TY  - BOOK
AU  - Nurul Baini Ghazali,
TI  - Predicting surface crack growth behaviour for an api 5l x65 gas pipeline using s-version finite element method
SN  - THE0010090 (Local)
PY  - 2025///
CY  - Kuantan, Pahang
PB  - UMPSA
KW  - Faculty of Mechanical and Automotive Engineering Technology
KW  - Dissertations
KW  - Universities and colleges
N1  - Faculty of Mechanical and Automotive Engineering Technology; Thesis (Master of Science) -- Universiti Malaysia Pahang – 2025; Includes bibliographical references
N2  - The thesis describes the fatigue crack growth (FCG) behaviour of API 5L X65 gas pipeline  surface cracks using S-version FEM. API 5L X65 is widely used in oil & gas for  transportation of hydrocarbon gas and crude oil from upstream facilities to downstream  facilities and end user such as power station, petrochemicals industries, transportation  industries and residential. Beside to suit the purpose in term of chemical and mechanical  properties, API 5L X65 is cost effective and have better strength compared to other material  grade. Nowadays, the major concern of the engineering application is the material failure.  Hence, the fatigue crack analysis needs to carry out to determine the fatigue life of a material.  This is important as it is involving the human safety and lead to fatality. In this study, a  method known as global-local overlay technique was used to predict fatigue behaviour, which  involves two separate meshes, one for global (geometry) and one for local (physics) (crack)  by using S-version Finite Element Method (S-version FEM). The pre-post program was used  to model the FAST global geometry (coarser mesh) so called CentOS programming, which  included the material and boundary conditions. As a result, the exact location of the local  crack (finer mesh) will be defined, and the mesh control will be adjusted accordingly. The  Paris’ crack model is used to predict the fatigue crack behaviour of this material. Local mesh  was overlaid with the global mesh before the numerical computation to solve the engineering  problem. The virtual crack closure-integral method (VCCM) was used to calculate the stress  intensity factors (SIF). The most important result is the fatigue crack growth behaviour, which  includes the crack depth (a), crack length (c), and stress intensity factors (SIF). The SIF value is important as it affect the crack growth. Then, the fatigue crack growth with 0.4 aspect ratio (a/c) is determined. After that, different a/c is used to compare the result obtained in S-version FEM with analytical solution in Newman & Raju 1979
ER  -