Fatigue and Weatherability Studies of Aramid-Fiber Rope Slings.

Abstract

Tests were carried out on twenty-six sling-leg specimens, fabricated from aramid-fiber ropes, as part of a program to develop improved external cargo slings for helicopters. The ropes included both parallel-strand and cabled-strand varieties, in three different tensile capacities. The tests were intended to evaluate the reductions in rope strength caused by fatigue loading and by exposure to simulated weathering. It was found that the fatigue capabilities of some of the ropes may not be entirely satisfactory; but, because of inadequacies in the end fittings installed by the rope manufacturers, thorough evaluations were not possible. The results indicate that the performances of the ropes could be enhanced through the use of more efficient end fittings, and suggestions for the development of such end fittings are offered. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1976
Accession Number
ADA305243

Entities

People

  • Leonard Mordfin
  • Nixon Halsey

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aramid Fibers
  • Construction
  • Engineering
  • Environment
  • Failure Mode And Effect Analysis
  • Fatigue Tests (Mechanics)
  • Fibers
  • Filaments
  • Materials
  • Materials Laboratories
  • Materials Science
  • Materials Testing
  • Mechanics
  • Synthetic Fibers
  • Test And Evaluation
  • Test Equipment
  • Weathering

Readers

  • Electrical Engineering
  • Logistics and Supply Chain Management.
  • Materials Science and Engineering.