Investigation of Fabrics Tensile Deformations

Abstract

Tensile deformations of textile fabrics were analysed in this work. Five different woven fabrics were chosen for the experiment. Fabrics were different in fibre content, thickness, density and finishing. The specimens were cut in certain directions and tested using relaxometer device. Testing were performed at four experimental stages. Each of them had a fixed load. During experiment it was noticed that the direction of specimen’s deformation often disagrees with the direction of the force vector. It was defined that types of specimen’s deformation were under the influence of shear effect. Four main characteristics were measured to make the practical analysis: elongation at fixed load εn, specimen’s width decrease Δbn, shear angle αn and difference of specimen’s vertical edges length Δln. It was found that wave structure of the textile fabrics, existence of elastane fibre, fabric’s coating and direction of the tensile force have influence on elongation of specimen and on the contraction rate of specimens width. As a result of this research the characteristics mentioned above were systematized and three specific cases of deformation non-uniformity were established.