Efficient fracture assessment of pipelines. A constraint-corrected SENT specimen approach

Matteo Chiesa, Bård Nyhus, Bjorn Skallerud, Christian Thaulow

Research output: Contribution to journalArticlepeer-review

88 Scopus citations

Abstract

Reeling has proven to be an efficient and cost effective method for offshore pipelaying. During the reeling process the pipe undergoes deformation that can strain the material by 1-2%. The existing failure assessment methods often turn out to be too conservative to allow such a strain level in the structure. The amount of conservatism can be significantly reduced by using a new failure assessment approach developed by SINTEF. This approach depends on finite element calculations for establishing the non-linear fracture mechanics parameters and the stress and strain distributions in the pipe. The present study addresses the performance of shell and line spring finite elements as a cost effective tool for performing such numerical calculations.

Original languageBritish English
Pages (from-to)527-547
Number of pages21
JournalEngineering Fracture Mechanics
Volume68
Issue number5
DOIs
StatePublished - 9 Mar 2001

Keywords

  • Constraint
  • Cracked shells
  • Failure assessment
  • Line springs
  • Plasticity
  • Shell finite elements
  • Solid finite elements

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