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Title: FAILURE MECHANISM IN STAPLE YARNS

Author
item CYBULSKA, MARIA - CLEMSON UNIVERSITY
item GOSWAMI, BHUVENESH - CLEMSON UNIVERSITY
item McAlister Iii, David

Submitted to: Textile Research Journal
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/1/2000
Publication Date: 12/1/2001
Citation: CYBULSKA, M., GOSWAMI, B.C., MCALISTER III, D.D. FAILURE MECHANISM IN STAPLE YARNS. TEXTILE RESEARCH JOURNAL 71 (12) pp. 1087-1094. 2001.

Interpretive Summary: Most publications on the mechanics of staple yarns are focused on ring spun yarns. Currently there are four spinning systems (ring, rotor, air jet, and vortex) that comprise the short staple systems (fibers less than 2 inches). The latest of these systems is Vortex - for which no failure mechanism data are available. The objectives of this research were to determine the typical failure mechanisms that occur in the different yarn structures for the short staple spinning systems and to characterize these failures in terms of the yarn structural parameters. Through image analysis, it is possible to observe the yarn when applying a load and thus determine the yarn structure before and after failure. Through this analysis, a better understanding of the failure phenomenon will allow for the formulation of assumptions for the development of models for predicting yarn tensile behavior.

Technical Abstract: The failure mechanism in staple yarns is strongly influenced by yarn structure. Manufacturing methods impose certain constraints on the disposition and distribution of fibers in the yarn cross section. This paper investigates the failure mechanism in ring, rotor, air-jet, and vortex yarns. The yarns are subjected to uniaxial loading on the tensile tester, and images of the yarns before and after breaking are recorded. Image analysis of the failure regions yields some interesting features and reveals typical mechanisms occurring in different yarn structures. The failure mechanism in each yarn type is discussed in terms of some basic parameters characteristic of the structure.