Finite element analysis of the integrity of an API X65 pipeline with a longitudinal crack repaired with single- and double-bonded composites

Madjid Meriem-Benziane, Sabah A. Abdul-Wahab, Hamou Zahloul, Benoauda Babaziane, Mohamed Hadj-Meliani, Guy Pluvinage

Research output: Contribution to journalArticle

16 Citations (Scopus)


The objective of this study was to compare the performance of the repaired longitudinal cracks in API X65 pipelines under two different conditions: with patches (i.e., single and double patches) and without patches. The three-dimensional finite element method (FEM) was used to compute the stress intensity factors (SIF) at the crack tip. Repairing cracks under internal pressure using carbon-epoxy composites was investigated where the influence of both the single- and double-sided patches made of composite and adhesive were included. In the evaluation of the repair of the pipeline, the failure assessment diagram (FAD) was introduced to obtain the safety factor value. The obtained results indicated that the value of the factor of safety depends on both the crack length and the pressure. In addition, the results showed that the suggested technique is sufficient in predicting the behavior of the repairs.

Original languageEnglish
Pages (from-to)431-439
Number of pages9
JournalComposites Part B: Engineering
Publication statusPublished - Aug 1 2015



  • B. Adhesion
  • B. Mechanical properties
  • C. Finite element analysis (FEA)

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

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