The strain capacity of pipes under combined loading is an important research topic within strain-based design. While strain capacity equations assume homogeneous pipe material properties, a realistic pipeline shows scatter in mechanical properties. Test and simulation programs have indicated that this “pipe heterogeneity” may reduce the tensile strain capacity under uniaxial loading by a factor up to two. To date, its effect in other scenarios (compressive; combined internal pressure and axial plastic deformation) has received little attention. To investigate these scenarios and compare them with uniaxial tensile loading, Europipe, Salzgitter Mannesmann Forschung (SZMF) and Soete Laboratory, UGent have set up a large-scale test program on UOE pipe X70 (OD = 1219 mm, WT = 17.5 mm), comprising a full-scale pressurized bend test and curved wide plate tension tests. All tested welds joined pipes with nominally equal pipe grade from the same pipeline project, with strongly different actual properties. Optical full field strain measurements by means of digital image correlation reveal local effects of pipe heterogeneity on the strain distribution in the vicinity of the girth weld. All tests showed pronounced degrees of non-uniformity in strain development, in some cases even inhibiting plastic deformation in the stronger material as its weaker counterpart collapses. Implications of the observations with respect to strain-based design are discussed.
Skip Nav Destination
2018 12th International Pipeline Conference
September 24–28, 2018
Calgary, Alberta, Canada
Conference Sponsors:
- Pipeline Division
ISBN:
978-0-7918-5187-6
PROCEEDINGS PAPER
Influence of Material Heterogeneity on the Strain Capacity of Pipelines Available to Purchase
Susanne Höhler,
Susanne Höhler
Salzgitter Mannesmann Forschung GmbH, Duisburg, Germany
Search for other works by this author on:
Andreas Mondry,
Andreas Mondry
Salzgitter Mannesmann Forschung GmbH, Duisburg, Germany
Search for other works by this author on:
Christoph Kalwa,
Christoph Kalwa
Europipe GmbH, Mulheim a.d. Ruhr, Germany
Search for other works by this author on:
Kaveh Samadian,
Kaveh Samadian
Ghent University, Ghent, Belgium
Search for other works by this author on:
Wim De Waele,
Wim De Waele
Ghent University, Ghent, Belgium
Search for other works by this author on:
Stijn Hertelé
Stijn Hertelé
Ghent University, Ghent, Belgium
Search for other works by this author on:
Susanne Höhler
Salzgitter Mannesmann Forschung GmbH, Duisburg, Germany
Andreas Mondry
Salzgitter Mannesmann Forschung GmbH, Duisburg, Germany
Christoph Kalwa
Europipe GmbH, Mulheim a.d. Ruhr, Germany
Kaveh Samadian
Ghent University, Ghent, Belgium
Wim De Waele
Ghent University, Ghent, Belgium
Stijn Hertelé
Ghent University, Ghent, Belgium
Paper No:
IPC2018-78397, V002T06A004; 11 pages
Published Online:
November 6, 2018
Citation
Höhler, S, Mondry, A, Kalwa, C, Samadian, K, De Waele, W, & Hertelé, S. "Influence of Material Heterogeneity on the Strain Capacity of Pipelines." Proceedings of the 2018 12th International Pipeline Conference. Volume 2: Pipeline Safety Management Systems; Project Management, Design, Construction, and Environmental Issues; Strain Based Design; Risk and Reliability; Northern Offshore and Production Pipelines. Calgary, Alberta, Canada. September 24–28, 2018. V002T06A004. ASME. https://doi.org/10.1115/IPC2018-78397
Download citation file:
26
Views
Related Proceedings Papers
Related Articles
Simulated Bioprosthetic Heart Valve Deformation under Quasi-Static Loading
J Biomech Eng (November,2005)
Influence of Yield-to-Tensile Strength Ratio on Failure Assessment of Corroded Pipelines
J. Pressure Vessel Technol (November,2005)
Related Chapters
A 3D Cohesive Modelling Approach for Hydrogen Embrittlement in Welded Joints of X70 Pipeline Steel
International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions
Better Risk Management for Underground Pipelines and Tunnels Using Sound Geotechnical Interpretation
Geological Engineering: Proceedings of the 1 st International Conference (ICGE 2007)
Defect Assessment
Pipeline Integrity Assurance: A Practical Approach