Influence of cyclic tensile straining parameters on the tensile characteristics of compact yarn

Abstract

It would seem that previous tensile fatigue studies in yarns using the cyclic loading and extension principles were carried out with limited sets of variables and levels. To get a clear understanding of the tensile fatigue behaviour of yarns and in order to study the yarn damage under the influence of cyclic tensile straining, an investigation on the influence of various cyclic tensile straining parameters, extension level, extension rate and straining cycles at five different levels, on the tensile breaking load and breaking extension characteristics of compact yarn of count 14.75 Tex has been carried out. The extension level of 8 mm, the extension rate of 400 mm/min and the number of straining cycles of 2500 have resulted in the maximum drop in the breaking load and extension values of the yarn which are 30.4 and 40.25% lower than the average breaking load and extension values of the unstrained yarn.