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Interpretation of stress-strain curve in pipeline research
Wellekens, J.-B.; De Waele, W.; Denys, R.; Hertelé, S.; Verstraete, M. (2010). Interpretation of stress-strain curve in pipeline research, in: Proceedings of the Day of Research 2010. Sustainable Construction & Design, 1: pp. 40-45
In: (2010). Proceedings of the Day of Research 2010. Sustainable Construction & Design, 1. Ghent University. Laboratory Soete: Ghent. ISBN 9789490726003. , more
In: Sustainable Construction & Design. Laboratory Soete of Ghent University: Ghent. ISSN 2032-7471, more

Available in  Authors 
Document type: Conference paper

Authors  Top 
  • Wellekens, J.-B.
  • De Waele, W., more
  • Denys, R., more
  • Hertelé, S., more
  • Verstraete, M., more

Abstract
    For the design of on-shore pipelines installed in areas that are susceptible to ground movements and offshore pipelines, axial stresses above yield must be considered. In such so-called strain-based design, knowledge of the stress-strain behaviour of the pipeline steel and girth welds is highly important. These behaviours are influenced by many factors, including: welding parameters, operation temperature, tensile test specimen geometry and orientation, and microstructure of the steel. This paper focuses on the influence of the tensile test specimen geometry and orientation, for the case of UOE formed pipes. As regards the geometry, it is concluded that the stress-strain diagram is most representative for a flat fullthickness test specimen. As regards the orientation, the yield stress is higher for transversal test specimens, as compared to longitudinally oriented test specimens.

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