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Strength of Materials

, Volume 47, Issue 3, pp 474–480 | Cite as

Method for Assessing the Mechanical Characteristics of Braided Core-Sheath Ropes Made of Synthetic Multifilament Yarns

  • M. P. Zemtsov
  • V. I. Skripchenko
Article

A new approach to the calculation assessment of strength and deformation capacity of braided ropes of the core-sheath type made of multifilament polyamide yarns is presented. The proposed method, referred to as the “rule of mixtures” in the mechanics of composite materials, allows the mechanical characteristics of the rope to be determined in terms of the known geometrical parameters of its components, with consideration of the interaction of constituent elements. The results of the experimental investigation show that the interaction of individual structural components of the rope during the stretching process strongly affects the strength and deformation capacity properties determined at fracture. With an increase in the rope diameter from 5 to 18 mm, the relative strength of the core (normalized to the total cross-sectional area of the fibers) decreases by 10%. The use of the rule of mixtures appears to be promising for assessing the strength of braided ropes with the core and sheath materials having different elastic moduli.

Keywords

rule of mixtures polymer yarns braided rope tension stretching deformability fracture 

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • M. P. Zemtsov
    • 1
  • V. I. Skripchenko
    • 1
  1. 1.Pisarenko Institute of Problems of StrengthNational Academy of Sciences of UkraineKievUkraine

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