Analysis of Crack Behaviour in Pipeline System Using FAD Diagram Based on Numerical Simulation under XFEM

Abstract

For a long time, cracked structures have triggered various researchers to develop a structural integrity approach and design models to address the fracture problems. In the present study, a pipeline with an axial semi-elliptical surface defect was examined in detail. Recent works have highlighted the use of the classical finite element method (CFEM) as numerical tools to solve the fracture mechanics; however, this approach comes with a few difficulties in the modelling aspects. To overcome this issue, we proposed the use of the extended finite element method (XFEM), which was implemented in the commercial version of Abaqus software. Moreover, we have used the results based on this technique in the volumetric method to estimate the stress intensity factors (SIFs). Then, this parameter was employed to build the failure assessment diagram (FAD). The FAD curve was used in the current investigation because it is one of the conventional methods for the evaluation of flaws in steel pipes. The XFEM simulations enable us to draw an FAD curve that can be used as a practical reference for defect evaluation in pipeline systems in the industrial world.

Development of a Reliable Failure Assessment Diagram by Persian Curve

“…The (FAD) from Eq. (29) (KIII) by (Ocejo et al, 1997;Ainsworth, 1993;May, 2002;MacLennan, 1996;Schaser, 1994;Sanderson et al, 2015;Ainsworth et al, 2016;Amann, 2017;Orrock, 2018;Meek, 2017;Amara et al, 2018;Fuentes et al, 2018;Hassani et al, 2018;Hoh et al, 2018;Mai, 2018;Montassir et al, 2020) is compared with the unified Persian curve (PSU) in Fig. 8.…”

“…Pillai et al (2019) work covers the validation of standard safety assessment procedure in the new BS 7910: 2013+ A1:2015 for cracked joints. Analysis of crack behavior in pipeline system using (FAD) based on numerical simulation under XFEM is proposed by (Montassir et al, 2020).…”

Application of Failure Assessment Diagram (FAD) for Steel Welded Connection Based on BS7910 and DNV-RP-108

“…The introduction of the penalty factor of (1.1) guarantees that there are no assessment points, which are located in the intermediate region. Montessori's 2020 proposed a combined volumetric technique (VM) based on the extended finite element method (XFEM) to generate the FAD curve to check the safety of a (P264GH) steel gas pipe with a peak internal pressure of 6 MPa [16]. The geometry of their test was modeled with XFEM in a three-dimensional space of the solid type which was established with ABAQUS/CAE with the standard/explicit scheme.…”

Fracture Modelling of a Cracked Pressurized Cylindrical Structure by Using Extended Iso-Geometric Analysis (X-IGA)

“…Numerical simulation and discontinuity problems still do not agree, since researchers are always looking to improve numerical solutions to be able to reflect reality. In this sense, various numerical methods are developed that cite the classical finite element method (CFEM) [1,2], element-free Galerkin methods (EFG) [3], the extended finite element method (X-FEM) [4][5][6], the phase field numerical manifold method (PFNMM) [7], the boundary element method [8], and the thermo-mechanical peridynamic model (TMPM) [9]. Despite the huge use of the CFEM, however, it suffers from a certain lack of treatment of the cracking problems; it imposes that the mesh conforms with the crack or to a surface defect, and adopting a specific mesh creates difficulties at the simulation stage.…”