Prediction of Tensile Strain Capacity for X52 Steel Pipeline Materials Using the Extended Finite Element Method

Nahid Elyasi; Mohammadmehdi Shahzamanian; Meng Lin; Lindsey Westover; Yong Li; Muntaseer Kainat; Nader Yoosef-Ghodsi; Samer Adeeb

doi:10.3390/applmech2020013

Applied Mechanics (Apr 2021)

Prediction of Tensile Strain Capacity for X52 Steel Pipeline Materials Using the Extended Finite Element Method

Nahid Elyasi,
Mohammadmehdi Shahzamanian,
Meng Lin,
Lindsey Westover,
Yong Li,
Muntaseer Kainat,
Nader Yoosef-Ghodsi,
Samer Adeeb

Affiliations

Nahid Elyasi: Department of Mechanical Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
Mohammadmehdi Shahzamanian: Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
Meng Lin: Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
Lindsey Westover: Department of Mechanical Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
Yong Li: Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
Muntaseer Kainat: Enbridge Pipelines Inc., Edmonton, AB T5J 0T6, Canada
Nader Yoosef-Ghodsi: Enbridge Pipelines Inc., Edmonton, AB T5J 0T6, Canada
Samer Adeeb: Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada

DOI: https://doi.org/10.3390/applmech2020013
Journal volume & issue: Vol. 2, no. 2
pp. 209 – 225

Abstract

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Strain-based design (SBD) plays an important role in pipeline design and assessment of pipelines subjected to geo-hazards. Under such hazards, a pipe can be subjected to substantial plastic strains, leading to tensile failure at locations of girth weld flaws. For SBD, the finite element method (FEM) can be a reliable tool to calculate the tensile strain capacity (TSC) for better design in pipelines. This study aims to investigate the ductile fracture properties for specific vintage pipeline steel (API 5L grade of X52) using the extended finite element method (XFEM). Eight full-scale tests were simulated using the commercial finite element analysis software ABAQUS Version 6.17. Maximum principal strain is used to assess the damage initiation using the cohesive zone model (CZM) when the crack evolution is evaluated by fracture energy release. A proper set of damage parameters for the X52 materials was calibrated based on the ability of the model to reproduce the experimental results. These experimental results included the tensile strain, applied load, endplate rotation, and crack mouth opening displacement (CMOD). This study describes a methodology for validation of the XFEM and the proper damage parameters required to model crack initiation and propagation in X52 grades of pipeline.

Published in Applied Mechanics

ISSN: 2673-3161 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: https://www.mdpi.com/journal/applmech

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