방적

VELOCITY DISTRIBUTION OF RUNNING VISCOELASTIC YARN SUBJECTED TO DRAWING.

  • 출판일1991.12
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 212
A one-dimensional constitutive equation of the integral type described in a convected coordinate system was used to obtain formulas for the velocity distribution, tension, and running time of viscoelastic yarn that runs between the feed-roller and take-up roller in a steady state. The formulas were expressed simply by the creep compliance of yarn, draw ratio, and feed-roller velocity. The predictions of velocity distribution, tension, and running time agreed with experiments on polyethylene terephthalate monofilament yarn. The tension increased with feed-roller velocity and draw ratio. Both calculated and observed curves of velocity distribution along a yarn sloped upward and increased monotonically. However, the observed results were smaller than the calculated ones. 4 refs.
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