

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