MECHANICAL BEHAVIOUR OF TWISTED YARNS. 1. FATIGUE BEHAVIOUR OF TWISTED CONTINUOUS FILAMENT YARNS. 2. GEOMETRIC STRUCTURE AND FORM OF YARNS

Abstract

Research was carried out into the behaviour of twisted continuous filament yarns as they are subjected to repeated cyclic stresses. A fatigue tester designed to give a constant extension stroke to a yarn mounted between two jaws was constructed and results of measurements of the slack developed are presented. The occurrence of filament breakage during the course of a test was found to be far more pronounced in the case of low twist yarns than in more heavily twisted yarns. Extension cycling and load cycling tests on the Instron tensile tester are included. Apparatus was constructed to investigate the recovery of yarns from a predetermined static strain and a few results are given. The design of a more versatile fatigue tester employing a larger number of yarn stations is under consideration and is discussed briefly.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1961
Accession Number
AD0266565

Entities

People

  • A. J. Booth
  • J.w. Hearle
  • O. N. Bose

Organizations

  • Manchester University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Fatigue Life
  • Fatigue Tests (Mechanics)
  • Fibers
  • Geometric Forms
  • Geometry
  • Material Degradation Processes
  • Materials
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Monofilaments
  • Plastics
  • Refractive Index
  • Stress Strain Relations
  • Tensile Strength
  • Tensile Testers
  • Textiles

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Electrical Engineering
  • Reinforced Composite Materials