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Bending Rigidity of Yarn Using a Two Supports Beam System

Research and development

Authors:

  • Ghane Mohammad
    Department of Textile Engineering, Isfahan University of Technology, Isfahan, Iran
  • Sheikhzadeh Mohammad (j/w)
  • Halabian A. M.
    Department of Civil Engineering, Isfahan University of Technology, Isfahan, Iran
  • Khaburi S.
    Department of Textile Engineering, Isfahan University of Technology, Isfahan, Iran

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Abstract:

The simple cantilever is a common method to measure the bending rigidity of fabrics. However, the small dimension and untwisting of the free end of yarn are the major difficulties in the simple cantilever method. In this work, a two support beam system was used to measure the bending rigidity of yarn. The yarn was treated as an elastic beam fixed at one end, supported by a simple support at the other, and loaded near the middle. The maximum deflection of the yarn and the distance of the applied load from the supports were measured accurately. Using classic elastic equations in the small deflection case, the bending rigidity of the yarns was then calculated. Comparison between the shape of deflection of the yarn and the elastic beam curve in the small deflection case showed reasonable agreement. It was concluded that the bending rigidity of yarns can be calculated by using the small deflection equations.

Tags: bending, bending rigidity, elastic beams, small deflection.

Published in issue no 3 (68) / 2008, pages 30–32.

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