In this work, a method has been developed to simulate fabric surface appearance from achieved yarn properties. The simulation of woven fabric surface appearance depends on yarn and fabric cross sectional geometry as well as on yarn measurements and yarn image recordings. A yarn winding device has been designed to take snapshots by digital video camera along the length of an actual yarn. The fabric simulations are confined to single fabrics of plain, matt, and twill weaves.

No abstract

This article proposes a method for simulating plain woven fabric appearance based on photographs taken by still camera of actual yarns along their lengths. The survey mathematically models the transformation of yarns from a straight circular cylinder to a flattened and crimped form in the fabric structure. The simulation is performed by yarn images that are obtained by image processing techniques and resized according to mathematical models developed by means of the software prepared. Transforming circular yarn cross-section to elliptical one for simulating yarn flattening and modelling the crimped shape of yarn by an elastica curve are both convenient and realistic. The simulation of plain woven fabric can be performed by a method based on raster graphics. This article provides a model for yarn shape in fabric structure as well as a method for simulating plain woven fabric appearance. This method may be used in textile industry for design and quality control.

iplik uzunlugu boyunca 'rekilen gerc;ek iplik fotograflarmdan dokuma kuma~ yapllannm bilgisayarda simtilasyonunu gerc;ekle §tiren bir metat geli §tirilmi §tir. iplik, dizayn edilen bir iplik 'rekim dlizenegi ile belirli periyotlarla 'rekilirken, ipligin uzunlugu boyunca dijital video kamera ile goriinttisti ahnml~tlr. Bu c;ah~mada bezayagl, panama ve dimi orgtilere ait kuma~ simtilasyonlan yapllml §tlr. Kuma § yaplsmdaki iplik egrileri matematiksel olarak modellenmi § ve kuma § ytizeyine dik dogrultudaki iplik gortinttilerinin izdti~timli geli §tirilen bilgisayar programl ile elde edilmi §tir. Anahtar kelimeler: Kuma § simtilasyonu, iplik gortinttisti, kuma § gortinttisti, elastik egri, iplik yassllmasl.

It is a widely adopted approach to woven fabric design in industry, to define the construction parameters of the fabric to give a certain fabric unit weight. It is also equally important, from the engineering point of view, to design a fabric which fulfils the conditions of weavability and certain quality criteria. It is, thus, the aim of this study to develop a method based on engineering approach in practical lines to design woven fabrics of simple or complex structures, including figured styles and double structures that satisfy these basic requirements. The method will particularly be useful if it is incorporated in computer aided woven fabric design software.