A study on fatigue behaviour of cotton/lycra core spun yarns

Abstract

Core spun yarn gives denim fabrics durability and flexibility, which has increased the focus on these yarns among denim manufacturers in recent years. These yarns undergo tensile fatigue loading, a typical phenomenon that happens on various parts of clothing, during use and wear. The study on the response of yarns during cyclic loading is essential because it leads to a better understanding of the growth characteristics when repeatedly loaded during the use of core spun yarn fabrics. In this study, the impact of various production parameters such as linear density, stretch percentage, twist multiplier, and the number of cyclic loading on the fatigue value of core-spun yarns was investigated. 18 different core spun yarns were manufactured by modified ring spinning to investigate the effect of various production parameters on fatigue value before and after 10, 20, and 30 load cycles. Experimental results showed that there is an increase in fatigue value with an increase in the number of load cycles. Statistical analysis showed that there is a significant effect of linear density, stretch percentage, and twist multiplier on the fatigue value of yarn. There is a reduction in fatigue value with an increase in linear density, stretch percentage, and twist multiplier of yarn. The contribution of the number of cyclic loading was found to be more dominating in comparison to other process parameters like linear density, twist multiplier, and stretch percentage on the fatigue value of core-spun yarns.

Keywords

• fatigue value
• stretch percentage
• twist multiplier
• cyclic loading
• linear density