STRUCTURAL MECHANICS OF MARINE CABLES AND UMBILICALS IN ROTARY BENDING TEST RIGS

In this paper the rotary bending test is considered and a theoretical model developed which predicts the stresses and strains within the cable structure, in particular the helical components. The theoretical model presented takes into account the terminal boundary conditions and the finite sample length. An important feature of the analytical model is that it permits an arbitrary curvature distribution along the length of the marine cable or umbilical. The model is used to predict the cyclic strains in the helical components as a marine cable or umbilical rotates in the test rig. This strain time history can then be used to predict the fatigue life of the helical components which then may be compared with results from the test. The objective is to establish a theoretical model which, once verified by experimental data, can be extended to predict the in-service time to failure of the helical components within a marine cable or umbilical. Copies of this paper are not available from BMT, please contact the publisher: BPP Technical Services Ltd., Aldine Place, London W12, U.K.

• Supplemental Notes:
  • MARINFLEX 92, 1st European Conf on Flexible Pipes, Umbilicals, Marine Cables; 10-11 Nov 1992; London, U.K. Procs. Publ by BPP Technical Services Ltd., London, U.K. Paper 1 [19 p, 11 ref, 3 tab, 4 fig]
• Authors:
  • Witz, J
  • Tan, Z
• Publication Date: 1992

Language

• English

Subject/Index Terms

• TRT Terms: Bend tests; Cables; Mechanical properties
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00704547
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM