rotating/misalignment in yarns

[dyeyanie]

Hi Louise,

With regards to my topic, I'm intended to create a textile via GUI with misalignment angles of the yarns. So I set up some patterns and started modifying the yarn sections. I created them as Constant and checked the Rotate box with 5 deg rotation angle. I did that for both sides (weft and warp). I'm not really satisfied with the generation because I could see some "penetration" between the yarns at certain points. However, I tried to modify them with "Interpolation at nodes" and "Interpolation at points" but the generation is getting worse.

How could I specify them correctly? Should I pick the intersect yarns while make changes? Or I just highlight them one by one and change the interpolation values?

Yanie

[louisepb]

Hi Yanie,

I assume , when you say that you are changing to interpolation at nodes/points, that you mean that you are then changing the cross-sections at the nodes/positions? If you still have intersections then you clearly need to make further changes to the cross-sections to minimise the intersections. Do you have samples/images of the textile you're trying to model so that you can see what the cross-sections actually look like?

Louise

[dyeyanie]

Hi Louise,

Attached here is the cross section of my geometry. I'm using lenticular shape here and I put 5 deg rotation and constant option under Modeller. How could I change them to ensure that the yarns are not intersect to one another?

Yanie

[louisepb]

Hi Yanie,

I don't really understand why you've applied a 5 degree rotation to the yarns. For the long stretches where they sit on top of the fabric surely they would stay flat - what would cause them to rotate? It is quite possible that they would rotate, however, where they cross from one side of the fabric to the other. If you chose interpolation between nodes or between positions then you could change the rotation locally. As far as getting rid of the intersections is concerned you will need to change the cross sections locally, either at a given node or position as appropriate, to a shape which will minimise the intersections. As the intersections seem quite severe you may find that you need to move the nodes or insert extra ones to get a yarn path/cross-section combination which works. As I said before you'll need to experiment to get it right.

Do you have a sample of the actual weave that you're trying to model. If so this should give you some indication of the sort of cross-sections you need to use in order to get a realistic model.

Louise

[dyeyanie]

Hi Louise,

What I'm trying to do is to draw a misalignment of the yarn angle condition that occur in yarns. The ranges of misalignment angles are varies from -5 to 5 deg. So, I started my trial with 5 deg first. Previously, I create them via python script but seems so bad in its generation. So, I tried to create them in GUI. As I said earlier, I use lenticular shape with certain dimension of the yarn. I also used zero gap sizes between the yarns. The original pattern is stated in the picture.

Yanie

[louisepb]

Hi Yanie,

Ok - in that case you'll just have to follow my suggestions for rectifying the intersections where they occur.

Louise

[dyeyanie]

Hi Louise,

Thanks for that. I'll try with intersections between nodes.

Yanie.