SYNTHETIC MOORING LINE TENSILE TESTING PROCEDURE
This report describes an effort to determine whether or not a tensile test procedure is necessary that will provide commonality among tensile tests of synthetic lines of all materials, diameters and lengths. A relationship was derived that relates material stiffness, diameter, and sample lengths to the strain rate during a tensile test. A first order experiment was conducted in which synthetic lines were tensile tested at various strain rates to determine to what degree tensile strength is affected by strain rate. Results show that the dispersion among individual data points overshadows the general trend of any strain rate effect and negates the need for a specific relationship. It is recommended that the strain rate be kept below 5 millistrains per second because the data points in that range are less disperse and the results derived from them should be more reliable. Some variation was observed between manufacturer's rated breaking strength and the test data. Although there are exceptions, a variation in strain rate generally has an insignificant effect on elongation at failure, spring constant and unit energy absorption.
Coast GuardOffice of Research and Development
Washington, DC United States
- Bitting, K R
- Publication Date: 1975-9
- Pagination: 27 p.
- TRT Terms: Length; Mechanical tests; Moorings; Strain (Mechanics); Synthetic fibers; Tensile properties
- Uncontrolled Terms: Destructive tests; Elongation
- Subject Areas: Marine Transportation; Materials;
- Accession Number: 00151131
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: CGR/DC-22-75, USCG-D-104-76
- Files: NTIS
- Created Date: Mar 30 2002 12:00AM