Bending Rigidity of Yarns

Abstract

The bending behavior of yarn is affected by mechanical properties, arrangement and interaction between its constituent fibers and yarn geometry. In this study the yarn bending rigidity was obtained from the tensile modulus of its constituent fibers and yarn geometry and structural parameters and it was shown that the dimensionless yarn bending rigidity decreased as the ratio of tensile modulus to the shear modulus of the constituent fibers increased. Furthermore, the yarn bending rigidity decreased as the surface helix angle of the yarn increased. When compared with previous research, there was good agreement between the findings of Owen, Zurek, and Platt’s and the results of this study.

The influence of component stiffness on the structure of multi-thread fancy bouclé yarn

“…In a fabric form, bending stiffness affects buckling, drape and handle of fabrics and clothes [2,3]. Additionally, it has an impact on their tailorability, formability and adaptability to the various mechanical forces and on deformation during sewing [2]. Furthermore, bending stiffness contributes to the crease resistance of fabrics and their recovery from crease [2,3].…”

“…Additionally, it has an impact on their tailorability, formability and adaptability to the various mechanical forces and on deformation during sewing [2]. Furthermore, bending stiffness contributes to the crease resistance of fabrics and their recovery from crease [2,3]. Shape instability of knitted and woven fabrics is also related to bending stiffness [4].…”

An improved Capstan equation including power-law friction and bending rigidity for high performance yarn

“…the friction direction is similar to the direction of motion. Park and Oh [14] considered that the bending rigidity of yarn could be calculated from the tensile and shear modulus of its constituent fibers, yarn geometry and structural parameters, as follows.…”

Mechanical Analysis of Woven Fabrics:The State of the Art

“…The cylindrical-helix model of Hearle et al (Hearle et al, 1959), the conical-helix model of Önder and Başer (Önder & Bacer, 1996) and the statistical model of Komori (Komori, 2001) approached the yarn mechanical modelling from different points of view, depending on the considered alignment of the fibres. The tensile, bending and torsional behaviour of the yarns were approached using the force, the stress-analysis and the energy methods (Backer, 1952;Platt et al, 1959;Freeston & Schoppee, 1975;Choi & Tandon, 2006;Park & Oh, 2006).…”