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OMAE2017-62644 The Effect of Stick Stiffness of Friction Models on the Bending Behavior in Non-Bonded Flexible Risers

Abstract

This paper investigates the effect of stick stiffness on the bending behavior in non-bonded flexible risers. The stick stiffness was normally implemented in the friction model for calculating the friction stress between layers in such structures. As the stick stiffness may be too small to achieve the plane-surfaces-remain-plane assumption under low contact pressure in some friction models [1], a new friction model was proposed for maintaining the constant stick stiffness in the present work. Less stick stiffness than that obtained by the plane-surfaces-remain-plane assumption was observed in test data. It was assumed that the stick stiffness reduction is caused by shear deformation of plastic layers. A numerical study on stick stiffness by including the shear deformation effect was carried out and verified against full scale tests with respect to the bending moment-curvature relationship.

Category

Academic chapter

Language

English

Author(s)

Affiliation

  • SINTEF Ocean / Energi og transport
  • Norwegian University of Science and Technology

Year

2017

Publisher

The American Society of Mechanical Engineers (ASME)

Book

ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 5A: Pipelines, Risers, and Subsea Systems

ISBN

9780791857694

View this publication at Norwegian Research Information Repository