Abstract
Abstract The fatigue behavior of cotton warps was studied by a newly weaving load simulator (WLS) developed in our laboratory. Reborn hairiness, strength retention, and elongation retention of sized warps were adopted to evaluate the physical and mechanical properties of sized warps under stretch-abrasion cyclic loading. The influences of different fatigue cycles on the above three indicators were also discussed. The results indicated that the fatigue behavior of the cotton warps accompanied by abrasion yields a three-parameter Weibull distribution. All the fitting plots show acceptable linearity. Moreover, there is a strong relationship of quadratic polynomial between the tensile properties and the fatigue cycle of the sized warps according to the scatter fitting (R2 > 91.08%). Similarly, there is also a good relationship of quadratic polynomial between the reborn hairiness index and the fatigue cycle of the sized warps (R2 > 94.51%). Finally, regardless of the strength retention, elongation retention, and reborn hairiness, the physical and mechanical properties of the cotton warps still change with the continuous increase of the fatigue cycle after 40% of the fatigue cycle, but it is not significant. The research was helpful to estimate the capacity of the warps to sustain failure.
Highlights
The service performance of sized warps is mainly the fatigue characteristic of yarns, obviously affecting the appearance and properties of the fabric and influencing the production efficiency
The twist level and linear density effects on the fatigue cycle of yarns are apparent, and the corresponding fatigue can be reasonably predicted from the three-parameter Weibull distribution model
The results reveal that the strength retention (SR) and elongation retention (ER) of the yarn do not continuously decrease with increasing fatigue cycles but reach a threshold value at a 40% of fatigue cycle, after which they start to decline slowly
Summary
The service performance of sized warps is mainly the fatigue characteristic of yarns, obviously affecting the appearance and properties of the fabric and influencing the production efficiency. The tensile failure mechanism, under cyclic stretching, bucking, and axial abrasion, of yarns has been extensively studied by many researchers. Behera et al studied the mechanical properties (such as cohesion power, adhesion power, abrasion resistance, and bending rigidity) of size films along with the weaving performance of the sized yarn [5]. Seung et al and Mishra et al investigated the mechanical properties and abrasion behavior of yarn in fabric form [8, 9]. The rate of fatigue damage expressed in terms of loss in tensile property indicators has proven to be useful in assessing the fatigue-sustaining capacity of yarn and thereby predicting impending failure. The relevant literature on the characterization of physical and mechanical properties of sized warps under tensile fatigue loading is scarce, considering various factors
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