The optimization of rotor spun yarn tensile model by changing-pitch system

X.Y. Jiang, Jinlian Hu, R. Postle, K.P.S. Cheng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


This paper reports a refined model to predict the tensile behavior of rotor spun yarn from a knowledge of specimen specifications and yarn strain. Fundamental approaches used in yarn modeling include discrete-fiber-modeling principle, an energy method, and a “shortest-path” hypothesis. The study is carried out on the basic of a coaxial-helix structural model, taking account of non-uniform yarn packing density. Especially, changing-pitch system is first time introduced in yarn modeling. A pitch function has thus been determined by the aid of non-linear regression method and curve-fitting approach based on images obtained from tracer fiber technique.||Evaluation of the present model is also given against experimental data, together with a theoretical analysis of fiber strain distribution. It is confirmed that the present model is, due to the introduction of changing-pitch system, not only successful in explaining the experimental observations, but also believed in optimizing tensile drawing process.
Original languageEnglish
Title of host publication[Missing Source Name from PIRA]
Publication statusPublished - 2001
EventAsian Textile Conference [ATC] -
Duration: 1 Jan 2001 → …


ConferenceAsian Textile Conference [ATC]
Period1/01/01 → …


  • Energy method
  • Rotor spun yarn
  • Jammed region
  • Changing-pitch system


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