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research-article

PREDICTION OF THE RUPTURE PRESSURE OF TRANSMISSION PIPELINES WITH CORROSION DEFECTS

[+] Author and Article Information
Mechri Abdelghani

Mechanical engineering faculty, Composite structures and Innovative Materials Laboratory (LSCMI); University of Sciences and Technology, Mohamed Boudiaf (USTOMB), BP 1505, El M’naouer, Oran 31000, Algeria
abdelghani.mechri@univ-usto.dz

Ghomari Tewfik

Mechanical engineering faculty, Aeronautics and Propulsive Systems Laboratory (LASP), University of Sciences and Technology, Mohamed Boudiaf (USTOMB), BP 1505, El M’naouer, Oran 31000, Algeria
tewfikghomari@yahoo.com

Djahida Djouadi

Mechanical engineering faculty, Composite structures and Innovative Materials Laboratory (LSCMI); University of Sciences and Technology, Mohamed Boudiaf (USTOMB), BP 1505, El M’naouer, Oran 31000, Algeria
djahidai.djouadi@univ-usto.dz

Sfiat Sid Ahmed

Mechanical engineering faculty, University of Sciences and Technology, Mohamed Boudiaf (USTOMB), BP 1505, El M’naouer, Oran 31000, Algeria
sfiat@hotmail.com

1Corresponding author.

ASME doi:10.1115/1.4039698 History: Received October 14, 2017; Revised March 09, 2018

Abstract

This paper deals with the rupture of thin-walled ductile cylinders with isolated corrosion defects, subject only to internal pressure. It aims to propose a new solution for predicting the maximum load limit that will rupture a corroded pipeline, regardless of its material, its geometric ratio and the dimensions of the existing corrosion defect. This solution is a result of several numerical simulations by the variation of the length and depth of the defect with the assumption that the width of the defect had a negligible marginal effect. In all our numerical simulation analysis, the rupture was controlled by the Tresca failure criterion which is expressed in terms of material hardening exponent and the ultimate material stress. The proposed solution was then compared with the currently used coded methods, first B31.G, its improved version 0.85dL and then DNV-RP F101, using an experimental database compiled from existing literature. As a result, our proposed solution has been validated and has resulted in rupture ratios ranging from approximately 0.7 to 1. Furthermore, it has a tight prediction range as compared to the B31.G, 0.85dL, and the DNV-RP F101 methods.

Copyright (c) 2018 by ASME
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