Fracture Parameters for Buried Cast Iron Pipes Subjected to Internal Surface Corrosions and Cracks

Published on May 1, 2021
· DOI :10.1016/J.JPSE.2021.04.001
Atika Hossain Akhi , Ashutosh Sutra Dhar9
Estimated H-index: 9
#1Atika Hossain Akhi (MUN: Memorial University of Newfoundland)
#2Ashutosh Sutra Dhar (MUN: Memorial University of Newfoundland)H-Index: 9
Abstract The municipal water distribution systems across the world include a significant amount of cast-iron pipes. Many of the buried cast-iron pipes are over fifty years old and require rehabilitation. Municipalities decide on a rehabilitation solution between the replacement and re-use of the existing pipes based on the remaining strengths of the pipes. Fracture mechanics has appeared as the most viable tool for remaining strength assessment of the deteriorating pipes. However, a method of as...
#1Suborno DebnathH-Index: 1
#2Ismail Muftah Ali (MUN: Memorial University of Newfoundland)H-Index: 1
Last. Premkumar Thodi (St. John's University)H-Index: 8
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Municipal water distribution systems in Canada and other countries include a large number of cast iron pipes that were installed almost 50 years ago. For structural integrity assessment of these pi...
#1Soufiane MontassirH-Index: 1
Last. Catalin I. PruncuH-Index: 19
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#1Muhammad Wasim (University of Melbourne)H-Index: 8
#2Chun-Qing Li (RMIT: RMIT University)H-Index: 22
Last. Mojtaba Mahmoodian (RMIT: RMIT University)H-Index: 11
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Abstract Corrosion induced degradation of fracture toughness in buried cast iron pipes is a serious concern for structural integrity and smooth operation of buried pipes. External corrosion of pipes is fundamentally governed by the corrosivity of soil which may vary depending on the type of soil and its specific properties. While the corrosion assessments of pipes buried in soil can provide realistic behaviour, the investigations of pipe corrosion in simulated soil solutions are becoming popular...
4 CitationsSource
#1Bipul Chandra Mondal (MUN: Memorial University of Newfoundland)H-Index: 5
#2Ashutosh Sutra Dhar (MUN: Memorial University of Newfoundland)H-Index: 9
Abstract In the conventional method of analysis for the remaining strength assessment of a corroded pipeline, von Mises failure criterion is used. This continuum-based modelling approach is unable to assess the cracking of the pipeline. In this study, a fracture mechanics approach is used for the assessments of burst pressures of pipelines with corrosion only defects, pipelines with crack-like defects and pipelines with crack-in-corrosion defects. The fracture mechanics approach with the J-integ...
1 CitationsSource
#1Kasuni T. H. Liyanage (MUN: Memorial University of Newfoundland)H-Index: 2
#2Ashutosh Sutra Dhar (MUN: Memorial University of Newfoundland)H-Index: 9
A number of water main breaks occur every year in municipalities due to ageing, aggressive environmental conditions and undesirable soil conditions. However, the failure mechanism observed in cast iron water mains is often obscure. Non-uniform soil support conditions resulting from the erosion of the surrounding soil by the water escaping from leaks may induce excessive stresses on the pipe wall. Due to partial erosion of backfill soil or the presence of large rock pieces, the localised point su...
5 CitationsSource
#1Weigang Wang (RMIT: RMIT University)H-Index: 5
#2Annan Zhou (RMIT: RMIT University)H-Index: 30
Last. Mojtaba Mahmoodian (RMIT: RMIT University)H-Index: 11
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Abstract Underground pipes are essential infrastructure for water, oil and gas transport. The presence of localized pitting corrosion has been identified as one of the main deterioration mechanisms for metal pipes, which, when exposed to external loadings, can easily fail due to intensified stresses at the corrosion pit. The assessment of such an intensified stress field around the pit has been a key focus for decades since it is a major mode of pipe failures. Although stress intensity factors f...
15 CitationsSource
AbstractCircumferential cracking or ring fracture has been identified as the most common type of failure mode for cast-iron water mains. However, the cause of circumferential cracking in water main...
2 CitationsSource
#1Alexandre Jean Pachoud (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 4
#2Pedro Manso (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 10
Last. Anton Schleiss (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 33
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When for steel liners of pressure tunnels and shafts high-strength steels are used, welded joints are subject to the risk of hydrogen induced cold-cracking in the base material. Longitudinal butt welded joints are critical regions as they are loaded transversely. For an accurate engineering fatigue and fracture assessment, solutions for stress intensity factors (SIF) are required, considering the weld shape and the global behavior of the liner (i.e., geometrical imperfections and interaction wit...
6 CitationsSource
#1Azadeh Fahimi (University of Surrey)H-Index: 1
#2T. S. EvansH-Index: 3
Last. Paul Smith (University of Surrey)H-Index: 41
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Worldwide, a significant proportion of the large diameter (trunk) mains within water networks are still made of aging cast iron material. With corrosion seeming to be the most significant cause of deterioration in cast iron trunk mains, the traditional structural view of the residual strength of the pipe has been based on the strength of the remaining wall thickness, i.e. a loss-of-section approach. In some situations this may lead to an over-estimate of the residual strength and better predicti...
9 CitationsSource
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