10.23.2010

Organizational processes of interlacing patterns.

A system of independent lines under deformation results in an irregular transformation of curved elements. Surface emerges through the interlacing of the lines that deform in a more coherent way as the lines tend to curve depending to each other. Surface becomes structure through weaving as soft elements become rigid and act as a group.


Change of surface porosity due to deformation.

Phases of geometrical disposition of threads in single-layer woven structures by Novikov.
The decrease in the crimp height of warp thread (hwp) is equal to increase in the crimp height of weft thread (hwft). With equal diameters dwp=dwft of warp and weft threads, the crimp height of the warp thread hwp increases by 0.5 r, and the crimp height of the weft thread hwft decreases by the same value.
Thus, it is observed that dwp+dwft=hwp+hwft=4r.

Source: Elena Chepelyuk, Valeriy Choogin, Jenny Cousens, Michael Hann, (2010) "Geometric disposition of threads in single-layer woven structures", International Journal of Clothing Science and Technology, Vol. 22 Iss: 1, pp.35 - 48

Physical Prototypes
In order to examine the structural behaviour of woven textiles physical specimens will be tested under tension and shear stress. For that reason 4 pairs of specimens were created with different patterns. Each pair consists of one unstiffened and another stiffened prototype. Thermoset resin and a hardener were used to stiff the prototypes.
The aim of the experiment is to define the deformation of each specimen and examine the differences between them. The deformation diagram will be useful in order to specify the parameter of distance between the threads in order to create a structural skin that can take the load.

Geometrical disposition of physical prototypes - Diagrams.

10.05.2010

Form finding processes - Physical prototypes

I started making physical prototypes by using different kind of woven techniques. I investigate how the grid behave when changing its structural parameters.

prototype1





Braided structures

Weft becomes warp, warp becomes weft.
Tubular structures
Source:Goran Demboski, Gordana Bogoeva G.;'Textiles structures for technical textiles' in Bulletin of the Chemists and Technologists of Macedonia, Vol.24, No1, 2004

Knitted structures

Weft knitted
Neighbouring loops of one course are created from the same yarn.
- Elastic, stretchable and easily deformed.
Introducing oriented yarns into the structure to increase mechanical properties.

Warp knitted
Neighbouring loops of one course are not created from the same yarn.
- Mechanical properties are in many cases similar to those of woven structures.

Source:Goran Demboski, Gordana Bogoeva G.;'Textiles structures for technical textiles' in Bulletin of the Chemists and Technologists of Macedonia, Vol.24, No1, 2004

Woven structures


Two sets of yarns mutually interlaced into a textile structure. Weft and warp are separate.
Mechanical properties of woven structures depend on:
- type of raw materials
- type and count of warp and weft yarns
- yarn density
- type of weave structure
Warp and weft direction: Highest strength
Bias direction:Lower mechanical properties,higher elasticity and lower shear resistance.

Triaxial woven structure:
Exceptional mechanical properties in several directions.

3-D Weaving
- High mechanical properties in x, y and z directions

Source:Goran Demboski, Gordana Bogoeva G.;'Textiles structures for technical textiles' in Bulletin of the Chemists and Technologists of Macedonia, Vol.24, No1, 2004