Effect of bending rigidity, Poisson’s ratio and surface friction of fabrics on the stretching step of the comprehensive handle evaluation system for fabrics and yarns

Abstract

The main topic investigated in the present paper is the analysis of the effect of bending rigidity, Poisson’s ratio and surface friction of fabrics on the stretching step of the comprehensive handle evaluation system for fabrics and yarns (CHES-FY) by using a theoretical tensile model. Simulated pulling-out force–displacement curves of the stretching step for several cases were investigated and compared with the experimental curves. The results showed that bending rigidity and surface friction of fabrics were the important factors that affected the test results of the stretching step. The slope of the simulated pulling-out force–displacement curve becomes larger by including the bending rigidity and surface friction of fabrics. However, the effect of Poisson’s ratio was small and was able to be neglected in the formulation of the model. In addition, the relationship between the bending indices, i.e. ω and k, and the diameter of the testing pins was discussed. It has been confirmed that the effect of the bending rigidity of fabrics on the pulling-out force–displacement curve strongly depended on the diameter of the testing pins. The model also detected that the surface friction effect became more remarkable for fabrics with a high tensile modulus.