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Investigation of Initial Warp Tension and Weave Influence on Warp Yarn Diameter Projections

Rukuižienė Ž., Kumpikaitė E.

Fibres & Textiles in Eastern Europe

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2013

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Vol. 21, no. 5 (101)

43--48

EN

The influence of initial warp yarn tension and fabric weave on warp yarn projections are investigated in this article. Fabrics were woven with different initial tensions and weaves. The warp yarn projections were measured beside the floats in the central part of fabrics. The dependencies of warp yarn projections on initial warp yarn tensions and dependencies of warp yarn projections on different weave factors were also determined. According to the coefficient of determination, it was determined that the average weave factor F, which was proposed by Ashenhurst, evaluates the geometric variations of the fabric the best. During the investigation, the dependencies of warp yarn projections on initial warp yarn tensions of different fabric weaves were established. The decrease in warp yarn values with increasing initial warp tensions was determined.

PL

Zbadano wpływ wstępnego naprężenia osnowy i splotu na średnicę nitek osnowy. Tkaniny utkano przy rożnych splotach i naprężeniach. Średnicę nitek mierzono w środkowej części, poza przeplotami. Oznaczono również zależności pomiędzy średnicą nitek i wstępnymi naprężeniami przy względnieniu rożnych splotów. Stwierdzono, że najlepiej odwzorowuje zależności w tkaninie współczynnik F zaproponowany przez Ashenhursta.

2

Prediction of woven fabric properties using software ProTkaTex

Kolčavová-Sirková B., Mertová I.

Autex Research Journal

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2013

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Vol. 13, no. 1

11---16

EN

Fabric properties and fabric structure prediction are important in each industry domain. Generally all professional CAD packages for woven textiles system will be able to achieve basic fabric simulation and production output. A good CAD system should enable you to create design (dobby and jacquard woven fabric) ideas quickly and easily to enhance the way you work. The differences among competing systems fall mainly into the following categories: ease of use; speed of operation; flexibility of operation; advanced features; technical support; and ongoing software development. Computer simulation or prediction is oriented on standard woven fabrics, technical textiles, and composites. This article focuses on the presentation of software ProTkaTex and its use in the prediction of woven fabric properties. The software implements a generalized description of the internal structure of woven fabric on the unit cell level, integrated with mathematical models of the fabric relaxed state. User can calculate selected mechanical and end-use properties of dobby and jacquard woven fabric as well as can evaluate fabric behavior before real weaving. The major challenge is to develop software that industry will use in design centers for creation and development of new fabric structures for technical as well as clothing application.

3

Methodology for Evaluation of Fabric Geometry on the Basis of the Fabric Cross-Section

Kolcavova Sirkova B., Vysanska M.

Fibres & Textiles in Eastern Europe

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2012

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Vol. 20, no. 5 (94)

41--47

EN

A woven fabric structure is defined by mutual threads interlacing in the fabric as well as the basic parameters of the fabric. The interrelation among fabric parameters can be obtained by considering a geometrical model of the fabric and specific experimental methods. The geometrical model is mainly concerned with the shape taken up by the yarn in the warp or weft cross-section of the fabric. This article provides a possible methodology for evaluation of geometric parameters of threads in the real longitudinal and transverse cross-sections of fabric. From an individual cross-section of the fabric using image analysis it is possible to define the diameter of threads, their deformation, thread spacing, the maximum displacement (height of binding wave) of the thread axis, the angle of the thread axis (interlacing angle), the length of the thread axis in the cross-section of the fabric, the crimp of threads in the fabric, and the real shape of the binding wave through wave coordinates. The parameters mentioned are possible to use as input for mathematical modelling of the fabric structure and for prediction of mechanical and end-use properties of fabrics.

PL

Struktura tkaniny określona jest przez wzajemne przeploty nitek i podstawowe parametry tkaniny. Wzajemne zależności pomiędzy parametrami tkaniny mogą być określone poprzez tworzenie odpowiedniego modelu i badania eksperymentalne. Geometryczny model został opracowany poprzez badanie kształtu przeplotu poszczególnych nitek. Opisano odpowiednie metody dla określenia wzdłużnych i poprzecznych przekrojów tkaniny. Na podstawie poszczególnych przekrojów tkaniny można określić średnice nitki, jej deformacje, odległości miedzy nitkami, maksymalne odchylenie od osi nitki, kąt osi nitki, długości osi nitki w stosunku do określonego odcinka tkaniny, skurcz nitki i rzeczywisty kształt przebiegu nitki w stosunku do współrzędnych tkaniny. Powyższe parametry mogą służyć jako wielkości wejściowe modelu dla określenia mechanicznych i użytkowych właściwości tkaniny.