Fatigue crack growth behaviour of semi-elliptical surface cracks for an API 5L X65 gas pipeline under tension

M. S. Shaari, M. R.M. Akramin, Ahmad Kamal Ariffin Mohd Ihsan, Shahrum Abdullah, M. Kikuchi

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

The paper is presenting the fatigue crack growth (FCG) behavior of semi-elliptical surface cracks for API X65 gas pipeline using S-version FEM. A method known as global-local overlay technique was used in this study to predict the fatigue behavior that involve of two separate meshes each specifically for global (geometry) and local (crack). The pre-post program was used to model the global geometry (coarser mesh) known as FAST including the material and boundary conditions. Hence, the local crack (finer mesh) will be defined the exact location and the mesh control accordingly. The local mesh was overlaid along with the global before the numerical computation taken place to solve the engineering problem. The stress intensity factors were computed using the virtual crack closure-integral method (VCCM). The most important results is the behavior of the fatigue crack growth, which contains the crack depth (a), crack length (c) and stress intensity factors (SIF). The correlation between the fatigue crack growth and the SIF shows a good growth for the crack depth (a) and dissimilar for the crack length (c) where stunned behavior was resulted. The S-version FEM will benefiting the user due to the overlay technique where it will shorten the computation process.

Original languageEnglish
Article number012041
JournalIOP Conference Series: Materials Science and Engineering
Volume308
Issue number1
DOIs
Publication statusPublished - 19 Feb 2018

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Gas pipelines
Fatigue crack propagation
Application programming interfaces (API)
Cracks
Stress intensity factors
Finite element method
Crack closure
Geometry
Boundary conditions
Fatigue of materials

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

Fatigue crack growth behaviour of semi-elliptical surface cracks for an API 5L X65 gas pipeline under tension. / Shaari, M. S.; Akramin, M. R.M.; Mohd Ihsan, Ahmad Kamal Ariffin; Abdullah, Shahrum; Kikuchi, M.

In: IOP Conference Series: Materials Science and Engineering, Vol. 308, No. 1, 012041, 19.02.2018.

Research output: Contribution to journalConference article

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